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Phase Modulation patents



      
           
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Date/App# patent app List of recent Phase Modulation-related patents
04/10/14
20140099128
 Inter-band cross-phase modulation compensation for the mitigation of intra-channel nonlinear impairments in optical fiber transmission patent thumbnailInter-band cross-phase modulation compensation for the mitigation of intra-channel nonlinear impairments in optical fiber transmission
An optical communication system includes a digital signal processer coupled to the coherent receiver, said coherent receiver including a nonlinearity compensation module for compensating for nonlinear effects in fiber in the optical link for increasing capacity or transmission distance of the fiber, the nonlinearity compensation module includes a spectral slicing of the signal into bands, computing nonlinear interaction between the bands with parameters opposite to those of the fiber to reverse the non-linear effects in the fiber, and only certain nonlinear interactions between bands are considered thereby reducing complexity of the nonlinearity compensation.. .
04/10/14
20140098967
 Output phase modulation entrainment containment for digital filters patent thumbnailOutput phase modulation entrainment containment for digital filters
Method and apparatus for entrainment containment in digital filters using output phase modulation. Phase change is gradually introduced into the acoustic feedback canceller loop to avoid entrainment of the feedback canceller filter.
03/13/14
20140072257
 Wavelength selective optical switch patent thumbnailWavelength selective optical switch
A wavelength selective optical switch includes a light input/output unit having a plurality of input/output ports, a polarization plane-independent wavelength dispersion element that splits incident light input from the optical input/output unit into spatially different angles for each wavelength, and synthesizes emergent light from different directions and outputs the light to the optical input/output unit, a condenser element that condenses the light split by the wavelength splitting element, a polarization splitter that splits incident light incident via the condenser element according to a polarization component to result in first and second light beams, aligns a polarization direction by rotating a polarization direction of one of the beams, and synthesizes the incident light by rotating one polarization direction of the emergent light of the same wavelength among the first and second reflected light beams, and a space phase modulation element.. .
03/06/14
20140065805
 Manufacturing method of semiconductor device and semiconductor manufacturing apparatus patent thumbnailManufacturing method of semiconductor device and semiconductor manufacturing apparatus
According to one embodiment, a manufacturing method of a semiconductor device includes forming a crystal film on a semiconductor substrate by irradiating the semiconductor substrate with a first microwave, obtained by providing frequency modulation or phase modulation of a first carrier wave which is a sine wave with a first frequency, using a first signal wave which is a sine wave or a pulse wave with a third frequency lower than a first frequency, and irradiating the semiconductor substrate with a second microwave, obtained by providing frequency modulation or phase modulation of a second carrier wave, which is a sine wave with a second frequency higher than the first frequency, using a second signal wave which is a sine wave or a pulse wave with a fourth frequency lower than the second frequency.. .
02/27/14
20140055830
 Phase mask and holographic recording apparatus employing the same patent thumbnailPhase mask and holographic recording apparatus employing the same
A phase mask includes a phase modulation layer that modulates a phase of different portions of incident light, differently, such that a different optical phase delay, in a range between 0 and 2π is imparted to different portions of the incident light. A hologram recording apparatus includes a light source; a signal beam optical system that divides a beam emitted from the light source into a reference beam and a signal beam, modulates the signal beam according to hologram pixel information, and radiates the signal beam onto a hologram recording medium.
02/20/14
20140050476
 Systems and methods for the compensation of nonlinear cross polarization and cross phase modulation in dual polarization coherent channels patent thumbnailSystems and methods for the compensation of nonlinear cross polarization and cross phase modulation in dual polarization coherent channels
The present disclosure provides systems and methods for the compensation of signal distortion in fiber optic communication systems and the like. More specifically, the present disclosure provides an orthogonal polarization detection and broadband pilot (opdbp) technique for the compensation of nonlinear cross polarization (i.e.
02/06/14
20140036939
 Modular, high energy, widely-tunable ultrafast fiber source patent thumbnailModular, high energy, widely-tunable ultrafast fiber source
A modular, compact and widely tunable laser system for the efficient generation of high peak and high average power ultrashort pulses. Peak power handling capability of fiber amplifiers is expanded by using optimized pulse shapes, as well as dispersively broadened pulses.
02/06/14
20140036206
 Spatial light modulator, and spatial light modulating method patent thumbnailSpatial light modulator, and spatial light modulating method
A spatial light modulation device includes a liquid crystal layer modulating a phase of incident light according to a level of an applied electric field, a temperature sensor generating a temperature signal corresponding to a temperature of the liquid crystal layer, a plurality of pixel electrodes provided for each of a plurality of pixels and applying a voltage to the liquid crystal layer, and a driving device providing a voltage to the plurality of pixel electrodes. The driving device has a nonvolatile storage element storing in advance a coefficient α included in a function expressing a correlation between a temperature change amount in the liquid crystal layer and a variation in phase modulation amount in the liquid crystal layer, and performs a calculation for correcting a level of voltage by use of a temperature indicated by the temperature signal and the coefficient α..
02/06/14
20140036182
 Phase modulating apparatus and phase modulating method patent thumbnailPhase modulating apparatus and phase modulating method
The present invention relates to a phase modulating apparatus capable of highly accurately and easily correcting the phase modulation characteristic of a reflective electric address spatial light modulator even when a condition of input light is changed. In the lcos phase modulating apparatus, an input unit inputs the condition of the input light, and a processing unit sets an input value for each pixel.
01/30/14
20140028934
 Method for despeckling in laser display systems patent thumbnailMethod for despeckling in laser display systems
A device used in laser display systems for despeckling includes a liquid crystal cell disposed in sandwiched relation between an input and a grounded electrode. A glass cover overlies each electrode.
01/23/14
20140023372
Method and apparatus for dynamic wavelength allocation in wavelength switched optical networks
A method of allocating a wavelength to a lightpath in a wavelength multiplex for use in an optical network comprising nodes connected by optical links, wherein the wavelength multiplex is adapted to support lightpaths of two different bitrates. The disclosed method allows for efficient allocation of wavelengths that prevents wasting bandwidth and mitigates detrimental effects of cross-phase modulation..
01/23/14
20140023364
Establishing connections in a multi-rate optical network
An optical transmission network comprises nodes which support a plurality of different wavelength channels and support at least a first bitrate traffic type and the second bitrate traffic type on respective wavelength channels. A connection of the second bitrate traffic type is established on an available wavelength, if the wavelength offers an acceptable quality of transmission using a first quality of transmission calculation.
01/23/14
20140023311
Practical silicon photonic multi-function integrated-optic chip for fiber sensor applications
This patent disclosure is based on a silicon, instead of linbo3, waveguide chip. The disclosed silicon-based multi-function integrated-optic chip comprises a unique design and fabrication features onto it.
01/23/14
20140022474
Spatial light modulator, and spatial light modulating method
A spatial light modulation device includes a liquid crystal layer modulating a phase of incident light according to a level of an applied electric field, a temperature sensor generating a temperature signal corresponding to a temperature of the liquid crystal layer, a plurality of pixel electrodes provided for each of a plurality of pixels and applying a voltage to the liquid crystal layer, and a driving device providing a voltage to the plurality of pixel electrodes. The driving device has a nonvolatile storage element storing in advance a coefficient α included in a function expressing a correlation between a temperature change amount in the liquid crystal layer and a variation in phase modulation amount in the liquid crystal layer, and performs a calculation for correcting a level of voltage by use of a temperature indicated by the temperature signal and the coefficient α..
01/16/14
20140016655
Reducing the spectral bandwidth of lasers
A laser system for semiconductor inspection includes a fiber-based fundamental light source for generating fundamental light that is then converted/mixed by a frequency conversion module to generate uv-duv laser light. The fundamental light source includes a nonlinear chirp element (e.g., a bragg grating or an electro-optic modulator) that adds a nonlinear chirp to the seed light laser system prior to amplification by the fiber amplifier(s) (e.g., doped fiber or raman amplifiers).
01/09/14
20140010530
Optical transmitter, wavelength multiplexing transmission device and optical transmission method
An optical transmitter includes: a modulator; an output light monitoring unit; and a control unit. The modulator includes a dividing unit dividing light inputted to the modulator into first and second branch lights; first and second modulation units performing phase modulation for the first and second branch lights, respectively; a rotator which rotates the polarization plane of one of the first and second modulated lights; and a polarization combining unit combining the first and second modulated lights.
01/09/14
20140010248
Tunable bragg grating and a tunable laser diode using same
A spatially modulated waveguide bragg grating mirror is suspended over a substrate by plurality of fingers extending laterally away from the waveguide centerline. The positions of the fingers are coordinated with the positions of crests and valleys of amplitude or phase modulation of the bragg grating, to avoid disturbing the bragg grating when it is tuned by heating.
01/09/14
20140008525
Correlation confocal microscope
A correlation confocal microscope uses correlated photon pairs to improve resolution. It employs a source of a light beam converging to a point location on a sample, and an objective that gathers light from the point location and generates an image beam.
01/02/14
20140003824
Equalization mechanism for processing traffic based on three-quadrature amplitude modulation (3qam)
A system receives four-bit symbols that correspond to traffic associated with a three-bit phase modulation scheme and are encoded based on a four-bit phase modulation scheme. The system determines values with which to perform equalization that enable the four-bit symbols to be restored to a condition that existed prior to being transmitted to the system.
01/02/14
20140003814
Processing three-quadrature amplitude modulation (3qam) traffic using a four-bit phase modulation scheme
A system receives traffic that includes four-bit symbols, the four-bit symbols being encoded using a four-bit phase modulation scheme; and processes the traffic to recover a four-bit symbol. The system also decodes the recovered four-bit symbol to obtain a three-bit symbol.
01/02/14
20140003555
Phase compensation receiver
A phase excursion compensation circuit of a phase modulation signal demodulator detects occurrence of a slip of a received signal from a change in a phase compensation amount that is formed into the received signal by a phase excursion compensation unit, and corrects the phase compensation amount of the received signal after the slip is generated.. .
12/26/13
20130343694
Optical gate switch
An object of the present invention is to realize an optical gate switch of a monolithic integration type which can avoid problems of losses caused by light coupling of a phase modulation unit to a interferometer optical circuit unit, and can be minimized by integration. The optical gate switch according to the present invention includes an optical waveguide wafer in which a quantum well having a phase modulation effect which is generated by an intersubband transition is set as a core layer; a michelson interferometer formed on the optical waveguide wafer; and a variable light intensity attenuation unit adjusting a light balance of an interferometer in one of reflection side arms of the michelson interferometer reflection..
12/26/13
20130343173
Transmitter
The invention provides a transmitter comprising two (or more) phase locked loops controlling respective oscillators, and implementing different phase modulation. Multiple phases are derived from the respective oscillators, and an edge rotator forms an output signal from a combination of the phases.
12/19/13
20130335841
Implementing combined phase and amplitude magnetic defect detection on-the-fly
A method, apparatus, and system are provided for implementing magnetic defect location detection on-the-fly for hard disk drives. A magnetic media readback signal of a hard disk drive is demodulated to generate phase modulation (pm) and amplitude modulation (am) signals.
12/12/13
20130330207
Aircraft motor drive control apparatus and aircraft actuator hydraulic system
A controller that performs pulse width modulation control of a three-phase inverter circuit includes a three-phase modulation voltage command value generation unit, a two-phase modulation voltage command value generation unit, a voltage command switching unit, and a pwm signal output unit. The voltage command switching unit switches a voltage command value to a two-phase modulation voltage command value when a determination value becomes larger than or equal to a first threshold value, and switches the voltage command value to a three-phase modulation voltage command value when the determination value becomes smaller than a second threshold value, which is smaller than the first threshold value..
11/28/13
20130315345
Mobile wireless communications device with separate in-phase (i) and quadrature (q) phase power amplification and power amplifier pre-distortion and iq balance compensation
A communications device, in one aspect as a portable wireless communications device, includes an in-phase modulator and power amplifier that receives a baseband i signal and modulates and amplifies the i signal. A quadrature modulator and power amplifier receives a baseband q signal and modulates and amplifies the q signal.
11/21/13
20130308593
User terminal, radio base station apparatus and radio communication method
The present invention adequately controls feedback control information in uplink transmission in a system band formed with a plurality of ccs. The present invention provides a data information demodulation section, which demodulates downlink shared channel signals of ccs from a radio base station apparatus, a retransmission check section, which checks retransmission and outputs a retransmission acknowledgement signal in response to the downlink shared channel signal of each of the plurality of ccs, a control information demodulation section, which demodulates downlink control information and detects the number of transport blocks, and a channel selection control section, which, with reference to a mapping table in which combinations of retransmission acknowledgement signals for the downlink shared channel signals of the plurality of ccs are defined using a plurality of radio resources and phase modulation bit information, determines radio resources to use to transmit the retransmission acknowledgement signals from a radio resource of an uplink control channel of a specific cc, and changes the content of the mapping table according to the number of transport blocks of the specific fundamental frequency block..
11/07/13
20130294220
Method and apparatus for transmitting and receiving signals
A transmission apparatus couples a first phase modulation signal for first input data and a second phase modulation signal for second input data according to a first coupling method and transmits the coupled signal, and a reception apparatus receives the coupled signal. The reception apparatus derives a signal in which a first phase modulation signal and a second phase modulation signal are coupled according to a second coupling method from a received signal and separates the first phase modulation signal and the second phase modulation signal from the received signal based on the received signal and the derived signal.
11/07/13
20130293947
All-fiber chirped pulse amplification systems
By compensating polarization mode-dispersion as well chromatic dispersion in photonic crystal fiber pulse compressors, high pulse energies can be obtained from all-fiber chirped pulse amplification systems. By inducing third-order dispersion in fiber amplifiers via self-phase modulation, the third-order chromatic dispersion from bulk grating pulse compressors can be compensated and the pulse quality of hybrid fiber/bulk chirped pulse amplification systems can be improved.
10/31/13
20130286453
Laser emitting apparatus using a basic hologram and a focusing hologram
A laser processing apparatus including a laser light source, a phase modulation type spatial light modulator, a driving unit, a control unit, and an imaging optical system. A storage unit that is included in the driving unit stores a plurality of basic holograms corresponding to a plurality of basic processing patterns and a focusing hologram corresponding to a fresnel lens pattern.
10/17/13
20130272273
Methods and devices for transmission of signals in a telecommunication system
Transmitter and receiver technologies are provided that allow more than two users in a time-slotted communications system to share the same time slot by creating orthogonal sub-channels, while keeping the receiver complexity low are provided. Moreover, the users can in accordance with some embodiments employ gmsk or other non-linear continuous phase modulation technique..
10/17/13
20130271271
Receiving control circuit for a wall control interface with phase modulation and detection for power management
A wall control interface for power management includes a transmitting circuit that generates a switching signal to control a switch and achieve a phase modulation to a power line signal in response to a transmitting-data. A receiving circuit is coupled to detect the phase of the power line signal for generating a data signal and a receiving-data in response to the phase of the power line signal.
10/10/13
20130266311
Method and apparatus for estimating cross-phase modulation impairments
A system for estimating cross-phase modulation (xpm) impairments, wherein the method comprises: determining, according to a pump jones matrix of a pump channel and a probe jones matrix of a probe channel of each of fiber spans except for the first fiber span in a fiber transmission system, a polarization mode dispersion (pmd)-induced relative polarization status rotation matrix between channels of the each of fiber spans; and determining, according to the rotation matrix of the each of fiber spans, dispersion of a pump signal of the each of fiber spans, differential delay of the pump signal relative to a probe signal of the each of fiber spans and a gain of the each of fiber spans, polarization crosstalk and phase noise of the xpm impairments in the fiber transmission system. This allows the xpm impairments in the effect of the polarization mode dispersion to be quickly and accurately estimated,.
10/10/13
20130266257
Optical waveguide switch
Techniques are described to form an optical waveguide switch that could reach a very high extinction ratio. In particular, this disclosure describes an asymmetric mzi, in which different waveguide capacitor structures are used in two arms of the mzi: a first arm with a waveguide capacitor to achieve the mainly phase modulation and a second arm with a waveguide capacitor to achieve mainly the magnitude modulation, respectively.
10/10/13
20130266089
Wideband phase modulation methods and apparatus
A wideband phase modulator comprises a multiphase generator, a phase selector, and a phase adjuster. The wideband phase modulator is configured to receive an n-bit digital phase-modulating signal comprising a timed sequence of n-bit phase-modulating words, where n is a positive integer representing the bit resolution of the n-bit digital phase-modulating signal.
10/03/13
20130259480
Optical transmission apparatus
An optical transmission apparatus includes transmitters configured to correspond to the polarization multiplexing optical signals, each of at least two of the transmitters including a first computing unit that computes, based on information regarding an optical transmission line including a plurality of spans and a polarization multiplexing optical signal, data waveform information regarding the transmitter and transmits the data waveform information to at least one another transmitter provided for at least one another polarization multiplexing optical signal, and a second computing unit that receives data waveform information from the at least one another transmitter provided for the at least one another polarization multiplexing optical signal and pre-equalizes or reduces cross phase modulation occurring in the optical transmission line of a transmission signal based on the data waveform information received from the at least one another transmitter provided for the at least one another polarization multiplexing optical signal.. .
10/03/13
20130258293
Phase modulation module and projector comprising the same
An optical phase modulation module and a projector comprising the same are provided. The optical phase modulation module comprises a transparent thin film with an electro-optic effect, a plurality of first upper electrodes, a plurality of second upper electrodes and a plurality of lower electrodes.
09/26/13
20130250982
Generating ultrashort laser pulses based on two-stage pulse processing
Techniques and devices for producing short laser pulses, including generating ultrashort laser pulses by separating a nonlinear processing of laser pulses via nonlinear self-phase modulation (spm) in a nonlinear optical medium from a subsequent linear processing of the laser pulses to achieve ultrashort laser pulses.. .
09/19/13
20130243434
Optical communication system, optical communication method, optical communication device, and method and program for controlling the same
In order to perform the polarization demultiplexing of the polarization multiplexed bpsk signal using a small-scale circuit by means of optical phase modulation of the polarization multiplexed bpsk signal into the pseudo polarization multiplexed qpsk signal, an optical communication system for communicating by using polarization multiplexed optical signals includes an optical phase modulation means for modulating phases of a plurality of optical signals employing bpsk modulation system including information to be communicated, and for generating a plurality of optical signals to become signals by pseudo qpsk modulation system; and a signal restoration means for performing polarization demultiplexing of a plurality of polarization multiplexed optical signals from a plurality of optical signals modulated into the pseudo qpsk modulation system, and for restoring the information to be communicated.. .
09/19/13
20130242373
Light control device and light control method
A light control device 1 includes a light source 10, a prism 20, a spatial light modulator 30, a drive unit 31, a control unit 32, a lens 41, an aperture 42, and a lens 43. The spatial light modulator 30 is a phase modulating spatial light modulator, includes a plurality of two-dimensionally arrayed pixels, is capable of phase modulation in each of these pixels in a range of 4π or more, and presents a phase pattern to modulate the phase of light in each of the pixels.
09/12/13
20130234803
High-frequency, high-speed precision digital bi-phase modulator and method for bi-phase modulation
Embodiments of digital high-speed bi-phase modulator and method for bi-phase modulation are generally described herein. In some embodiments, the digital high-speed bi-phase modulator comprises a high-speed digital divider, a high-speed digital multiplexer, and matched signal paths provided between the divider and the multiplexer.
08/22/13
20130216007
Wireless communications device having temporary correlation matrix with time inversion and related methods
A wireless communications device may include a receiver configured to receive a continuous phase modulation (cpm) signal and a demodulator coupled downstream from the receiver. The demodulator may be configured to generate a cpm correlation matrix based upon an expected cpm signal, and generate a temporary correlation matrix.
08/22/13
20130215991
Three phase and polarity encoded serial interface
A high speed serial interface is provided. In one aspect, the high speed serial interface uses three phase modulation for jointly encoding data and clock information.
08/22/13
20130215730
Holographic memory reproduction device and holographic memory reproduction method, demodulation device and demodulation method, and observation device and observation method
The present invention relates to a reproduction device of a holographic memory capable of precisely reproducing multi-value phase information without being influenced by noise. This holographic memory reproduction device comprises: a hologram diffraction ray generation unit which irradiates a first reference ray to the holographic memory and generates a diffraction ray of the first hologram; a hologram generation unit which changes the phase of a second reference ray which may interfere with the diffraction ray of the first hologram and generates a second hologram from the diffraction ray of the first hologram and the second reference ray to which the phase has been changed; a detection unit which detects the intensity distribution of the second hologram; and a processing unit which demodulates the phase modulation signal or the space quadrature amplitude modulation signal on the basis of the intensity distribution..
08/22/13
20130215430
Suppression of quantization noise in a fiber-optic sagnac interferometer
In the case of a fiber-optic sagnac interferometer, the output of an analog/digital converter and thus output signals processed in a main control circuit as well as a phase resetting signal for a phase modulation encompass a first word width. An input of a digital/analog converter and thus a resetting signal, which acts on the phase modulator, encompasses a second word width, which is smaller than the word width, with which the resetting and modulation signal is computed.
08/15/13
20130209089
Constrained continuous phase modulation and demodulation in an optical communications system
A transmitter in an optical communications system includes a digital signal processor for processing a data signal to generate a sample stream encoding successive symbols in accordance with a constrained phase modulation scheme having a constellation of at least two symbols and a modulation phase constrained to a phase range spanning less than 4π. A digital-to-analog converter converts the sample stream into a corresponding analog drive signal.
08/15/13
20130208567
Phase modulation and noise minimization for simultaneous vibroseis acquisition
An embodiment of the invention includes simultaneous drive signals whose respective phase angle offset(s) varies over a portion or duration of the simultaneous sweeps. Other embodiments are discussed herein..
08/01/13
20130195222
Array amplitude modulation system and method
Array amplitude modulation which includes mapping a data symbol to a phase modulation signal and an amplitude modulation signal for transmission from antenna elements; applying the phase modulation signal to the antenna element amplifiers; and generating a pattern of enabling/disabling the antenna element amplifiers as a function of the amplitude modulation to produce a phase and amplitude modulated transmission from the antenna elements.. .
08/01/13
20130193897
Motor drive pwm rectifier having modulation scheme selector
A motor drive pwm rectifier includes a control section which generates the pwm signal in accordance with either a three-phase modulation scheme or a two-phase modulation scheme in which a pwm voltage command for one phase selected from among three phases each constituting the pwm voltage command in the three-phase modulation scheme is set and held at a level equivalent to a maximum value or minimum value of the pwm carrier and in which a pwm voltage command for the other two phases created by also applying an offset, required to achieve the setting, to the other two phases, a detecting section which detects three-phase ac current and outputs a detected current value, and a selecting section which selects the two-phase modulation scheme when the detected current value is larger than a first threshold value but smaller than a second threshold value, and otherwise selects the three-phase modulation scheme.. .
08/01/13
20130193755
Load balanced split-phase modulation and harmonic control of dc-dc converter pair/column for reduced emi and smaller emi filters
A novel circuit scheme and control includes a plurality of identical dc-dc converters with an optimal modulation/harmonic controller and a load balancing portion or process in an integral and systematic design methodology. The modulation/harmonic controller can be configured to control the individual modules in an optimal and coordinated way in the time domain so as to substantially reduce or eliminate a large amount of high-frequency input current harmonics, thus reducing emi, weight, and size and increasing redundancy.
07/25/13
20130188962
Communications device with discriminator for generating intermediate frequency signal and related methods
A communications device includes a transmitter device having an optical source to generate an optical carrier signal, and a first modulator coupled to the optical source and to modulate the optical carrier signal with a radio frequency (rf) input signal, and an optical waveguide coupled to the transmitter device. The communications device includes a receiver device coupled to the optical waveguide and including a second modulator to further modulate the modulated optical carrier signal with a local oscillator (lo) signal, a frequency modulation-phase modulation (fm-pm) discriminator coupled to the second modulator and to convert the modulated optical carrier signal to an intensity modulated optical carrier signal based upon the lo signal, and an optical-to-electrical converter coupled to the fm-pm discriminator and to generate an intermediate frequency (if) signal based upon the intensity modulated optical carrier signal..
07/11/13
20130176609
Optical phase modulation circuit and optical phase modulation method
To provide an optical phase modulation circuit and an optical phase modulation method capable of achieving a high-speed operation without increasing the power consumption. An optical phase modulation circuit according to the present invention includes an optical modulation unit 50 that includes a plurality of division electrodes 12 to 15 connected in tandem and generates a modulation signal by summing up optical signals modulated by using respective division electrodes, drive circuits 8 to 11 that drive the plurality of division electrodes, and a modulation timing control unit 60 that controls timings at which the optical signals are modulated in the plurality of division electrodes 12 to 15, by controlling an operation timing of the drive circuits 8 to 11..
06/27/13
20130165066
Unidirectional sampling mixer
A unidirectional sampling mixer utilizes a stepped phase modulation to shift the frequency of an rf input signal supplied to an rf input switch. An ordered set of phase shift values to be applied to the rf input signal and a set of times each element of which corresponds to a time at which a phase shift value is be applied to the rf signal are determined.
06/20/13
20130156129
Method and faculty to measure and compensate dco frequency distortions using a dpll
One embodiment of the present invention relates to a communication system having a digital to analog converter, a first input, a summation component, a compensation filter, and a compensation unit. The converter is configured to receive a first signal.
06/20/13
20130156083
Adaptive compensation of nonlinear frequency distortion in polar transmitters based on a least squares estimation
The present invention relates to a communication system having a digital to analog converter, a first input, a summation component, and a compensation unit. The converter is configured to receive a first.
06/20/13
20130155482
Optical modulation device and optical modulation method
In an optical modulation device, a first drive signal and a first bias signal are applied to a phase modulation unit, a second drive signal and a second bias signal are applied to a phase modulation unit, and a third bias signal is applied to a π/2 phase shift unit. A control unit adjusts the third bias signal in a first adjustment period, adjusts the first drive signal and the first bias signal in a second adjustment period next to the first adjustment period, and adjusts the second drive signal and the second bias signal in a third adjustment period next to the second adjustment period.
06/20/13
20130154756
Method for the phase modulation of a carrier signal transmitted from a transmitter to a contactless transponder, and device for implementing same
A method for phase modulation of a carrier signal from a transmitter to a contactless transponder in which data is coded as consecutive symbols, each corresponding to a predefined number of carrier cycles, and in which a symbol time is at least two cycles of the carrier signal includes, at the transmitter, spreading a phase jump of a symbol in relation to a preceding symbol over a first part of the symbol time. The establishment of the phase jump is completed in the first part of the symbol time.
06/13/13
20130148982
Chip-based advanced modulation format transmitter
In various embodiments, a monolithic integrated transmitter, comprising an on-chip laser source and a modulator structure capable of generating advanced modulation format signals based on amplitude and phase modulation are described.. .
06/06/13
20130142473
Optical device, optical deflection device, and optical modulation device
An optical device includes a phase modulation element having an optical waveguide part and electrodes, the optical waveguide part being configured such that a laser light beam emitted by a laser light source is inputted to the optical waveguide part and having an optical waveguide layer formed of an electro-optic material, the electrodes being provided on respective sides of the optical waveguide part to apply a voltage to the optical waveguide layer, the phase modulation element being configured to modulate a phase of the laser light beam by using a refraction index modulation region formed in the optical waveguide layer when a voltage is applied to the optical waveguide layer through the electrodes, and a pump light source configured to irradiate at least the refraction index modulation region of the optical waveguide layer with a pump light beam.. .
06/06/13
20130142286
Wireless communications device having waveform banks with frequency offset and related methods
A wireless communications device includes a receiver, and a demodulator coupled downstream from the receiver and configured to use a continuous phase modulation (cpm) waveform to non-coherently demodulate a received signal. The demodulator is configured to generate waveform banks, each waveform bank having a respective different frequency offset associated therewith, determine a correlation output metric for each waveform bank, select a waveform bank for demodulating the received signal based upon the correlation output metrics of the waveform banks, and demodulate the received signal using the selected waveform bank and the associated frequency offset..
05/23/13
20130128334
Beam steering device
An electrically variable lens comprising a variable fresnel lens and a variable phase corrector plate. A liquid crystal variable fresnel lens and liquid crystal phase corrector plate are varied in concert to compensate for wavefront discontinuities that would otherwise be produced by the fresnel lens.
05/16/13
20130121400
Adaptive radio controlled clock employing different modes of operation for different applications and scenarios
A configurable system and method for a radio controlled clock (rcc) receiver adapted to apply different strategies for extracting timing and time information from a phase modulated signal depending on the type of application the rcc is used in and on the reception conditions. The official time signal is broadcast from a central location using a modulation scheme which includes phase modulation that alternates between different information rates, allowing for multiple alternative reception modes that are suited for different ranges of signal-to-interference-and-noise-ratio (sinr).
05/16/13
20130121398
Timing and time information extraction from a phase modulated signal in a radio controlled clock receiver
A system and method for a radio controlled clock receiver adapted to extract timing and time information from a phase modulated signal. The official time signal is broadcast from a central location using the modified modulation scheme of the present invention, which adds phase modulation that allows for greatly improved performance.
05/16/13
20130121397
System and method for phase modulation over a pulse width modulated/amplitude modulated signal for use in a radio controlled clock receiver
A system and method for a radio controlled clock receiver adapted to extract timing and time information from a phase modulated signal. The official time signal is broadcast from a central location using a modified modulation scheme, which adds phase modulation over the legacy amplitude modulation, such as the legacy wwvb pulse width modulated (pwm)/amplitude shift keying (ask) modulation, thereby allowing for improved performance.
05/09/13
20130113293
Direct current to alternating current conversion utilizing intermediate phase modulation
The systems, methods, and devices of the various embodiments provide a power converter that modulates the voltage to follow the envelope of the phase output such that the current may pass through to the line. The systems, methods, and devices of the various embodiments may provide a two phase power converter that modulates the voltage to follow the envelope of the two phase output.
05/02/13
20130109338
Apparatus, system, and method for down converting and up-converting electromagnetic signals
Methods, systems, and apparatuses for down-converting and up-converting an electromagnetic signal. In embodiments, the invention operates by receiving an electromagnetic signal and recursively operating on approximate half cycles of a carrier signal.
04/25/13
20130101290
Method and apparatus to overcome linewidth problems in fast reconfigurable networks
In wavelength switching optical networks, the optical data being transmitted may be routed to different end points by switching the operating frequency of the laser. However, the phase noise of the laser source increases following a switching event.
04/25/13
20130100550
Implementing magnetic defect classification using phase modulation
A method, apparatus, and system are provided for implementing magnetic defect classification using phase modulation for hard disk drives. A magnetic media readback signal of a hard disk drive is processed to identify predefined phase modulation (pm) characteristics to implement magnetic defect classification of magnetic media bump and pit defects..
04/11/13
20130088767
Optical-path conversion device and imaging apparatus
An optical-path conversion device includes: a plate-shaped phase modulation mask in which a plurality of phase modulation parts are discretely formed for providing phase modulation to light passing through, and a first light-transmission part is formed for transmitting the light; and a plate-shaped light-shielding member in which a plurality of light-shielding parts are discretely formed for blocking the light, and a second light-transmission part is formed for transmitting the light, in which the phase modulation mask and the light-shielding member overlap each other at least in part, when viewed in an incident direction of the light, and at least one of the phase modulation mask and the light-shielding member is movable in an intersection direction which intersects with the incident direction.. .
04/04/13
20130084076
Method for optical phase modulation, optical phase modulator and optical network using the same
An optical phase modulator based on the principles of stimulated brillouin scattering is disclosed. The optical phase modulator uses a pump wave and a probe wave counte-propagating in an optical fiber, whose frequencies are chosen such that a difference thereof differs from a resonant brillouin frequency of the optical fiber.
04/04/13
20130084072
Optical reception apparatus and optical network system
An optical apparatus includes a dispersing medium configured to receive carrier light which has been subjected to phase modulation in accordance with subcarrier modulation signals which has been modulated using data signals, and a signal extractor configured to extract the data signals from light output from the dispersing medium.. .


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Phase Modulation topics: Phase Modulation, Modulation, Transmitter, Control Unit, Communication System, Carrier Frequency, Amplification, Communications, Transmitting And Receiving, Multiplexing, Power Management, Telecommunication, Telecommunication System, Extinction, Optical Communication System

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