|| List of recent Center Frequency-related patents
|Reducing transmission signal artifact spacing|
A method of generating a transmission signal may include mixing a baseband signal assigned for transmission within a narrow frequency range (“assigned narrow frequency range”) included in a wireless communication channel to produce a shifted signal. The shifted signal may have a shifted frequency that is based on a shift from the assigned narrow frequency range toward a center frequency of the wireless communication channel by a frequency offset.
|Multi-band interference optimization|
Rf communications circuitry, which includes a first rf filter structure and control circuitry, is disclosed. The first rf filter structure includes a pair of weakly coupled resonators and a first tunable rf filter.
|Orthogonal modular embedded antenna, with method of manufacture and kits therefor|
A system and method are disclosed which may comprise a composite resonating antenna structure which may comprise: a first substrate comprising a first portion of a flexible substrate comprising a first conductive layer forming a first resonating element on the first portion of a flexible substrate; a second substrate connected to a second portion of the flexible substrate to form a transition, with the first portion of the flexible substrate and the second substrate generally orthogonal to each other; and a second conductive layer attached to a third substrate, the second conductive layer shaped to include a ground plane section and a signal transmission line carrying microwave frequency signals including a center frequency; wherein the first resonating element radiates a frequency equal to the center frequency based on first portion of the flexible substrate and the third substrate being generally orthogonal to each other.. .
|Locking system for detecting and tracking the center frequency of absorption lines in gases|
A method to detect a gas absorption line that includes alternately transmitting and sweeping two radio frequency (rf) signals through an absorption cell, wherein the two rf signals are transmitted at different frequencies separated by a range and are swept across a span of frequencies in a microwave and millimeter wave regions of a frequency spectrum. Receiving the rf signals by a receiver and analyzing the received signals by a closed loop system for relative absorption by a gas due to an absorption line of the gas in the span of the swept frequencies.
|Variable frequency iteration mppt for resonant power converters|
A method of maximum power point tracking (mppt) uses an mppt algorithm to determine a switching frequency for a resonant power converter, including initializing by setting an initial boundary frequency range that is divided into initial frequency sub-ranges bounded by initial frequencies including an initial center frequency and first and second initial bounding frequencies. A first iteration includes measuring initial powers at the initial frequencies to determine a maximum power initial frequency that is used to set a first reduced frequency search range centered or bounded by the maximum power initial frequency including at least a first additional bounding frequency.
|Motor control device for suppressing natural vibrations|
A frequency component extracting unit (15) extracts a frequency component included in a control signal at a first frequency step size. A frequency detection unit (16) detects, from the extracted frequency component, a frequency corresponding to a natural frequency of a target object constituted of a motor (3) and a driven member (4).
|Jammer resistant noise cancelling receiver front end|
Techniques for providing a jammer-resistant noise-cancelling receiver front end with band-pass impedance matching and good power efficiency. In an aspect, the center frequency of the band-pass impedance matching advantageously tracks the local oscillator frequency.
|Dynamically detecting resonating frequencies of resonating structures|
There is described herein a real-time scheme, implementable in software, hardware, or a combination thereof, to detect a resonating frequency of a structure from a sensed signal and dynamically set the center frequency of an adaptive compensator for effective attenuation of the resonating frequency.. .
|Meta-meterial vibration energy harvester|
A meta-material vibration energy harvester includes a housing element encapsulating a multiplicity of oscillators capable of harvesting a significant percentage of the total mechanical energy diffusely distributed throughout the vibrating structure, the harvester design resulting in a rapid transfer of mechanical energy entering it via the housing element from the element to the oscillators wherein the energy remains trapped while accumulating over an extended time, the percentage of energy transfer primarily depending on the ratios of the sum of the oscillator masses to the sum of the housing mass and of the measure of the mass of the vibrating structure and of the width of the band spanned by the oscillators to its center frequency, both the relevant measure of the vibrating structure mass and the values of the mass and frequency ratios that maximize the percentage of internal energy transfer depending on the harvesting scenario.. .
|Method to optimize the communication parameters between an access point and at least one client device|
A method to optimize the communication on a channel between an access point and at least one client device, said channel being characterized by a center frequency and a bandwidth, comprises: establishing a connection on a first channel according to a first center frequency and a first bandwidth; exchanging data through this first channel between the access point and the client device; monitoring a first interference level on the first channel; the access point, while the data are exchanged, executes: informing the client device to switch to a second channel having a different center frequency and/or a different bandwidth; determining a second interference level on the second channel; comparing the first interference level with the second interference level; deciding to switch back or keep the second channel based on the comparison.. .
|Flat-top tunable filter|
A tunable plc optical filter having sequentially connected thermally tunable mach-zehnder (mz) interferometers is described. The cascade of mz interferometers, each having a free spectral ranges matching itu frequency grid spacing, are tuned so as to have a common passband centered on the frequency of the signal being selected, while having at least one of the stopbands centered on any other itu frequency.
|Millimeter-wave band spectrum analysis device and analysis method|
An input signal sx in a first millimeter-wave frequency band higher than 100 ghz is input to a millimeter-wave band filter 20 in which a pair of radio wave half mirrors 30a and 30b so as to opposite to each other and which performs a resonance operation. A signal component sa corresponding to the resonance frequency of the filter is extracted, is mixed with a first local signal l1 with a fixed frequency, and is converted into a signal in a second frequency band.
|Extremely high frequency (ehf) distributed antenna systems, and related components and methods|
Extremely high frequency (ehf) distributed antenna systems and related components and methods are disclosed. In one embodiment, a base unit for distributing ehf modulated data signals to a rau(s) is provided.
|Galvanically isolated, directional coupler|
A galvanically isolated, directional coupler, especially for in- and out-coupling of high-frequency measurement signals of a radar fill-level measuring device, wherein two mutually engaging, oppositely bent, conductive traces are provided, wherein the two oppositely bent, conductive traces are so arranged that that they couple with one another over a region of a quarter wavelength (λ/4) of the wavelength associated with the center frequency of the measuring signals and form two groups of laterally coupled, conductive traces, and wherein curved conductive trace portions adjoin each of the two groups of laterally coupled, conductive traces, in each case, over a region, which is less than an eighth wavelength (λ/8) of the wavelength associated with the center frequency.. .
|Methods and apparatuses for the detection of incontinence or other moisture, methods of fluid analysis, and multifunctional sensor systems|
One embodiment of a method of interrogating a sensor to detect the presence of moisture on an occupant support comprises the steps of a) providing a moisture responsive sensor in a surveillance zone of the occupant support, the sensor being tuned to a center frequency; b) exciting the sensor with an electromagnetic signal having a frequency approximately equal to the center frequency; c) monitoring for a center frequency response from the sensor; d) comparing the center frequency response to an expected center frequency response; and e) if the center frequency response compares favorably to an expected center frequency response, issuing a first output consistent with the favorable comparison.. .
|Fat fraction estimation using ultrasound with shear wave propagation|
Fat fraction is estimated from shear wave propagation. Acoustic radiation force is used to generate a shear wave in tissue of interest.
|Spread-spectrum apparatus for voltage regulator|
Described is an apparatus for providing spread-spectrum to a clock signal. The apparatus comprises: an oscillator to generate an output clock signal, the oscillator to receive an adjustable reference signal to adjust frequency of the output clock signal; a first circuit to provide a first signal indicative of a center frequency of the output clock signal; a second circuit to generate a switching waveform to provide spread-spectrum for the output clock signal; and a third circuit, coupled to the first and second circuits, to provide the adjustable reference signal according to the first signal and the switching waveform..
|System and method for energy efficient measurement of sensor signal|
A method for improving robustness of a capacitive sensor system has the following steps: a) operating the capacitive sensor system, wherein received sensor signals are filtered by a band-pass filter having a band-pass having a first center frequency; b) polling sensor data at a first rate using the sensor system; c) determining whether a polled sensor value is meeting a predetermined threshold; d) if the predetermined threshold is met: d1) polling sensor data at a second rate being higher than the first rate using the sensor system; d2) verifying that sensor data polled at the second rate are consistent; d3) if the sensor data polled at the second rate are inconsistent, then repeating at least step d2) wherein said band-pass filter is controlled to have a second center frequency.. .
|Radar false alert reduction|
A radar detector suppresses alerts from vehicle guidance systems, by sweeping for a consistent radar signal; the center frequency of the signal is stored and the detector suppresses warnings of radar signals near that frequency. The detector uses an enhanced method for suppression of signals near a known location of a false signal source; in the event the detector detects a radar signal and finds a matching stored false signal, the detector will first compare the strength of the received signal to a threshold strength that is computed based upon the distance of the detector from the stored false signal, and will only suppress signals below threshold.
|Logarithmic amplifier with universal demodulation capabilities|
A logarithmic amplifier (lda) is described that includes an amplifier configured to oscillate a modulated input signal, a feedback establishing a 180 degree phase shift between the amplifier input and the output and maintaining oscillation of the input signal, a parallel resonant circuit connected to the amplifier output causing the amplifier to resonate at or around a center frequency, and a controller connected to the amplifier input cyclically terminating oscillation of the input signal each time a pre-determined threshold of current is detected, the controller including a low pass filter configured to generate a second output signal having a repetition frequency. The lda may be used for am with or without a pll and/or a superhetrodyne.
|Ultrasound diagnostic imaging apparatus|
Disclosed is an ultrasound diagnostic imaging apparatus including an ultrasound probe which outputs transmission ultrasound toward a subject due to a pulse signal being input and which outputs a received signal by receiving reflected ultrasound from the subject, and a transmission unit which makes the ultrasound probe generate the transmission ultrasound by outputting a pulse signal whose drive waveform is formed of rectangular waves. The frequency power spectrum of the pulse signal has intensity peaks in a frequency band included in a transmission frequency band at −20 db of the ultrasound probe on a low frequency side and a high frequency side of a center frequency of the transmission frequency band, respectively, and intensity of a frequency region between the intensity peaks is −20 db or greater with a maximum value of intensity among the intensity peaks being a reference..
|Apparatus and methods of frequency spectrum usage in a wireless communication system|
Techniques of frequency spectrum usage in a wireless communication system include configuring two or more downlink carriers, each having a downlink carrier center frequency, to have a total occupied bandwidth that is constrained within an allocated downlink frequency spectrum. Further, the techniques include transmitting, to a user equipment (ue), two or more downlink carrier center frequency indicators that each identify a downlink carrier center frequency of each of the two or more downlink carriers.
|Method and system for adaptive coding and modulation (acm) for supporting mesh network connectivity for multipoint networks|
A method of provisioning a communications link between remote terminals within a hub-spoke network comprising receiving, by a first remote terminal, information about a second remote terminal from a hub, selecting, by the first remote terminal, a modulation factor, coding rate, symbol rate, center frequency, and power level based on the information received about the second remote terminal, transmitting, by the first remote terminal, a signal using at least one of the selected modulation factor, coding rate, symbol rate, center frequency, and power level, to the second remote terminal such that a communications link is created, and adjusting the modulation factor, coding rate, symbol rate, center frequency, or power level of the transmitted signal such that performance of the link is increased while maintaining a presence of the link.. .
|Magnetic resonance imaging apparatus and magnetic resonance imaging method|
In one embodiment, an mri apparatus (10) includes a gap calculating unit (65), a candidate calculating unit (66) and a sequence setting unit (61). The gap calculating unit calculates a gap between the center frequency of an rf pulse and a resonance center frequency, after start of a pulse sequence.
|Optical signal processing apparatus, transmission apparatus, and optical signal processing method|
An optical signal processing apparatus includes: an optical frequency comb generation unit configured to generate an optical frequency comb; an extraction unit configured to extract a plurality of optical components having a certain frequency interval between the optical components from the optical frequency comb; and an optical carrier generation unit configured to multiplex the plurality of optical components with reference light to thereby generate an optical carrier having a center frequency away from the center frequency of the reference light by an integer multiple of the frequency interval.. .
|Magnetic resonance imaging apparatus|
A magnetic resonance imaging apparatus of an embodiment includes: an imaging condition setting section configured to set an imaging condition for a main scan, a preparatory scan performing section configured to repeat a preparatory scan to be performed by the use of the imaging condition for a main scan and a changeably inputted center frequency so as to generate a preparatory image in real time, a display section on which the preparatory image can be displayed in real time, an optimum center frequency setting section configured to change the center frequency so as to change a situation in which a banding artifact appears and configured to set an optimum center frequency according to a user operation based on an observation of the preparatory image, and a main scan performing section configured to reconstruct an image for a diagnosis by using the optimum center frequency having been set.. .
|Dual-band antenna of wireless communication apparatus|
A dual-band antenna of a wireless communication apparatus includes a first radiation part for receiving or transmitting signals at a first frequency band; a second radiation part for generating a coupling effect together with the first radiation part to receive or transmit signals at a second frequency band having a center frequency lower than a center frequency of the first frequency band, wherein the second radiation part comprises multiple radiation sections, and at least one of the multiple radiation sections is positioned on a first plane; a feeding element for coupling with a signal receiving terminal of the wireless communication apparatus; and a shorting element for coupling with a fixed-voltage region of the wireless communication apparatus. The first radiation part does not physically contact with the second radiation part, and at least a portion of the first radiation part is not positioned on the first plane..
|Tunable filter devices and methods|
Analog interference filter devices and methods for isolation of desirable portions of a radio frequency signal. Signal compensation is used to provide desirable center frequency, passband width, ripple, rolloff, stopband and distortion performance.
|Method for designing band pass delta-sigma modulator, band pass delta-sigma modulator, signal processing device, and radio transceiver|
F0 is a center frequency of a quantization noise stop band of the band pass delta-sigma modulator.. .
|Communication device and communication system|
A transmitter includes a generation section that generates a baseband ofdm signal based on transmission data, and a transmission section that transmits a communication signal that is based on a real-part signal that is obtained by removing an imaginary-part signal from the baseband ofdm signal. In the baseband ofdm signal, the data signal including the transmission data is superimposed on subcarriers that are given numbers equal to or less than n/2−1, and the data signal is not superimposed on subcarriers that are given numbers more than n/2−1, where n (n is an integer) subcarriers included in the baseband ofdm signal are numbered by integers from 0 to n−1 in ascending order with respect to the center frequency of each subcarrier..
|Method and system for frequency reuse in wireless relay scenario|
The disclosure provides a method for frequency reuse in a wireless relay scenario, wherein a center frequency spectrum, an edge frequency spectrum and a random access frequency spectrum are pre-allocated to a cell according to a scenario parameter in the cell; load conditions of all mobile stations (mss) covered by each relay station (rs) in the cell is calculated and reported to a base station (bs); the bs allocates the random access frequency spectrum to an rs according to load conditions of all rss and schedules mss. The disclosure also provides a system for frequency reuse in a wireless relay scenario.
|Synthetic aperture image reconstruction system in a patient interface module (pim)|
A field programmable gate array (fpga) circuit including a quadrature internal conditioning circuit is provided. The circuit having a buffer circuit; and a reconstruction engine circuit, wherein the reconstruction engine circuit includes: a circuit to measure a phase of a signal; and a flavor interpolation circuit; wherein: the circuit to measure the phase of a signal includes digitization points forming two complex numbers for each cycle of the center frequency of the signal.
|Systems and method to substantially mitigate ac stark shift effects in a sensor system|
One embodiment includes a sensor system. The system includes a cell system comprising a pump laser configured to generate a pump beam to polarize alkali metal particles enclosed within a sensor cell.
|Bonded pseudo hemispherical beam operation for spot beam environments|
A method of creating a pseudo hemispherical beam using a plurality of individual spot beams comprising receiving by a single router or packet processor, user data from a plurality of users, processing the user data by the single router or packet processor using a qos logic such that a single output comprising a plurality of queues of data results, each queue of data comprising data designated for transmission only to one or more predetermined remote receivers, modulating the plurality of queues of data received using a multiple-carrier modulator such that a single output comprising a plurality of individual spot beams results, wherein each individual spot beam has a unique center frequency and carrier signal configuration, and transmitting the plurality of individual spot beams to a repeating relay configured to transmit each individual spot beam to the one or more predetermined remote receivers.. .
|Methods of processing a radio frequency signal, signal processing devices for carrying out the methods, radio frequency front-ends, radio receivers and gnss receivers|
A radio frequency signal is frequency-translated to form a complex first intermediate signal where a frequency corresponding to a gps center frequency is at an intermediate frequency. In a multiplexing conversion unit a complex multiplexed conversion signal which assumes different conversion frequencies is derived from a clock signal where the frequency of the latter is divided alternately by one of two divisors in a divider circuit and further by two in a phase shifter.
|Automatic center frequency and span setting in a test and measurement instrument|
A test and measurement instrument having initial display center frequency and span settings and configured to process an input signal is disclosed. The test and measurement instrument includes a processor configured to digitize the input signal and locate a primary peak and determine a primary peak center frequency of the input signal.
|Method, system and program product for detecting wireless interferers|
A method, system and program product comprise generating spectral samples from at least one radio communication device being configured to be operable as an observer of transmissions within a frequency band divided into one or more sub-bands associated with communications of the radio communication device. The spectral samples at least comprise signal levels and timing information for observed signals within the sub-bands.
|Iphone frequency sensor/magnifier application|
Devices, using emitted acoustic signals and received vibrations, determine resonant frequencies of a surface or other object, and determine useful information about that surface, including size, thickness, and material. Received vibrations include impulse vibrations from striking that surface with a finger or stylus, or from a frequency or from a swept-sinusoid emitted by the device.
|Systems and methods for measuring high frequency resistance in a fuel cell system|
System and methods for measuring operating parameters of a fuel cell system are presented. In certain embodiments, the systems and methods may be configured to measure a high frequency resistance of a fuel cell system.
|Wireless communication device and wireless communication method|
A wireless communication device includes a wireless communication module and an allocator. The wireless communication module wirelessly communicates with a plurality of other wireless communication devices.
|Communication device and communication system|
A preamble signal is an ofdm signal, and is a real-part signal obtained by removing an imaginary-part signal from a signal in the time domain that is generated by an ifft process being performed on a signal in the frequency domain obtained by assigning preamble data to subcarriers in accordance with a predetermined arrangement pattern. The predetermined arrangement pattern indicates that preamble data is assigned to any of subcarriers given numbers equal to or less than n/2−1 and the preamble data is not assigned to subcarriers given numbers more than n/2−1, where a plurality of subcarriers are numbered by integers from 0 to n−1 (n is an integer) in ascending order with respect to the center frequency of each subcarrier..
|Elastic wave device|
A reflector of the elastic wave resonator in an elastic wave device has first and second regions. The second region has third and fourth regions.
|Dynamic operating bandwidth configuration for an envelope tracker|
A communication device, such as a smart phone, receives operational parameters from a network controller. The operational parameters may include, as examples, bandwidth allocation, center frequency, and receive/transmit band assignments.
|Method for performing a cooperative operation between heterogeneous networks and device for same|
The present invention relates to a method for performing a cooperative operation between heterogeneous networks and a device for same. A method for a first type base station to perform a cooperative operation between heterogeneous networks in a wireless communication system includes receiving a downlink synchronization channel from at least one second type base station; obtaining an identifier (id) of the second type base station by using the received downlink synchronization channel; and transmitting at least one of a channel number and a bandwidth of a center frequency of the first type base station and the cell id of the second type base station to a server.
|Glass antenna for vehicle|
A glass antenna provided on vehicle side glass has a power feeding portion disposed at side portion of the side glass, a main element connected to the power feeding portion and a square bracket-shaped element whose one end is connected to some midpoint of the main element. When frequency band of fm broadcast wave received by the antenna is divided into two frequency bands with respect to its center frequency, wavelength of center frequency of frequency band of low frequency is λ, and wavelength of center frequency of frequency band of high frequency.
|Method for measuring mechanical resonance frequency using servo driver|
A method of measuring mechanical resonance frequency using a servo driver including the steps of: having the servo driver work under a torque control mode, by applying in the servo driver a preset torque drive signal, the motor drives the mechanical components in a microvibration state; collecting actual speed signals of the motor to obtain the actual speed signal sequence of the motor; the actual speed signal sequence of the motor being passed in sequence through a certain number of band-pass filters having a fixed pass-band frequency and different center frequencies to obtain filtered speed signals; the filtered speed signal sequences output from each of the band-pass filters being changed into absolute values and then accumulated to obtain accumulation values; comparing the accumulation values obtained from the signal sequences output from the certain number of band-pass filters, and the center frequency of the band-pass filter corresponding to the largest accumulation value being the mechanical resonance frequency. By using the method, an automatic measurement of the mechanical resonance frequency of a mechanical device can be achieved..
|Single-cable automatic ird installation procedure|
A method, apparatus, system, and computer program product for auto-installing an integrated receiver/decoder (ird) includes issuing an auto-installation command from the ird to an outdoor unit (odu) and receiving a plurality of tones from the odu in response to the auto-installation command, each tone representing a center frequency of available user bands (ubs). The auto-installation also includes acquiring a ub center frequency by the ird, requesting the odu to confirm a ub number corresponding to the acquired ub center frequency, and receiving confirmation from the odu that a ub number corresponds to the acquired ub center frequency.
|Frequency tunable transmit/receive (tx/rx) antenna switch|
A frequency tunable transmit/receive (tx/rx) antenna switch uses a tuned pin diode rf switch topology (e.g. Shunt, series or series-shunt).
|Magnitude and phase response calibration of receivers|
An integrated calibrator provides for magnitude and phase response calibration of rf receivers to produce amplitude flatness and phase linearity across the frequency range of the rf receiver by using a simple square law diode detector and a frequency-stepped two-tone source. A two-tone source generator provides two sinusoidal signals separated by a specified frequency delta about a center frequency.
|Compact broadband impedance transformer|
The present invention is directed to an impedance transformation device for use in a system having a characteristic system impedance, the device being characterized by a predetermined bandwidth having a center frequency. The device housing size is one-eighth wavelength of the center frequency.
|Variable band pass filter device|
A variable filter device has: a first series arm which is serially connected to a signal line, includes a variable capacitance and an inductance, and constitutes a series resonator; first and second parallel arms, which are connected between the signal line and the ground on both sides of the first series arm, each of which includes a variable capacitance and an inductance, and constitutes a grounded series resonator. The first series arm defines the center frequency of the pass band, and the first and second parallel arms define attenuation poles sandwiching the pass band..
|On-chip optical reference cavity exhibiting reduced resonance center frequency fluctuations|
An optical apparatus comprises a waveguide substrate and an optical reference cavity. The optical reference cavity comprises an optical waveguide formed on the waveguide substrate and arranged to form a closed loop greater than or about equal to 10 cm in length.
|Method and apparatus of accessing channel in wireless communication system|
A method and apparatus of accessing a channel including receiving, by a device, an operation element for setting up or switching at least one channel from an access point (ap), the operation element including a channel type field indicating whether the at least one channel is either a single channel or multiple channels, and including two channel center frequency segment fields indicating a channel center frequency of a primary and a secondary channel if the channel type field indicates that the channel is multiple channels, determining whether the primary channel is idle during a first interval, determining whether the secondary channel is idle during a second interval if the primary channel is idle, and transmitting data by using the primary and secondary channels to the ap or at least one station in a basic service set (bss) if the primary and secondary channel are idle.. .
|Optical channel monitor|
In one example, an optical channel monitor includes a tunable filter, a deinterleaver, first and second optical receivers, and a control module. The tunable filter is configured to receive an optical signal having a plurality of channels spaced at a nominal channel spacing.
|Optical channel monitor|
In one example, an optical channel monitor includes a tunable filter, a deinterleaver, first and second optical receivers, and a control module. The tunable filter is configured to receive an optical signal having a plurality of channels spaced at a nominal channel spacing.
|Associative memory oscillator array|
An embodiment of the invention includes an analog associative memory, which includes an array of coupled voltage or current controlled oscillators, that matches patterns based on shifting frequencies away from a center frequency of the oscillators. The test and memorized patterns are programmed into the oscillators by varying the voltage or current that controls the oscillators.
|Systems and methods for collision avoidance in near-field communications|
Systems, methods, and devices for wireless communication are included herein. An aspect of the subject matter described in the disclosure provides a device configured to detect a transmission.
|Full-range pilot-assisted frequency offset estimation for ofdm communication systems|
A training symbol with two identical halves as well as a pilot-tone at a center frequency is used for both timing synchronization and carrier frequency offset estimation. A timing synchronization is achieved by finding a peak of a cross-correlation function of the two halves in the first symbol.
|Apparatus and method for tuning the frequency of a bandpass filter to an offset frequency around a carrier frequency|
A novel frequency locked loop for tuning a bandpass filter to a small offset frequency around an rf center frequency is provided. The difference between the bandpass filter frequency and the rf center frequency is generated, a frequency locked loop is used to tune the frequency difference to a reference offset frequency..
|Methods and systems for conditioning a physiological signal using an adjustable bandpass filter|
A physiological monitoring system may determine physiological information, such as physiological rate information, from a physiological signal. The system may apply a bandpass filter to the physiological signal to assist in the determination of the physiological information.
A mobile terminal including a terminal body; a display configured to display information; and an antenna device mounted in the terminal body. Further, the antenna device includes a first conductive member including a shape such that the antenna device resonates at a first frequency band; a second conductive member diverging from the first conductive member, and extending by a prescribed length; and a ground member spaced apart from the second conductive member, and capacitive-coupled to the second conductive member, such that a frequency resonance added by the second conductive member is generated near a center frequency of the first frequency band..
|Signal tracking and antenna positioning system|
Embodiments disclosed herein relate to a communication system. Particularly disclosed are systems and methods for locating and tracking radio frequency signals and for automatically positioning an antenna to receive a desired radio frequency signal.
|Matching network for transmission circuitry|
The present disclosure relates to transmission circuitry of a wireless communication device. The transmission circuitry includes power amplifier circuitry, an output matching network, and impedance control circuitry.
|Cueing system for universal optical receiver|
A universal optical receiver may include an optical channel monitor configured to acquire spectral data for an optical signal on at least one selected optical channel, a tunable local oscillator configured to be tuned to a center frequency of the optical signal on the at least one selected optical channel, a storage device configured to store data associated with the optical signal responsive to acquisition of the spectral data and tuning of the tunable local oscillator, and processing circuitry configured to execute an algorithm that employs a plurality of binary distinctions based on physical characteristics of the optical signal and employs at least one calculation of figure of merit associated with a series of parameter values of the optical signal to identify a format of the optical signal.. .
|System and method for a power amplifier|
In accordance with an embodiment, a system includes a first amplifier and a first bandpass filter having an input coupled in series with an output of the first amplifier, and an output configured to be coupled to a load. The bandpass filter has a lower input impedance at an in-band center frequency than at out-of-band frequencies, and the first amplifier is configured to receive a pulse width modulated waveform filtered according to a first transfer function that attenuates sidebands of the pulse width modulated waveform..
|Digitally controlled spur management technique for integrated dc-dc converters|
And frf is center frequency of a received channel. None of the harmonics of the clock frequency (fs+Δf) is present in a channel of interest.
|Apparatus and method for ultra wideband communication using dual band pass filter|
An apparatus and method for ultra wideband (uwb) communication, using a dual band pass filter (bpf) is disclosed. The uwb communication apparatus may include a first bpf performing a first band pass filtering with respect to a uwb signal, a second bpf that has a center frequency differing from a center frequency of the first bpf, and performs a second band pass filtering with respect to the uwb signal, a first envelope detector that detects a size of a first signal filtered in the first bpf, a second envelope detector that detects a size of a second signal filtered in the second bpf, and a demodulator that demodulates a uwb signal, using the size of the first signal and the size of the second signal..
|Full duplex system with self-interference cancellation|
An apparatus and method enable a full duplex system with self-interference cancellation. Receiving circuitry forming a signal receiving path is arranged for transferring communication signals received via air interface.
|Channelization method in whitespace band and apparatus for the same|
A wireless communication system is disclosed. Specifically, a channelization method in a whitespace band and an apparatus for the same are disclosed.