57 results about "RF front end" patented technology

The invention relates to the technical field of particle accelerators, in particular to a transverse feedback system with a switchable excitation direction and a control method thereof, and the system comprises a beam position detector BPM which is used for measuring a beam signal; the RF front end is used for receiving the beam signal sent by the beam position detector BPM and carrying out amplification and filtering processing; the ADC module is used for converting the beam signal into a digital signal; the digital signal processing module is used for carrying out digital signal processing calculation to obtain an excitation signal; the DAC module is used for carrying out digital-to-analog conversion; the power divider is used for adjusting the phase of the excitation signal; the exciter comprises four Kickers with electrodes, a power amplifier, a low-pass filter and a matched load and is used for applying a transverse excitation signal to the beam current, and the problems that in the prior art, a transverse feedback system Kicker occupies a large longitudinal space, the system is complex, and precision and efficiency are low are solved.

A receiver includes an antenna block configured to transduce impinging electromagnetic signals into electrical signals; a signal conditioning block configured to condition electrical signals received from the antenna block; and a down-converter block configured to down-convert conditioned electrical signals received from the signal conditioning block. The down-converter block comprises a plurality of signal channels. The receiver further includes a plurality of analog-to-digital converters (ADCs) respectively connected to the signal channels of the down-converter block; and a field-programmable gate array (FPGA). The FPGA is configured to program the down-converter block by selecting a set of mixer frequencies and a set of bandwidths designed to remove interference signals in each signal channel. The selections are calculated to mitigate reductions in dynamic range in the ADCs due to interference. The FPGA is further configured to process digital signals received from the ADCs after the down-converter block has removed the interference signals.

The present disclosure provides a method and a system to estimate LO leakage and quadrature error parameters for a transmitter RF front end, such as a direct up-conversion transmitter RF front end, in a joint fashion. The proposed method utilizes a PN sequence inserted at the transmitter baseband. At the observation receiver side, an RX accumulator is implemented to sum receiver signals to take advantage of a despreading gain using the same PN sequence from transmitter side. Through the despreading process, the receiver-transmitter channel may be estimated and used to extract the quadrature error parameters. The estimated channel may also be used to eliminate user data interference presented within the RX accumulator output, which may further be used to compute the LO leakage.

An antenna system for radio mobile communications in vehicles having at least one remote antenna module connected with a cable to a central control unit; the remote antenna module having: a plurality of radiant elements, an RF front end and a control interface; the central control unit having: a signal processor, and a control interface; the control interface of the remote antenna module and the control interface of the central control unit are suitably configured for transmitting the input / output data signals and the control signals over the cable in order to control the control interface and the RF front end of the remote antenna module.

The present invention discloses a multi-channel low-error RF strip coupling position detection method and system, the method comprising: connecting multiple RF strip coupling probes of a measurement system through a beryllium copper conductor to excite the RF signal, each RF strip coupling probe connection can excite the generation of four groups of RF signals, the four groups of RF signals are sent to their respective RF front ends to achieve filtering, gain adjustment, and down-conversion, the down-converted signal is an intermediate frequency signal, and is sent to an AD data collector, the AD data collector works under the drive of a synchronous clock separated from a signal source, and ensures that all the system acquisitions are phase referenced acquisitions. According to the principle of electromagnetic induction, a RF strip coupling probe is used to couple four RF signals, and accurate signal amplitude and phase information are extracted from the four RF signals to accurately obtain the position of the strip electrode relative to the beryllium copper wire, and then the deformation information of the connected low-temperature cavity to be measured is inverted.

The invention relates to a radio frequency front end, a radio frequency front end control method and device and a storage medium. The radio frequency front end comprises a multi-mode multi-frequency-band power amplifier, a first frequency band, a second frequency band and a third frequency band, the first frequency band, the second frequency band and the third frequency band support carrier frequency bands supported by a long-term evolution network, the highest frequency of the first frequency band is smaller than a first frequency threshold, the lowest frequency of the third frequency band is larger than a second frequency threshold, and the frequency of the second frequency band is larger than that of the first frequency band. The frequency is smaller than that of the third frequency band; the transmitting module supports receiving and transmitting of corresponding radio frequency signals through an antenna; a multi-path antenna, each path of antenna in the multi-path antenna supports receiving and transmitting of a first radio frequency signal, a second radio frequency signal and a third radio frequency signal, and carrier frequency bands occupied by the first radio frequency signal, the second radio frequency signal and the third radio frequency signal are a first frequency band, a second frequency band and a third frequency band respectively; and the switch module is used for controlling at least one antenna in the multiple antennas to be connected with the transmitting module so as to support the combination of different carrier frequency bands.

A clamping circuit that may be used to provide efficient and effective voltage clamping in an RF front end. The clamping circuit comprises two series coupled signal path switches and a bypass switch coupled in parallel with the series coupled signal path switches. A diode is coupled from a point between the series coupled signal path switches to a reference potential. In addition, an output selection switch within an RF front end has integrated voltage clamping to more effectively clamp the output voltage from the RF front end. Additional output clamping circuits can be used at various places along a direct gain signal path, along an attenuated gain path and along a bypass path.

In one aspect, a method comprises: comparing, in a comparator, a signal level of a receive radio frequency (RF) signal to a first threshold, the receive RF signal obtained from a controllable location in an RF front end circuit; and in response to the signal level of the receive RF signal exceeding the first threshold, causing the RF front end circuit to be reconfigured from a first mode in which an input to a low noise amplifier (LNA) is coupled an antenna to a second mode in which the input to the LNA is coupled to an RF filter.

Systems, methods, processors, and circuitries are provided for an ambient IoT system. In one example, a carrier wave node device of an ambient IoT system includes radio frequency (RF) front end circuitry and a processor. The processor is configured to, when executing instructions stored in a memory, determine one or more carrier wave frequencies associated with a configured device-to-reader (D2R) channel of an ambient IoT system bandwidth; and control the RF front end circuitry to transmit a carrier wave having frequency components corresponding to the one or more carrier wave frequencies.

The present invention relates to a method and apparatus for reducing power consumption in a receiver of a time slotted communication system. An RF front end has power applied after the start of a preamble or after the start of a header, or upon the start of a packet payload based on connection status, signal level, and interference level. Where the signal level is constant, the communication system is in a connected state, and the interference level is low, the system bypasses packet header destination address matching, or optionally, uses only the least significant bits of the header destination address for matching purposes.

The disclosure relates to suppression of interference in radar systems by dechirping, filtering and rechirping incoming signals. Example embodiments disclosed include a method of removing interference from a radar signal, comprising: receiving an incoming radar signal (y(t)) at an antenna (101); providing the incoming radar signal (y(t)) to an RF front end module (102); the RF front end module (102) amplifying and converting the incoming radar signal to a baseband signal (yl(t)); providing the baseband signal (yl(t)) to an analog- to-digital converter, ADC (103); the ADC (103) digitising the baseband signal (yl(t)) to generate a digital baseband signal (yl[u]); providing the digital baseband signal (yl[u] ) to a dechirping module (104, 105); the dechirping module (104, 105) estimating chirp parameters of the digital baseband signal (yl[u]) and dechirping the digital baseband signal (yl[u]) to generate a dechirped signal (yd[u]); providing the dechirped signal (yd[u]) to a filter module (106); the filter module (106) filtering out an interference signal from the dechirped signal (yd[uj) to generate a filtered signal (yf[u]); providing the filtered signal (yf[u]) to a rechirping module (107); the rechirping module (107) rechirping the filtered signal (yf[u]) with chirps generated from the estimated chirp parameters to generate a rechirped signal (yr[u]); providing the rechirped signal (yr[u]) to a radar signal processing module (108); and the radar signal processing module (108) processing the rechirped signal (yr[u]) to retrieve target information from the rechirped signal (yr[u])..

Techniques are disclosed for implementing a CMOS-compatible millimeter wave matrix computing network architecture, which enables high-speed matrix operations for deep learning neural networks through a reconfigurable feedforward architecture using matrix computing meshes. Each mesh may include hybrid couplers and adjustable phase shifters. The architecture may be configured in various arrangements with programmable weights. The architecture offers advantages over existing solutions through full CMOS compatibility, the elimination of optical-electrical conversion, improved scalability, total latency, and superior power efficiency. Applications include massive MIMO systems and cognitive radar, in which the network may be implemented as part of RF front ends to reduce ADC requirements, system complexity, and power consumption.

A system for filter enhancement, preferably including one or more analog taps and a controller, and optionally including one or more couplers. The system is preferably configured to integrate with a filter, such as a passband filter or other frequency-based filter. The system can be configured to integrate with an RF communication system, an RF front end, or any other suitable RF circuitry. A method for filter enhancement, preferably including configuring one or more analog taps, and optionally including calibrating a system for filter enhancement and / or receiving temperature information.

The embodiments of the present disclosure provide a variable gain amplifier and a radio frequency front end, wherein the variable gain amplifier comprises: a variable gain module and a compensation module; the variable gain module comprises a main transistor pair and a cross-coupled transistor pair; the compensation module comprises a turned-off first transistor and a turned-off second transistor; wherein, when the phase of the attenuation state of the variable gain module lags behind the phase of the reference state, the input end and the output end of the first transistor are respectively connected to the input end and the output end of one of the main transistor pair, and the input end and the output end of the second transistor are respectively connected to the input end and the output end of the other of the main transistor pair; or, when the phase of the attenuation state of the variable gain module leads the phase of the reference state, the input end and the output end of the first transistor are respectively connected to the input end and the output end of one of the cross-coupled transistor pair, and the input end and the output end of the second transistor are respectively connected to the input end and the output end of the other of the cross-coupled transistor pair.

Systems, methods, processors, and circuitries are provided for an ambient IoT system. In one example, a carrier wave node device of an ambient IoT system includes radio frequency (RF) front end circuitry and a processor. The processor is configured to, when executing instructions stored in a memory, determine one or more carrier wave frequencies associated with a configured device-to-reader (D2R) channel of an ambient IoT system bandwidth; and control the RF front end circuitry to transmit a carrier wave having frequency components corresponding to the one or more carrier wave frequencies.

A wireless system comprises a modem and an RF front end coupled to an analog beamforming network. A processor executes a daemon which acquires predefined parameters from the modem in response to different beams generated by the beamforming network. A local machine learning (ML) processor is configured to receive first data from the daemon including the predefined parameters and to generate second data using the first data for optimally setting each of the different beams. The local ML processor is configured to select the best beam based on performance metrics of the wireless system. The local ML processor is configured to communicate the second data to a remote ML processor and to receive third data from the remote ML processor. The local ML processor is configured to generate the second data using the first data and the third data for optimally setting each of the different beams.

The invention discloses a radio frequency front end of a radar receiver with a large dynamic range, relates to the field of wireless communication, and aims to solve the problem that a third-order intercept point and a noise coefficient are difficult to meet indexes under the condition that an existing receiver meets high sensitivity. The method comprises the following steps: a receiving calibration switch selects to input an antenna signal and a calibration signal into a preposed step attenuator, the antenna signal and the calibration signal enter a numerical control tuned filter after impedance matching by a matching circuit, an output tuned and filtered signal enters a low-noise amplifier, and the signal after low-noise amplification and a receiving gate enter a frequency mixer after being selected by a transceiving switch; and the weak intermediate-frequency signal is subjected to signal intensity adjustment through the first amplifier and the rear step attenuator in sequence, and is processed by the crystal filter and the amplifier twice to output the intermediate-frequency signal. Under the condition of high sensitivity, the optimal signal-to-noise ratio can be obtained, the noise coefficient is reduced, the influence on a channel third-order intercept point index is reduced, and the harmonic suppression degree of an intermediate-frequency signal is improved.

A global positioning system (GPS) receiver may include an antenna configured to receive GPS signals from GPS satellites, a radio frequency (RF) front end configured to pre-process signals received by the antenna, a demodulator / converter configured to perform demodulation and analog-to-digital conversion of output signals received from the RF front end, a clock configured to provide a consistent clock signal, and a digital signal processor configured to receive the clock signal and make time and code measurements associated with determining a location of the GPS receiver based on the signals received by the antenna. The GPS receiver may be configured to eliminate reflected or indirect signals from the time and code measurements.

A signal processing device, used to suppress cross-talk nonlinear distortion of a RF front end circuit. The first circuit generates a first PD signal and a second PD signal according to a first input signal and a second input signal. The first PD signal and the second PD signal are provided to a first PA and a second PA of the RF front end circuit. The second circuit generates a first control signal and a second control signal according to a first output signal, a second output signal, a first DPD signal and a second DPD signal, so as to control the first circuit to generate the first PD signal and the second PD signal. The first PA generates the first output signal through a first filter having a first operating BW. The second PA generates the second output signal through a second filter having a second operating BW.

A radio frequency, RF, front end (12) for a vector network analyzer, VNA, measurement system (10) is described. The RF front end (12) includes a first front end portion (20) and a second front end portion (22). The first front end portion (20) comprises a first orientation unit (28) configured to couple an RF signal traveling toward the at least one port (16) out of the at least one measurement path (18). The first front end portion (20) further comprises a second directional unit (34) configured to couple RF signals traveling away from the at least one port (16) out of the at least one measurement path (18). The second front end portion (22) includes a frequency combining unit (42) and a switching stage (40).

The invention relates to the technical field of communication, and discloses a low-error vector amplitude radio frequency front end, which comprises an antenna switch, and an FDD signal filter, a TDD signal filter, a phase compensation load, a first antenna and a second antenna which are respectively connected with the antenna switch, a receiving channel and a transmitting channel of the TDD signal are dynamically switched; when the TDD signal receiving channel is switched to, disconnecting the phase compensation load from the FDD signal channel; when the TDD signal transmission channel is switched to, the phase compensation load is connected to the FDD signal channel, and the impedance characteristic of the TDD signal filter in the frequency band of the FDD signal is simulated, so that the load driven by the FDD signal channel is consistent with the load phase when the TDD signal is in a receiving state, and the error vector amplitude of transmitting the FDD signal is reduced. According to the invention, a low error vector amplitude can be maintained in an ENDC scene, and the communication quality in the scene is improved.

An example electronic device may include a first printed circuit board including a specified area. The first printed circuit board may include at least one first pad and at least one second pad formed in the specified area, wherein, when a first radio frequency (RF) front end module is disposed in the specified area of the first printed circuit board, at least one first pad is in contact with the first RF front end module and at least one second pad is not in contact with the first RF front end module, and, when a second RF front end module is disposed in the specified area of the first printed circuit area, at least one first pad and at least one second pad are in contact with the second RF front end module.

An RF multiplexing switching circuit for an RF front end (e.g., for a mobile communications device transmitting / receiving in the RF region) includes a set of RF inputs and a set of RF outputs outputting to RF filters, the RF inputs and outputs connected by signal paths. The switching circuit includes series switches for creating conducting signal paths for transmitting / receiving RF signals between the RF inputs and outputs, and a set of common shared shunt switches (e.g., for M RF inputs and N RF outputs, M+X shunt switches, where X<N) collectively capable (e.g., in conjunction with the series switches) of pulling to ground potential any RF input and output not on the conducting signal path. The RF switching circuit may be implemented as a band select switch (e.g., where the inputs connect to power amplifiers) or an antenna switch (e.g., where the inputs connect to device antennas).

A wireless device comprising a first antenna and second antenna, a transceiver and a radio frequency front end system electrically coupled between the transceiver and the antennas. The RF front end system includes a first module operable to provide a high band transmit signal to the first antenna, receive a first high band receive signal and a first mid band receive signal from the first antenna. The first high band receive signal has a frequency range greater than that of the first mid band receive signal. The RF front end system further includes a second module operable to provide a mid band transmit signal to the second antenna, receive a second mid band receive signal and a second high band receive signal from the second antenna. The second high band receive signal has a frequency range greater than that of the second mid band receive signal.

Systems, methods, devices, and machine-readable media for improved communication between a software defined radio front end device and a network based computing device are disclosed in some examples. Rather than grouping samples together, the same bit position from multiple ADC samples can be grouped together. If a quality of service (QoS) metric of a network connection between the RF front end device and the network based processing compute falls below a threshold, the RF front end device can preferentially transmit groups with higher significant bits over groups with lower significant bits. In other examples, the RF front end device can prefer samples corresponding to certain data types over other data types.

Multi-band electronic beam tilt for distributed amplifier antenna array. A first set of phase adjustment circuits within a low-power first-band RF transmit distribution network applies a first-band electronic beam tilt to a first-band RF transmit signal. A second set of phase adjustment circuits within a low-power second-band RF transmit distribution network applies a second-band electronic beam tilt to a second-band RF transmit signal. A first set of phase-adjusted first-band RF transmit signals is received at a set of RF front end modules that are distributed along an antenna array column. A second set of phase-adjusted second-band RF transmit signals is received at the set of RF front end modules. A set of subarrays of at least one radiating element is distributed along the antenna array column. Each subarray is connected to and positioned substantially adjacent to a corresponding RF front end module of the set of RF front end modules.

This invention discloses an on-chip spectrum sensing automatic gain control method and system for FPGA. The method includes: performing spectrum analysis on the received baseband signal, dynamically adjusting the detection threshold using a unit average constant false alarm rate algorithm, and calculating the minimum signal-to-noise ratio (SNR) required for signal detection based on the detection threshold; performing amplitude detection, logarithmic conversion, and filtering on the baseband signal based on the minimum SNR, and generating an attenuation control signal output to a digital attenuator at the RF front end to adjust the signal gain; wherein, the minimum SNR is dynamically updated based on the gain-adjusted baseband signal, and the attenuation is adjusted in real time based on the updated minimum SNR to stabilize the power of the input signal within the optimal dynamic range required for signal detection, forming a closed-loop feedback control.

The application discloses a transverse feedback excitation device with high shunt impedance and horizontal light extraction, and belongs to the technical field of particle accelerators. The device comprises a beam position probe (BPM), an RF front end, an ADC module, a digital signal processing module, a DAC module, a power divider, a power amplifier, a low-pass filter, an exciter (Kicker) and a matching load. The exciter Kicker has four electrode strips located on both sides of the beam center line and parallel to each other, two electrode strips on the same side are connected in parallel, the characteristic impedance of a single electrode strip is 100Ω, and the equivalent total characteristic impedance after parallel connection is 50Ω; the four electrode strips are distributed in a quadrangular symmetry in the cross section of the vacuum chamber and avoid the horizontal median plane, so as to form an open light path channel. The application improves the shunt impedance of the exciter, reduces the radio frequency power demand, realizes impedance matching with a standard 50Ω system, and guarantees the horizontal unobstructed extraction of the synchrotron radiation light.

A clamping circuit that may be used to provide efficient and effective voltage clamping in an RF front end. The clamping circuit comprises two series coupled signal path switches and a bypass switch coupled in parallel with the series coupled signal path switches. A diode is coupled from a point between the series coupled signal path switches to a reference potential. In addition, an output selection switch within an RF front end has integrated voltage clamping to more effectively clamp the output voltage from the RF front end. Additional output clamping circuits can be used at various places along a direct gain signal path, along an attenuated gain path and along a bypass path.

An example method includes: receiving an uplink channel by an RF front end module; partitioning the uplink channel into a plurality of sub-channels by a neural network channel divider, wherein the plurality of sub-channels correspond to a plurality of non-overlapping distance ranges; generating, a plurality of coarse distance estimates by a neural network distance estimator, wherein the plurality of coarse distance estimates comprise a distance estimate for each of the plurality of sub-channels; generating a plurality of fine-tuned distance estimates by optimizing the plurality of coarse distance estimates; and determining, from the plurality of fine-tuned distance estimates, a downlink channel prediction, wherein the downlink channel prediction predicts a downlink channel based on the uplink channel.