40 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.

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.

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.

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.

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 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.

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.

This application provides an adaptive adjustment method for impedance matching network of a portable radio range extender, comprising: extracting the battery terminal voltage signal and transmit duty cycle from the radio's RF front end; analyzing the battery terminal voltage signal to identify the battery terminal voltage drop pattern and determining the tilt attitude of the drain dynamic load line under the depth of discharge; using an adaptive convergence algorithm to link the rising and falling direction of the tuning capacitor position with the reflection recovery pattern, and when the rising and falling direction is positive, increasing the tuning capacitor position; otherwise, decreasing the position to form a matching network setting; updating the rearranged links of the frequency positions in the memory tuning table according to the matching network setting to generate an adaptive adjustment link; and combining the adaptive adjustment link with the current battery terminal voltage drop pattern and the tilt attitude of the drain dynamic load line to optimize the reflection recovery pattern and determine the impedance mismatch tuning scheme.

The present application relates to the technical field of particle accelerator, and especially relates to a transverse feedback system with switchable excitation direction and a control method thereof, which comprises: a beam position probe (BPM) for measuring a beam signal; an RF front end for receiving the beam signal sent by the beam position probe (BPM) and performing amplification and filtering processing; an ADC module for converting the beam signal into a digital signal; a digital signal processing module for performing digital signal processing calculation to obtain an excitation signal; a DAC module for performing digital-to-analog conversion; a power divider for adjusting the phase of the excitation signal; and a kicker including four charged electrodes, a power amplifier, a low-pass filter and a matching load for applying a transverse excitation signal to the beam. The present application solves the problems of the prior art, such as large occupation of longitudinal space by the transverse feedback system (Kicker), complex system, low precision and low efficiency.

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.

In one aspect, an apparatus comprises: a radio frequency (RF) front end circuit to receive and process an RF signal comprising a packet, the RF front end circuit to output a digital signal comprising the packet; and a baseband circuit coupled to the RF front end circuit. The baseband circuit may comprise: a demodulator to receive the digital signal comprising a plurality of extended and modulated symbols and to: perform a plurality of operations on at least some of a first block of the plurality of extended and modulated symbols according to a reverse recipe of operations to obtain a processed first block of the plurality of extended and modulated symbols; aggregate the processed first block of the plurality of extended and modulated symbols into an aggregated symbol; and demodulate the aggregated symbol to obtain at least one soft value.

A wireless communication device may include a processor, a first RF integrated circuit including a first control port for controlling a first RF processing circuit and a RF front end circuit and configured to communicate with the processor, a second RF integrated circuit including a second control port for controlling a second RF processing circuit and the RF front end circuit and configured to communicate with the processor, and the RF front end circuit controlled through the first control port and the second control port and configured to communicate with the first RF integrated circuit to exchange a first RF signal, wherein the processor is configured to determine whether to process a second RF signal in the second RF processing circuit and deactivate at least one component for processing the second RF signal in the second RF processing circuit based on the determining.

A radio frequency (RF) front end receives one or more symbols of a first frame transmitted by a transmitter. The RF front end determines that the one or more received symbols are related to one or more address symbols, where each of the one or more address symbols is a time domain signal of a subcarrier transmitted by the transmitter. The RF front end provides the one or more received symbols to a baseband system based on the relation. The baseband system recovers bits of a second frame within the first frame based on the one or more received symbols.

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 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 invention provides a stray radiation optimization method and device of a radio frequency front end, a medium and a product, and relates to a wireless communication technology. The method comprises the following steps: acquiring a working frequency band of a modem connected with a radio frequency front end; according to the working frequency band, determining an isolation port when the radio frequency front end does not generate stray radiation; and controlling to set the isolation port to be in an isolation state. According to the method and the device, the isolation port when the radio frequency front end does not generate stray radiation is determined according to the acquired working frequency band of the modem connected with the radio frequency front end, and the isolation port is controlled to be set in the isolation state, so that when the wireless communication equipment enters the working frequency band, the isolation port is actively set in the isolation state; therefore, the generation of stray radiation at the radio frequency front end is effectively prevented or suppressed, and the hysteresis quality that passive processing can be carried out only after the stray radiation is generated in the existing method is overcome.

The present invention relates to a method (10) for operating a measuring device (20), in particular a signal and / or spectrum analyzer. The method (10) comprises the steps of: connecting (11) a DUT 30 [device-under-test] to an RF front end (21) of the measuring device (20); receiving and / or measuring (12) one or more signal degradation parameters of the DUT (30) and / or of user equipment attached to the DUT; and adapting (13) a configuration of the RF front end (21) based on at least one of the signal degradation parameters. FIGURE IN ABRIDGED: 1.