23 results about "Receiver front end" patented technology

The embodiment of the invention provides a satellite positioning receiver, a satellite positioning method and a storage medium, and relates to the technical field of satellite positioning navigation. The satellite positioning navigation receiver comprises an inertial sensing unit; a first processor and a second processor, the first processor is connected with the inertial sensing unit and the second processor, and the first processor is used for resolving the anti-interference satellite signal provided by the second processor and the receiver motion data provided by the inertial sensing unit to obtain a receiver pose; the receiver front end is used for receiving and processing the original satellite signal to obtain a preprocessed satellite signal; and the second processor is connected with the receiver front end and is used for carrying out anti-interference processing on the preprocessed satellite signal to obtain an anti-interference satellite signal. According to the receiver, resource competition of anti-interference processing, capture tracking and positioning calculation can be avoided, and due to the fact that the first processor and the second processor are arranged in a labor division mode, the receiver can process multiple satellite signals at the same time, and meanwhile positioning and navigation real-time performance is guaranteed.

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.

Technologies for providing temperature compensation in an analog receiver front end (RX AFE) are described. A receiving device includes an RX AFE circuit with at least one load component and at least one load inductor structure with a closed ring. The RX AFE circuit is subject to fluctuations in circuit parameters over a temperature range, causing temperature drift in the receiving device. The closed ring reduces the temperature drift by generating an eddy current to reduce the effective inductance of the at least one load inductor structure. The eddy current depends on the equivalent series resistance (ESR) of the closed ring.

The application discloses a low-power-consumption mixing-priority type wideband receiver front-end module, which is based on a mixing-priority architecture, does not need to use an external matching network, realizes impedance matching from an antenna to a receiver front end, realizes high-Q band-pass filtering characteristics, and comprises a third harmonic mixer, a 12-stage ring voltage-controlled oscillator and a TIA transimpedance operational amplifier.The third harmonic mixer is connected with the 12-stage ring voltage-controlled oscillator and the TIA transimpedance operational amplifier.The 12-stage ring voltage-controlled oscillator provides a required local oscillator signal for the third harmonic mixer.The third harmonic mixer is used for down-converting an RF radio frequency signal into a zero intermediate frequency signal by using a third harmonic component of the local oscillator.The TIA transimpedance operational amplifier is used for effectively amplifying and filtering a zero intermediate frequency signal down-converted by the third harmonic mixer and then outputting the zero intermediate frequency signal.The application has lower power consumption than a conventional wideband receiver.

Disclosed herein is mesh relay module for relaying signals between nodes in a wireless mesh network. In one implementation, this mesh relay node may include a receiver front end comprising a receiver-side phased antenna array for receiving signals in one respective beam direction, a transmitter front end comprising a transmitter-side phased antenna array for transmitting signals in another respective beam direction, a communication interface, and circuitry that is configured to control the respective beam directions of the receiver and transmitter front ends and transfer signals between the receiver and transmitter front ends. Further, this mesh relay node may function to provide an indirect communication path between nodes within the wireless mesh network by (i) receiving signals from a first direction associated with a first node via the receiver front end and (ii) transmitting received signals in a second direction associated with a second node via the transmitter front end.

A near-fuse ranging method based on fast warping Fourier transform, comprising the following steps: a single-chip radar in a near-fuse emits a triangular wave detection signal to a detection area, the signal is received by a receiving antenna of the single-chip radar after being reflected by the detection area, a radar echo digital signal is obtained by a pre-processing of a receiver front end of the single-chip radar, and the echo digital signal is sent to a signal processor; the echo digital signal is fitted by a WFFT fitting non-uniform filter group of the signal processor, and a modulus value of a processing result is taken to obtain a spectrum diagram of target energy accumulation with high resolution in a low frequency area and diffusion in a high frequency area; a detection threshold is set, a constant false alarm rate detection is performed on the spectrum diagram of target energy accumulation with high resolution in the low frequency area and diffusion in the high frequency area, and target frequency information is extracted; and distance information is calculated and transmitted to a fuse control system through a missile-borne computer. The present application improves the signal-to-noise ratio in the high frequency area and more accurately captures high frequency information.

A receiver front end amplifier capable of receiving and processing intraband non-contiguous carrier aggregate (CA) signals using multiple low noise amplifiers (LNAs) is disclosed herein. A cascode having a “common source” configured input FET and a “common gate” configured output FET can be turned on or off using the gate of the output FET. A first switch is provided that allows a connection to be either established or broken between the source terminal of the input FET of each LNA. Further switches used for switching degeneration inductors, gate capacitors, and gate to ground capacitors for each leg can be used to further improve the matching performance of the invention.

The invention relates to the technical field of avionics, in particular to a real-time digital monitoring data processing method and device for a dual-frequency modulation signal. Processing a monitoring composite signal of the instrument landing system received by the front end of the receiver to obtain an attenuation processing analog signal; according to an ADC analog-to-digital conversion circuit, performing digital signal conversion on the attenuation processing analog signal to obtain a digital domain sampling signal; performing two-stage DDC orthogonal digital down-conversion processing on the digital domain sampling signal to obtain a baseband signal, a 90Hz component and a 150Hz component; extracting and sampling the baseband signal, the 90Hz component and the 150Hz component to obtain a direct current component sequence, a 90Hz component sequence and a 150Hz component sequence after synchronous downsampling; according to the direct current component sequence, the 90Hz component sequence and the 150Hz component sequence, a modulation degree difference DDM and a modulation degree sum SDM are obtained, and updating of real-time digital monitoring data of the dual-frequency modulation signals is achieved. And the accuracy of signal acquisition and the reliability of subsequent processing are improved.

Methods and devices to minimize or reduce phase discontinuity between different gain modes (including bypass, active and passive modes) with reduced increase in circuit size (footprint or number of components) and complexity, without impacting other performance parameters, are disclosed. Phase shifter elements that can be disposed in both the active and passive bypass paths are also described. Moreover, devices using the same reconfigurable phase shifter elements in both active and bypass modes are described. Components of the phase shifters can also perform output matching when the phase shifters are implemented as part of an RF receiver front-end.

The present disclosure provides a receiver front-end circuit, comprising: a first input unit and a second input unit, configured to operate alternately on the basis of a common-mode voltage of a differential input signal and to output a differential output signal; a variable resistor unit, configured to adjust, on the basis of a variable resistor control signal, a differential load resistance provided to the differential output signal; and a control unit, configured to generate the variable resistor control signal on the basis of the common-mode voltage of the differential input signal. According to the receiver front-end circuit of the present disclosure, a differential input signal having a wide common-mode voltage range can be received at a low power supply voltage, and the output amplitude of the generated differential output signal does not vary significantly with changes in the common-mode voltage of the differential input signal, thereby improving receiver compatibility and reducing power consumption.

A unique low power dual mode amplifier system for a receiver front end or transmitter is described. The invention is configured to utilize a common gain block element for amplification of both the RF-IF signal components found within a super heterodyne receiver. Replacement of separate gain stages for RF and IF components by a single common gain block offers a substantial power consumption reduction for a receiver or transmitter design. Implementation of the invention is possible using commonly found well known RF or IF circuitry elements. The invention combines several of the basic functions necessary to build a receiver or transmitter including frequency band selection, signal amplification and frequency conversion into a simple topology. An integrated circuit and discrete component type example implementations are provided.

The application relates to a novel dual-mode switching switch, which comprises two single-pole double-throw switches and is left-right mirror symmetrical, and can switch three-port mode and four-port mode, the three-port mode is one-input two-output (or two-input one-output), and the four-port mode is two-input two-output. The switch can be applied to a millimeter wave transmitter and receiver front end as a signal switching and mode switching module. Compared with a traditional switch, the switch has the advantages of balanced output signals in two different working modes, small insertion loss, high isolation, small area, high integration and the like.

One example includes a passive radar receiver system including an RF receiver front-end to receive a wireless source signal and a reflected signal. An antenna switch of the front-end switches a first antenna to a receiver chain during a first time to generate first radar signal data based on a combined wireless signal comprising wireless source signal and the reflected signal, and switches a second antenna to the receiver chain during a second time to generate second radar signal data based on the combined wireless signal. A signal processor generates source signal data associated with the wireless source signal based on the first and second radar signal data and generates reflected signal data associated with the reflected signal based on the first and second radar signal data, and generates target radar data associated with a target based on the source and reflected radar signal data.

The application discloses a low-noise amplifier structure adopting multi-inductive coupling and current multiplexing, comprising a multi-inductive coupling network and a full nmos current multiplexing technology network, wherein the multi-inductive coupling network and the full nmos current multiplexing technology network are connected, the full nmos current multiplexing technology network is used for making multi-stage amplifiers flow through the same current and making the multi-stage amplifiers share the same power voltage, and the multi-inductive coupling network is used for realizing wideband maximum power transmission matching and noise coefficient matching at an input node, so that high power transmission and low noise coefficient are realized. By using the application, wideband input matching and noise matching can be realized simultaneously. The application can be widely applied to the field of radio frequency receiver front ends.

The present disclosure provides a radio frequency (RF) receiver front-end comprising an RF integrated circuit chip with an antenna port terminal for coupling to an external antenna. The chip includes a low-noise amplifier coupled between an RF input terminal and an RF output terminal; an integrated built-in self-test system featuring resistors, a test switch, an oscillator generating a square-wave signal for testing, a buffer sharpening edges of the square-wave signal, and a controller performing self-tests to determine one or more characteristics of the RF receiver front-end. Additionally, an analog-to-digital converter converts test signals into digital form for analysis by the controller. An electronically controllable antenna switch is included to facilitate selective coupling between the antenna port and the RF input terminal during reception of RF signals or built-in self-testing. The system enables efficient testing and characterization of the RF receiver front-end directly on-chip, enhancing reliability in wireless communications devices.

In one aspect, a method comprises: monitoring, via at least one computer system of a central entity, performance information of a plurality of wireless devices present in a network environment remotely coupled to the central entity; updating a monitoring database based on monitoring the performance information; and causing at least some of the plurality of wireless devices to be reconfigured from a first mode to a second mode based at least in part on the performance information.

A packet energy transfer (PET) receiver comprising receiver front-end circuitry including an input, an output, and at least one switch connected at the output. There is receiver output control and conditioning circuity including an input and an output to be connected to an electrical load. There is a synchronizer circuit to close the switch to allow power to flow into the receiver output control and conditioning circuitry during each of the first plurality of transfer periods of the transmitter and to open the switch to prevent power to flow into the receiver output circuitry during a first plurality of sample periods. There is a load controller that disables the synchronizer circuit and operates the switch to close it and allow power to flow into the receiver output control and conditioning circuitry during subsequent transfer periods and to open the switch to prevent power to flow during a subsequent sample periods.

A radio frequency front-end (RF-FE) device with a reconfigurable common-mode feedback control. The device includes a plurality of RF-FE channels and a reconfiguration switch. An RF-FE channel includes a common-mode feedback loop. The common-mode feedback loop is configured to detect a common-mode signal in differential signals in the RF-FE channel and generate a feedback signal to set the common-mode signal. The reconfiguration switch is configured to couple common-mode feedback loops of two or more RF-FE channels based on an operation mode. The reconfiguration switch may be controlled to couple common-mode feedback loops of two or more RF-FE channels if the two or more RF-FE channels receive a same input signal and decouple common-mode feedback loops of two or more RF-FE channels if the two or more RF-FE channels receive different input signals.

The invention relates to an absolute precision on-chip RF source for built-in self-test. A radio frequency (RF) receiver front end is provided that includes an RF integrated circuit chip having an antenna port terminal for coupling to an external antenna. The chip includes: a low noise amplifier coupled between an RF input terminal and an RF output terminal; an integrated built-in self-test system featuring a resistor, a test switch, an oscillator that generates a square wave signal for test, a buffer that sharpens an edge of the square wave signal, and a controller that performs a self-test to determine one or more characteristics of the RF receiver front end. In addition, the analog-to-digital converter converts the test signal into a digital form for analysis by the controller. Comprising an electronically controllable antenna switch for selective coupling between an antenna port and an RF input terminal during reception of an RF signal or built-in self-test. The system enables efficient testing and characterization of the RF receiver front end directly on-chip, thereby enhancing the reliability of the wireless communication device.

A receiver front-end architecture for in-band carrier aggregation is disclosed. In an exemplary embodiment, an apparatus includes a first transistor having a gate terminal for receiving an input signal, a drain terminal for outputting an amplified signal, and a source terminal connected to signal ground via a source degradation inductor. The apparatus also includes a second transistor having a source terminal connected to the drain terminal of the first transistor and a drain terminal connected to a first load. The apparatus further includes a third transistor having a gate terminal connected to the drain terminal of the first transistor, a drain terminal connected to a second load, and a source terminal connected to signal ground.

This invention discloses a dish / Stirling solar power generation system with an adjustable secondary concentrator, including a dish concentrator, a Stirling thermoelectric generator, a cavity receiver, a secondary concentrator, a spot measurement device, an image processor, and a controller. The secondary concentrator includes a rotating cylinder rotatable about an axis, a secondary concentrator mirror hinged to the rotating cylinder, and a push-pull device for driving the secondary concentrator mirror's rotation. This invention installs a low-power adjustable secondary concentrator mirror at the front end of the cavity receiver of the Stirling thermoelectric generator. A rotatable planar receiving target and a CCD camera measure the actual focused spot, and the energy centroid coordinates are processed and fed back to the controller to adjust the secondary concentrator mirror's orientation. This improves the circumferential energy uniformity of the absorber coil and reduces the peak energy flux density, achieving safe and efficient light-heat-electric energy conversion in the dish / Stirling system. This invention also discloses a method for adjusting the orientation of the secondary concentrator mirror.

A radio frequency (RF) transceiver includes a reference signal source to generate a reference signal, a local RF source to generate a local RF signal, and a mixed signal phase / frequency detector to compare the reference signal to the local RF signal and generate a difference signal from the comparison, wherein the difference signal includes a modulation component and an error component. The transceiver further includes a receiver front end to receive an angle modulated RF signal and downconvert the angle modulated RF signal to a baseband signal, and a quadrature modulator configured to angle modulate the reference signal source with the baseband signal.

A dual-wedge dynamic rotation dimming solar concentrator system includes a concentrator for focusing sunlight, a cavity receiver for absorbing light energy, two wedge devices, B and A, coaxially connected at the light-transmitting end of the cavity receiver, a drive device for reciprocating sliding of the wedge device A along the axial direction of the cavity receiver, a temperature acquisition instrument for collecting temperature signals inside the cavity receiver, a cooling system for cooling the wedge devices B and A, and a controller for controlling the operation of each device. This invention utilizes two wedge devices with adjustable spacing and relative rotation at the front end of the cavity receiver to allow for arbitrary circumferential adjustment of the concentrator's focus on sunlight around the receiver axis, effectively solving the problem of localized high peak energy flow caused by tracking errors or load deformation. Through the relative dynamic rotation of the two wedge devices and the reciprocating motion of the wedge device A, dynamic uniformity of energy flow distribution in the heat-absorbing coil within the cavity receiver can be achieved, ensuring safe and efficient operation.