Embodiments of the invention include a wakeup receiver (WRX) featuring a charge-domain analog front end (AFE) with parallel radio frequency (RF) rectifier, charge-transfer summation amplifier (CTSA), and successive approximation analog-to-digital converter (SAR ADC) stages. The WRX operates at very low power and exhibits above-average sensitivity, random pulsed interferer rejections, and yield over process.

A millimeter wave base station antenna system having a multi-port antenna array and a baseband signal processor, the baseband signal processor having an uplink baseband processing unit for generating a first weighting function, and a downlink baseband processing unit for generating a second weighting function; the first weighting function and the second weighting function being used to enhance the desired signal and eliminate the multiuser interference.

A system includes a Zero IF transmitter having a mixer and a programmable gain stage. The Zero IF transmitter also includes an intermediate stage between the mixer and the programmable gain stage, wherein the intermediate stage is configured to decouple the mixer and the programmable gain stage.

A radio frequency (RF) control circuit is provided. The RF control circuit includes power amplifier (PA) circuitry for amplifying an RF signal and control circuitry configured to improve linearity of the PA circuitry based on a PA signature(s) already available and utilized to perform digital pre-distortion (DPD) in the RF control circuit. In examples discussed herein, the control circuitry determines a performance deviation of the PA circuitry based on the PA signature and continuously adjusts a bias voltage(s) supplied to the PA circuitry until the performance deviation is reduced to a predetermined performance deviation threshold. By continuously monitoring the performance deviation based on the PA signature(s) and adjusting the bias voltage(s), the control circuitry can detect and correct an operation abnormality of the PA circuitry in a timely manner. As a result, it is possible to maintain linearity in the PA circuitry for enhanced PA performance.

An apparatus of user equipment (UE) includes a radio integrated circuit (IC), an adjustable external low noise amplifier (eLNA) external to the radio IC, and processing circuitry. The radio IC includes a receive signal circuit path including an adjustable gain internal low noise amplifier (iLNA), and a transmit signal circuit path including a digital-to-analog converter (DAC) circuit configured to convert digital signals to analog baseband signals for transmitting. The processing circuitry is configured to provide digital values of the digital signals to the DAC circuit and initiate adjusting gain of one or both of the iLNA and the eLNA according to the digital values.

This application discloses a radio frequency receiver and a wireless communication apparatus. The radio frequency receiving apparatus includes: a first receiver, including a first receive channel and a second receive channel; a second receiver, including a third receive channel, where both maximum signal bandwidths supported by the first receive channel and the second receive channel are less than a maximum signal bandwidth supported by the third receive channel; an analog-to-digital converter ADC group, including a plurality of ADCs, where the plurality of ADCs includes a first ADC and a second ADC; and a channel router, configured to allocate an ADC.

A wireless communication device includes a processor, a baseband signal processing circuit and a wireless transceiver circuit. The processor determines a transmission need, determines a transmission rate according to the transmission need and a channel condition, and provides data and information regarding the transmission rate to the baseband signal processing circuit. The information regarding the transmission rate includes at least one of a selected transmission standard, a selected physical layer data transmission rate and a selected modulation and coding scheme. The baseband signal processing circuit is coupled to the processor and processes the data according to the information regarding the transmission rate to accordingly generate a packet. The wireless transceiver circuit is coupled to the baseband signal processing circuit and transmits the packet.

An apparatus including a signal generation circuitry to provide a stream of digital signals carrying data. The apparatus includes a storage circuitry to provide a plurality of transmit levels corresponding to respective predetermined equalization levels; selection circuitry to select a transmit level from among the plurality of transmit levels based on the digital signals carrying data. Each of the plurality of transmit levels is a respective input signal to the selection circuitry. The apparatus includes a digital-to-analog converter (DAC) circuitry configured to receive the selected transmit level and convert the selected transmit level to an analog signal of the selected transmit level.

An object of the present disclosure is to prevent an output level of an analog signal from exceeding a predetermined upper limit value, in a module that adjusts a level of the analog signal. According to the present disclosure, there is provided a signal generation apparatus including an RF base module (12) that converts a digital base band signal for testing into an intermediate frequency (IF) signal and outputs the IF signal, and a control unit (18), in which the RF base module is connected to an RF converter (20) which outputs an analog RF signal obtained by frequency-converting the IF signal, and the control unit clips the IF signal output from the RF base module based on an output level of the analog RF signal output from the RF converter.

A system and method for enhancing an aerospace coverage capability of a mobile communication base station includes a baseband processing unit, a remote radio unit and a full-airspace array antenna. The full-airspace array antenna includes a conversion channel module, an interface processing module, a digital beamforming module, a transceiver channel module and an antenna array. The baseband processing unit is connected to the remote radio unit, the remote radio unit is connected to the conversion channel module through a radio-frequency cable, and the conversion channel module is connected to the antenna array successively through the interface processing module, the digital beamforming module, and the transceiver channel module.