A first mixer and a second mixer subject a received signal to quadrature detection by using a local signal. The first mixer and the second mixer subject the received signal subjected to the quadrature detection to frequency conversion so that, of harmonics of a frequency generated by a reference oscillator oscillation, a harmonic having a frequency closest to a frequency of the received signal subjected to the quadrature detection has a predetermined frequency. A first HPF and a second HPF attenuate the predetermined frequency in the received signal subjected to frequency conversion. The first mixer and the second mixer perform frequency conversion so that the frequency of the received signal is 0 Hz. An adjacent channel attenuation filter attenuates an adjacent channel component in the received signal subjected to frequency conversion.

A first mixer and a second mixer subject a received signal to quadrature detection by using a local signal. The first mixer and the second mixer subject the received signal subjected to the quadrature detection to frequency conversion so that, of harmonics of a frequency generated by a reference oscillator oscillation, a harmonic having a frequency closest to a frequency of the received signal subjected to the quadrature detection has a predetermined frequency. A first HPF and a second HPF attenuate the predetermined frequency in the received signal subjected to frequency conversion. The first mixer and the second mixer perform frequency conversion so that the frequency of the received signal is 0 Hz. An adjacent channel attenuation filter attenuates an adjacent channel component in the received signal subjected to frequency conversion.

A receiver for cancelling strong signals from combined weak and strong signals includes: a first circuitry for inputting a weak and strong signal as an input; a parametric cancellation circuit for inputting a representation of the strong signal and an output of the first circuitry to produce a cancellation signal; a second circuitry electrically coupled to the parametric cancellation circuit for inputting the cancellation signal to produce a modulated output; a demodulator electronically coupled to the second circuitry for demodulating the modulated output to produce a demodulated output and an error signal, where the demodulated output is the data contained in the weak signal; and an adaptation logic circuit for inputting the representation of the strong signal, the demodulated output and the error signal to adaptively produce parameters for the parametric cancellation circuit. The parametric cancellation circuit further inputs the error signal and the parameters to produce the cancellation signal.

A receiver for cancelling strong signals from combined weak and strong signals includes: a first circuitry for inputting a weak and strong signal as an input; a parametric cancellation circuit for inputting a representation of the strong signal and an output of the first circuitry to produce a cancellation signal; a second circuitry electrically coupled to the parametric cancellation circuit for inputting the cancellation signal to produce a modulated output; a demodulator electronically coupled to the second circuitry for demodulating the modulated output to produce a demodulated output and an error signal, where the demodulated output is the data contained in the weak signal; and an adaptation logic circuit for inputting the representation of the strong signal, the demodulated output and the error signal to adaptively produce parameters for the parametric cancellation circuit. The parametric cancellation circuit further inputs the error signal and the parameters to produce the cancellation signal.

A millimeter-wave phase array system may include massive heterodyne transceivers as its building elements. A transceiver of each element may include an IQ image rejection heterodyne transmitter and a receiver. Each transmitter may include a single DAC, a Tx I channel, and a Tx Q channel. Each receiver may include an Rx I channel, an Rx Q channel, and a single ADC. For Tx IQ image rejection calibration, amplitude and phase offsets are determined, using both the Tx I and Tx Q channels from a first element and using only one of the Rx I or Rx Q channel from a second element. The IQ channel imbalances are compensated using the offsets in analog domain. A similar procedure is used for Rx IQ image rejection calibration with alternated signal path enabling. A frequency response variation of an RF front end is detected with a single path Tx/Rx channel setup.

A transceiver circuit includes transmit circuitry comprising a transmit baseband filter and a driver amplifier having an output coupled to a power amplifier, receive circuitry comprising a low noise amplifier and a receive baseband filter, mixer circuitry and a magnetic circuit, wherein the mixer circuitry and the magnetic circuit are coupled between the transmit baseband filter and the driver amplifier, and are further coupled between the low noise amplifier and the receive baseband filter, wherein the mixer circuitry and the magnetic circuit are shared between the transmit circuitry and the receive circuitry in a time division duplexing (TDD) communication system.

A transceiver circuit includes transmit circuitry comprising a transmit baseband filter and a driver amplifier having an output coupled to a power amplifier, receive circuitry comprising a low noise amplifier and a receive baseband filter, mixer circuitry and a magnetic circuit, wherein the mixer circuitry and the magnetic circuit are coupled between the transmit baseband filter and the driver amplifier, and are further coupled between the low noise amplifier and the receive baseband filter, wherein the mixer circuitry and the magnetic circuit are shared between the transmit circuitry and the receive circuitry in a time division duplexing (TDD) communication system.

A method for detecting an RF signal detected by a super-regenerative receiver (1). The receiver includes a reference oscillator (4) for generating an oscillation in the oscillator, a bias current generator (7) for supplying a bias current, an oscillation detector (6) connected between an output (coilp) of the oscillator and the bias current generator for controlling when an RF signal is received by the receiver, and an impedance matching unit (3) disposed between the input of the receiver and the reference oscillator (4). Following activation of a start control signal, detection of the oscillation of the reference oscillator is performed, and once the reference oscillator oscillates above a critical increasing bias current value, the oscillation detector orders the bias current generator to cut off the bias current and thus stop the oscillation of the reference oscillator to reduce the overall electricity consumption during an RF signal detection phase.

A method for detecting an RF signal detected by a super-regenerative receiver (1). The receiver includes a reference oscillator (4) for generating an oscillation in the oscillator, a bias current generator (7) for supplying a bias current, an oscillation detector (6) connected between an output (coilp) of the oscillator and the bias current generator for controlling when an RF signal is received by the receiver, and an impedance matching unit (3) disposed between the input of the receiver and the reference oscillator (4). Following activation of a start control signal, detection of the oscillation of the reference oscillator is performed, and once the reference oscillator oscillates above a critical increasing bias current value, the oscillation detector orders the bias current generator to cut off the bias current and thus stop the oscillation of the reference oscillator to reduce the overall electricity consumption during an RF signal detection phase.

A correction method (500) for a super-regenerative receiver (100) being configured to resonate at at least one oscillator resonant frequency reference value (111) and comprising at least one control stage (130), at least one varactor (140), at least one reference system (150) and, at least one oscillator (110). The method includes at least one setup (510) of at least one reference signal value (158) by the at least one reference system (150), at least one comparison (560) of at least one oscillator frequency actual value (112) of the at least one oscillator (110) with the at least one reference signal value (158) by the at least one reference system (150) and at least one adjustment (570) of at least one gain of the at least one control stage (130).