A multi-port transmitter can synthesize and send a first plurality of transmit signals having a separability characteristic which permits them to be differentiated from one another. A receiver can then detect one or more receiver signals which include one or more combinations of received versions of the first plurality of transmit signals. The receiver may use the separability characteristic to determine the received versions of the first plurality of transmit signals from the one or more receiver signals. Then, the receiver may determine an estimated signal corresponding to the estimated receiver response to a second plurality of virtual transmit signals which comprise a combination of the first plurality of transmit signals. Determining the estimated signal may include forming a combination of the received versions of the first plurality of transmit signals.

A transmitter circuit includes at least one transmitting signal processing device, a compensation device and a compensation value calibration device. The at least one transmitting signal processing device sequentially generates multiple output signals according to multiple input signals. The compensation device sequentially generates the input signals according to multiple initial compensation values. The compensation value calibration device receives the output signals as multiple feedback signals and performs a calibration operation according to the feedback signals. The compensation value calibration device includes a digital signal processor coupled to the compensation device. In the calibration operation, the digital signal processor determines a first characteristic curve according to the initial compensation values and power of the feedback signals at a predetermined frequency, determines a first compensation value corresponding the minimum power according to the first characteristic curve and provides the first compensation value to the compensation device.

Systems and methods are directed to phase modulation of polar coordinates in a transmitter of wireless signals, to achieve high transmit power levels while meeting spectral mask and EVM requirements. An input signal is mapped to a sequence of modulation frequency (e.g., O-QPSK to MSK) to generate a mapped signal. A digital frequency shaping filter is applied to the mapped signal to generate a shaped signal. An adaptive rounding algorithm is applied to the shaped signal to generate a reduced bit-width signal. A digital frequency synthesizer is applied to the reduced bit-width signal to generate an analog waveform for transmission.

Embodiments of the present disclosure provide a circuit and a method for digital fingerprint generation, and an electronic device. The digital fingerprint generation method includes inputting an input signal from outside; generating a frequency relationship indication signal between an input signal and a feedback signal; generating a frequency control signal based on the frequency relationship indication signal; generating an intermediate signal based on a frequency control signal and pulse signals; dividing the intermediate signal in frequency to generate the feedback signal; and generating a digital fingerprint based on the input signal and the feedback signal.

A modulated signal generating device for modulating includes a first amplifier that generates a first amplified signal based on a first control signal; a second amplifier that has a smaller amplification factor as compared to the first amplifier and that generates a second amplified signal based on a second control signal; a combiner that combines the first amplified signal and the second amplified signal and generates a modulated signal; a first control unit that generates the first control signal based on a first component signal included in a input signal; a first filter that eliminates the harmonic component included in a first difference signal, which represents the difference between the input signal and the first component signal, and generates a first filtered signal; and a second control unit that generates the second control signal based on a second component signal included in the first filtered signal.

The disclosure relates to a pre-5th-generation (5G) or 5G communication system to be provided for supporting higher data rates beyond 4th-generation (4G) communication system such as long term evolution (LTE). An operation method of a device for upconversion in a wireless communication system is provided. The method includes receiving a first local oscillator (LO) signal, generating a second LO signal, based on the first LO signal and cross-coupled latches, receiving an input signal, generating an upconverted frequency, based on the second LO signal and the input signal, generating an output signal obtained by processing a harmonic component included in the upconverted frequency, and transmitting the generated output signal.

A method and system for extracting values representative of modulation signal components from a modulated signal, the modulated signal containing a modulation signal, including developing a local clock signal which correlates in time to the modulated signal and includes a number of phase sectors per cycle and converting the modulated signal into a current that is representative of the signal and routing the current to the inverting input of an amplifier and charging one of a plurality of capacitive devices during each phase sector and sequentially connecting the capacitive devices between the output of the amplifier and the inverting input of the amplifier in non-overlapping sequences, the total of sequences being equal to one full cycle of the clock.

A microwave communication system may include subscriber stations in communication with a base station. The stations may include time duplex circuitry normally found in wireless local area networks (WLANs). Signals normally routed through antennas associated with such circuitry instead are routed through circuitry to perform frequency conversion to and from microwave communications frequencies, for communications over microwave links between the subscriber stations and the base station. In some embodiments the wireless circuitry is configured for multiple input multiple output (MIMO) operation with one antenna port dedicated for transmission of data and one antenna port dedicated to reception of data.

Methods and systems for vector combining power amplification are disclosed herein. In one embodiment, a plurality of signals are individually amplified, then summed to form a desired time-varying complex envelope signal. Phase and/or frequency characteristics of one or more of the signals are controlled to provide the desired phase, frequency, and/or amplitude characteristics of the desired time-varying complex envelope signal. In another embodiment, a time-varying complex envelope signal is decomposed into a plurality of constant envelope constituent signals. The constituent signals are amplified equally or substantially equally, and then summed to construct an amplified version of the original time-varying envelope signal. Embodiments also perform frequency up-conversion.

This application relates to a sideband suppression method performed at a computer device. The method includes: obtaining a target baseband signal, a target signal correlated parameter corresponding to the target baseband signal, the target signal correlated parameter including at least one of a signal feature parameter corresponding to the target baseband signal or a signal feature parameter of a carrier signal corresponding to the target baseband signal, and a corresponding target sideband suppression parameter according to the target signal correlated parameter; performing signal correction on the target baseband signal based on the target sideband suppression parameter, to obtain a target corrected baseband signal, the target sideband suppression parameter being used for suppressing a power of a first suppression sideband corresponding to the target baseband signal; and inputting the target corrected baseband signal to a modulator for signal modulation, to obtain a target modulation signal corresponding to the target baseband signal.