A radio transceiver that includes a multi-channel receiver, a multi-channel transmitter and a controller is disclosed. The multi-channel receiver can be configured to concurrently receive first data frames, each including: (a) first data slots that are received over a first frequency channel that is variable between the first data slots, and (b) an error correction code (ECC). Concurrently, the multi-channel transmitter can be configured to transmit second data frames, each including second data slots that are transmitted over a second frequency channel that is variable between the second data slots, the first frequency channel and the second frequency channel being within a common frequency band. The controller can be configured to use the ECC of a respective first data frame of the first data frames to correct self-interference-based errors in the respective first data frame resulting from the transmission of one or more of the second data frames.

A radio transceiver that includes a multi-channel receiver, a multi-channel transmitter and a controller is disclosed. The multi-channel receiver can be configured to concurrently receive first data frames, each including: (a) first data slots that are received over a first frequency channel that is variable between the first data slots, and (b) an error correction code (ECC). Concurrently, the multi-channel transmitter can be configured to transmit second data frames, each including second data slots that are transmitted over a second frequency channel that is variable between the second data slots, the first frequency channel and the second frequency channel being within a common frequency band. The controller can be configured to use the ECC of a respective first data frame of the first data frames to correct self-interference-based errors in the respective first data frame resulting from the transmission of one or more of the second data frames.

This application provides a full-duplex self-interference weakening method and a full-duplex self-interference weakening system. The full-duplex self-interference weakening method includes: separately receiving, by a first port of a dual-polarized receive antenna and a second port of the dual-polarized receive antenna, a signal sent by a transmit antenna and adjusting and combining the signal received by the first port of the dual-polarized receive antenna and/or the signal received by the second port of the dual-polarized receive antenna, to weaken interference caused by the transmit antenna to the dual-polarized receive antenna. The full-duplex self-interference weakening method and the full-duplex self-interference weakening system provided in this application resolve a problem that a quantity of antennas and an antenna location are limited in an existing antenna interference cancelation method.

Amplitude-to-phase (AM-PM) error correction in a transceiver circuit is provided. The transceiver circuit is configured to generate a radio frequency (RF) signal from a time-variant input vector for transmission in one or more transmission frequencies. In embodiments disclosed herein, the transceiver circuit is configured to determine a phase correction term from the time-variant input vector and apply the determined phase correction term to the time-variant input vector to thereby correct an AM-PM error(s) in the RF signal. By correcting the AM-PM error(s) in the transceiver circuit, it is possible to prevent undesired amplitude distortion and/or spectrum regrowth in any of the transmission frequencies, particularly when the RF signal is modulated across a wide modulation bandwidth (e.g., ≥ 200 MHz).

Amplitude-to-phase (AM-PM) error correction in a transceiver circuit is provided. The transceiver circuit is configured to generate a radio frequency (RF) signal from a time-variant input vector for transmission in one or more transmission frequencies. In embodiments disclosed herein, the transceiver circuit is configured to determine a phase correction term from the time-variant input vector and apply the determined phase correction term to the time-variant input vector to thereby correct an AM-PM error(s) in the RF signal. By correcting the AM-PM error(s) in the transceiver circuit, it is possible to prevent undesired amplitude distortion and/or spectrum regrowth in any of the transmission frequencies, particularly when the RF signal is modulated across a wide modulation bandwidth (e.g., ≥ 200 MHz).

An electronic device may include: an antenna; a radio frequency integrated circuit (RFIC) configured to: generate a first radio frequency (RF) signal in a first frequency band to be used in cellular communication by mixing a first baseband signal with a first reference signal, output the first RF signal to the antenna, receive, from the antenna, a second RF signal in a second frequency band to be used in the cellular communication, generate a second baseband signal by mixing the second RF signal with a second reference signal, and output the second baseband signal; and a processor is configured to: obtain, from the second baseband signal output by the RFIC, a control signal for establishing a communication channel between a base station and the electronic device, identify, from the control signal, a first condition for causing desense of the second RF signal, and based on the first condition being satisfied, adjust a frequency of the first reference signal.

An antenna of a communication device includes a first antenna element operatively coupled to a transmitter of the communication device, the first antenna element configured to radiate a first signal generated by the transmitter; a second antenna element operatively coupled to a receiver of the communication device, the second antenna element configured to receive signals; and at least one third antenna element operatively coupled to at least one first reactive load, the at least one third antenna element configured to radiate a second signal modified in accordance with the at least one first reactive load, the second signal being induced at the at least one third antenna element by the first signal, and the at least one first reactive load being configured to modify the second signal to destructively cancel with a third signal induced at the second antenna element by the first signal.

An echo cancellation method and a transceiver to reduce dependence of a system on an enob of a DAC, and improve performance of echo cancellation. The transceiver includes an echo cancellation apparatus, a transmit link, a receive link, and a hybrid circuit. The transmit link and the receive link are coupled to a transmission line by using the hybrid circuit. The echo cancellation apparatus includes a first signal converter, a slicer, a first subtractor, a second digital-to-analog converter, a second subtractor, and a third subtractor.

An echo cancellation method and a transceiver to reduce dependence of a system on an enob of a DAC, and improve performance of echo cancellation. The transceiver includes an echo cancellation apparatus, a transmit link, a receive link, and a hybrid circuit. The transmit link and the receive link are coupled to a transmission line by using the hybrid circuit. The echo cancellation apparatus includes a first signal converter, a slicer, a first subtractor, a second digital-to-analog converter, a second subtractor, and a third subtractor.

An apparatus is disclosed for passive intermodulation distortion filtering. The apparatus includes a radio-frequency front-end circuit. The radio-frequency front-end circuit includes a transmit filter circuit and a receive filter circuit. The transmit filter circuit includes a passive circuit configured to combine at least two radio-frequency transmit signals associated with different transmit frequency bands. The transmit filter circuit also includes a filter coupled between the passive circuit and a first feed of an antenna. The filter is configured to attenuate frequencies associated with a receive frequency band. The receive filter circuit is coupled to a second feed of the antenna and is configured to pass the frequencies associated with the receive frequency band.