Digital interference cancellation device and method for wireless full-duplex system and transceiver

Abstract

The present invention discloses a digital interference cancellation apparatus, including: a first interference cancellation module, configured to receive a digital transmission signal output by a transceiver as a digital baseband reference signal, reconstruct a first self-interference signal by using the digital baseband reference signal, and subtract the first self-interference signal from a digital receiving signal received from the transceiver to obtain a digital receiving signal after a first stage of interference cancellation; and a second interference cancellation module, configured to receive the digital transmission signal output by the transceiver as the digital baseband reference signal, reconstruct a second self-interference signal by using the digital baseband reference signal, and subtract the second self-interference signal from the digital receiving signal after the first stage of interference cancellation to obtain a digital receiving signal after a second stage of interference cancellation. The embodiments of the present invention further disclose a digital interference cancellation method, a wireless full duplex system and a transceiver. By adopting the embodiments of the present invention, self-interference signals in a digital receiving signal can be effectively eliminated in a complex communication environment.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a digital interference canceling device and method for a wireless full-duplex system and a transceiver. Background technique [0002] In mobile cellular communication systems, WLAN (Wireless Local Area Network, wireless local area network), FWA (Fixed Wireless Access, fixed wireless access) and other wireless communication systems, BS (Base Station, base station), AP (Access Point, access point ), RS (Relay Station, relay station) and UE (User Equipment, user equipment) and other communication nodes generally have the capability of transmitting their own signals and receiving signals of other communication nodes. [0003] Because the attenuation of the wireless signal in the wireless channel is very large, compared with its own transmission signal, the signal from the communication peer is very weak when it reaches the receiving end. For example, in a mobile cellular commu...

AI Technical Summary

Problems solved by technology

[0005] However, since the same wireless channel is used to receive and transmit signals, the interference of the transmitted signal to the received signal in the wireless full-duplex transceiver (called self-interference, Self-interference) is relatively strong, and the correct reception of useful signals cause a certain impact

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