Self-adaption radio frequency interference offsetting device, method and receiver

Abstract

The invention relates to the technical field of mobile communication and provides a self-adaption radio frequency interference offsetting device, method and receiver and a wireless full-duplex communication system. The device comprises an amplitude and phase adjusting module, a subtractor and a baseband extracting and filtering module. The amplitude and phase adjusting module is used for adjusting the amplitude and the phase of radio frequency reference signals and outputting radio frequency adjusting signals to enable the radio frequency adjusting signals to be collected in self-interference signals of radio frequency receiving signals. The subtractor is used for outputting radio frequency residue signals which are the difference value signals between the radio frequency receiving signals and the radio frequency reference signals. The baseband extracting and filtering module is used for receiving the radio frequency reference signals and radio frequency residue signals outputted from the subtractor and extracting the baseband signals. The baseband signals are processed in a minimum mean square self-adaption filtering mode to obtain amplitude phase control signals which are outputted to the amplitude and phase adjusting module. The self-adaption radio frequency interference offsetting device, method and receiver adopt an LMS self-adaption filtering algorithm, so that the convergence rate is higher and the estimation results are more accurate.

Description

technical field [0001] The invention belongs to the technical field of wireless full-duplex systems, and in particular relates to an adaptive radio frequency interference cancellation device, method and receiver. Background technique [0002] In mobile cellular communication systems, wireless local area network (Wireless Local Area Network, WLAN), fixed wireless access (Fixed Wireless Access, FWA) and other wireless communication systems, the base station (Base Station, BS) or access point (Access Point, AP ), relay stations (Relay Station, RS) and user equipment (User Equipment, UE) and other communication nodes usually have the ability to transmit their own signals and receive signals from other communication nodes. 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 reaches the receiving end. The signal is already very weak. For example, the power difference...

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Problems solved by technology

[0006] In view of the above problems, the object of the present invention is to provide an adaptive radio frequency interference cancellation device, method, receiver and wireless full-duplex communication system, aiming to solve the problem of convergence speed in the existing self-interference cancellation search method based on RSSI detection Slow, technical problems with inaccurate estimation of the amplitude and phase of the self-interfering signal relative to the RF reference signal

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