Device and cancellation method capable of adaptively cancelling receiving out-of-band interference in wireless transceiver system

Abstract

The invention discloses a device capable of adaptively cancelling receiving out-of-band interference in a wireless transceiver system. The function of the device is that signals coupled from a radio frequency transceiving channel are filtered by a wave trap to remove transmitting signals, and then the signals are amplified and split by a power splitter, one path of signals enter a cancellation circuit after being delayed, and the other path of receiving signals generated by a receiving signal generation unit are cancelled with original receiving signals in the cancellation circuit after amplitude modulation / phase modulation; a data processing unit adjusts an amplitude modulation phase modulator according to the sizes of the signals detected by a receiving signal detection circuit until thereceiving signals are smaller than a preset value; and then the data processing unit adjusts the amplitude and phase of cancellation interference signals according to the sizes of the receiving interference signals that are detected, and feeds back the adjusted interference signals to a receiving main channel to cancel the interference signals in the main channel. Thereby, the problem of the interference to the receiving main channel can be solved; and according to the scheme of the application, the receiving interference signals can be adaptively cancelled according to the changes of the receiving interference signals, and the shortcoming that a traditional filter cannot adaptively filter out the interference with the changes of the interference signals can be overcome.

Description

technical field [0001] The present application relates to the field of communication technology, in particular to a device and method for adaptively canceling out-of-band interference in a wireless transceiver system. Background technique [0002] With the continuous upgrading of wireless communication networks and the rapid development of the Internet of Things, the number of wireless communication networks of various frequency bands and standards has increased sharply, and the interference between wireless networks and networks has become increasingly severe. The design of radio frequency design and network planning pose serious challenges. [0003] The wireless equipment of the existing network solves the problem of mutual interference between networks by adding an anti-interference filter inside or outside the equipment. However, limited by the characteristics of the filter material itself, it is difficult to design the near-end suppression performance in the design pro...

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Problems solved by technology

However, limited by the characteristics of the filter material itself, it is difficult to design the near-end suppression performance in the design process of various filters. Interference is difficult to filter out. On the other hand, the suppression characteristics of existing filters at each frequency point are fixed, and cannot be adaptively changed with the different interference frequencies and signal strengths of wireless equipment application sites. Therefore, once the on-site band The external interference is changing, and the use of filters cannot solve the problem of out-of-band interference received by the on-site base station, which leads to the deterioration of the receiving sensitivity of the base station and affects the coverage and call quality of the base station. Therefore, how to provide a frequency and power adaptive The low-cost, high-efficiency, high-rejection ratio base station system receiving out-of-band interference cancellation device is imminent and imperative

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