Digital repeater station and self-excited eliminating method and device

Abstract

The present invention is suitable for communication field, and provides a digital repeater, a self-excitation counteracting method and a device thereof, wherein the device comprises the following components: a digital baseband signal collecting unit which is used for collecting and combining a first digital baseband signal and a second digital baseband signal to obtain an exercise reference digital baseband signal; an estimator which executes the nonlinear model estimation of transceiver coupling channel according to the exercise reference digital baseband signal to obtain each parameter of a nonlinear filter; the nonlinear filter which is used for executing self-adapting real-time operation to the input first digital baseband signal according to each obtained nonlinear filter parameter to obtain a baseband counteracting signal which reflects the nonlinear channel characteristic of the transceiver feedback channel; and a self-excitation counteracting unit which is used for executing signal counteracting according to the first baseband signal and the baseband counteracting signal. The method and device according to the invention estimate the nonlinear characteristic in the transceiver feedback channel thereby effectively reducing the effect of interfering signal and obtaining a better self-excitation counteracting effect.

Description

technical field [0001] The invention belongs to the communication field, and in particular relates to a digital repeater and a self-excited cancellation method and device thereof. Background technique [0002] The same-frequency wireless repeater usually uses a duplexer to switch the uplink and downlink, uses the forward antenna to receive the downlink signal of the base station, amplifies the useful signal through the low-noise amplifier, and then passes through the narrowband filter for multiple filtering, and further uses the power amplifier Amplify the power and transmit it to the mobile station from the rear antenna; at the same time, use the rear antenna to receive the uplink signal of the mobile station, and transmit it to the base station through the low noise amplifier, narrowband filter, and power amplifier. Its advantage is that the coverage area is expanded at an investment cost far lower than that of the base station, the installation conditions are simple, and ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a self-excited cancellation method, aiming to solve the problem that the existing digital repeater is difficult to offset the influence of non-linear factors such as power amplifier distortion generated between the transceivers of the same frequency wireless repeater on the wireless receiving signal The problem

Images