A method and relay device for reducing adjacent frequency interference

Abstract

The invention discloses a method for reducing adjacent frequency interference, comprising: a receiver acquires a first analog signal from a radio frequency front end of a transmitter, wherein the first analog signal is a signal transmitted by the transmitter, and the signal transmitted by the transmitter is The signal forms a self-interference signal at the antenna of the receiver; the analog-to-digital conversion is performed on the first analog signal to obtain the first digital signal; the receiver receives the second analog signal, and the second analog signal includes a useful signal and a self-interference signal; performing analog-to-digital conversion on the two analog signals to obtain a second digital signal; performing digital cancellation on the second digital signal and the first digital signal to obtain a useful digital signal in the second digital signal. The present invention reduces adjacent frequency interference from signal transmission to signal reception through signal processing, without increasing the installation distance between transceiver antennas, and can configure the backhaul link and the access link into adjacent frequency bands, improving the efficiency of the backhaul link. and access link configuration flexibility.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and relay equipment for reducing adjacent frequency interference. Background technique [0002] In a mobile communication network, wireless relay (relay) technology is mainly used for hotspot coverage, cell expansion, emergency, vehicle scenarios, and improving cell coverage. Such as figure 1 As shown, in the mobile communication network, the wireless relay device 101 can be divided into two parts, one part is used to communicate with the macro station, and the macro station is an evolved base station (evolved Node B, eNB) 102, and this part is called R- The other part of UE104 is used to communicate with user equipment (User Equipment, UE) 103, and this other part is called R-eNB105. The interface between the eNB and the relay device is a backhaul link, and the interface between the relay device and the UE is an access link. In practical applications, configur...

AI Technical Summary

Problems solved by technology

Compared with scheme 1, scheme 2 relatively reduces the spacing requirements between Rx and Tx, but still has a large requirement for spacing

In addition, due to the need to increase the filter, this will increase the volume of the relay equipment and increase the cost of the relay equipment, and when the volume of the equipment is required to be less than or equal to 0.5m 3 , the backhaul link and the access link must be separated by at least 5MHz, and the backhaul link and the access link cannot be configured as adjacent frequency bands, which will limit the flexibility of backhaul link and access link configuration

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