Method and device for eliminating interference

Abstract

The embodiment of the invention provides a method and device for eliminating interference. The method comprises the following steps: receiving a signal containing data of two users; and judging whether the signal is in a successive interference cancellation (SIC) mode or a voice services over adaptive multi-user orthogonal subchannels (VAMOS) mode, and calculating false inverse matrixes in real time to replace random-access memories (RAM) of the false inverse matrixes under the two modes. According to the embodiment of the invention, the false inverse matrix calculation can be carried out directly in accordance with training serial numbers corresponding to the two users, thus the RAMs of the false inverse matrixes are not required to carry out storage of the false inverse matrixes, and logical resources and cost are reduced; and in addition, the SIC mode is compatible with the VAMOS mode, thus the two modes share a set of logical resources, thereby not only solving the compatible problem of the SIC mode and the VAMOS mode, but also saving the cost.

Description

technical field [0001] The present invention relates to the communication field, in particular to an interference elimination method and device. Background technique [0002] The Global System for Mobile communication (Global System for Mobile, GSM), as a communication system with many users, has widely entered people's daily life. However, with the continuous increase of GSM users and base stations, as well as the expansion of UMTS and LTE networks, some GSM frequencies are reconfigured to UMTS, LTE, and GSM networks gradually change from limited coverage to limited interference. The interference capability has declined, and it is no longer able to meet the customer's requirements for continuous improvement of network capacity and quality. [0003] The existing Serial Interference Cancellation (Successive Interference Cancellation, SIC) technology can effectively solve the impact of limited interference on the GSM network. When there are two or more interferences, SIC can ...

AI Technical Summary

Problems solved by technology

[0004] However, the existing SIC technology and VAMOS technology using the pseudo-inverse matrix RAM scheme is unreasonable, because the digital signal processor (Digital Signal Processor, DSP) needs to issue 22×5×2×10×120=22264000bit data to the pseudo-inverse matrix RAM, that is, nearly 300,000 gates of logic resources are needed, of which 22×5 represents a pseudo-inverse matrix, and each group stores 2 pseudo-inverse matrices, each data 10bit, a total of 120 sets of results

However, in fact, only one set of results is needed each time interference cancellation is performed, that is, only 22×5×2×10=2200 bits of data need to be stored, and the logical resources of less than 10,000 gates

It can be seen that the existing SIC technology wastes a lot of logic resources, and the implementation cost is relatively high.

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