Multi-user interference elimination method and system

Abstract

The invention discloses a multi-user interference elimination method. The method comprises: generating analog signals according to set parameters and related parameters appointed by users, demodulating and recovering analog learning signals to obtain single-user recovery signals; calculating the analog learning signals and the single-user recovery signals according to a preset algorithm to obtain the delay values of the single-user recovery signals relative to the analog learning signals; obtaining the delay calculation results of appointed users according to the delay values; obtaining the delay calculation result of every appointed user; taking the maximum in the delay calculation results as a calculation reference value; adjusting the multi-user signals and the single-user recovery signals to align in time delay according to the reference value. Through the method provided by the embodiment of the invention, estimation and recovery are automatically realized, every user signal and the receiving signal are caused to strictly align in time, and therefore, the expandable general multi-user interference processing system compatible with different users is realized.

Description

technical field [0001] The present application relates to the field of communication technologies, and in particular to a multi-user interference elimination method and system. Background technique [0002] Since the Code Division Multiple Access (English: CodeDivisionMultipleAccess, referred to as: CDMA) system is a multiple access scheme of code division multiple access, in the actual system, intersymbol interference (ISO), multiple access interference (MAI) and the strong signal in the system to the weak Signal suppression (near-far effect) has become the main types of interference that must exist in CDMA systems. MAI restricts the capacity of the system, and ISO restricts the communication rate. The suppression of ISO can adopt equalization or diversity technology. MAI is generated because the user receiver cannot be completely synchronized and uses completely orthogonal spreading codes. There is a certain correlation between the user signals, resulting in multiple ac...

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Problems solved by technology

[0004] The embodiment of the present invention provides a method and system for eliminating multi-user interference, which is used to solve the problem that in the prior art, the key characteristics such as signal modulation mode, pseudo-code rate, and data rate are different, which will cause changes in its processing delay. Therefore, it is difficult to implement a general system that is compatible with different modulation methods, pseudo-code rates, and data rate signals for multi-user interference cancellation processing.

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