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Algorithm and realization of self-adaptive parallel interference cancellation multi-user detector

A technology of multi-user detection and interference cancellation, applied in the field of multi-user detection devices, can solve the problems such as the degradation of detector performance, the effect of improving system performance not meeting system requirements, and the lack of real-time adjustment of detector parameters.

Inactive Publication Date: 2010-08-11
王伟 +2
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Problems solved by technology

Typical multi-user detection technologies do not have the ability to adjust the parameters of the detector in real time as the channel changes, so when the channel parameters change, the performance of the detector will be degraded, and its effect on system performance improvement cannot meet the system requirements

Method used

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  • Algorithm and realization of self-adaptive parallel interference cancellation multi-user detector
  • Algorithm and realization of self-adaptive parallel interference cancellation multi-user detector
  • Algorithm and realization of self-adaptive parallel interference cancellation multi-user detector

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Embodiment Construction

[0118] The concrete realization process of the present invention is described in detail below in conjunction with accompanying drawing:

[0119] Maritime radio navigation system is greatly affected by multiple access interference, and the improvement effect of typical multi-user detectors on the system bit error rate cannot meet the system requirements. The system model given in the present invention only considers the situation of receiving three interference signals from navigation stations at the same time. Figure 5 Basic block diagram for an adaptive parallel interference cancellation detector implementation.

[0120] The self-adaptive parallel interference cancellation multi-user detector in the figure is composed of two main modules, which are "adaptive module" and "parallel interference cancellation module". The "parallel interference cancellation module" is a single-stage parallel interference cancellation detector. Its composition mainly includes five parts: index,...

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Abstract

The invention relates to an algorithm and realization of a self-adaptive parallel interference cancellation multi-user detector. The invention is mainly used on a marine radio navigation system based on a spread spectrum system and realizes the goal of providing a multi-user detector based on a self-adaptive parallel interference cancellation multi-user detection algorithm under time-varying channel conditions, wherein the multi-user detector has the advantages that the system error rate is effectively reduced and the system performance is practically improved. The invention is mainly formed by two modules, i.e. a self-adaptive module and a parallel interference cancellation module, wherein the self-adaptive module can enable a system to adapt to a time-varying channel through adjusting the parameter of the system in real time; and the parallel interference cancellation module reconstructs interference signals and cancels the interference signals in the received signals to reach the goals of reducing the error rate and improving the system performance.

Description

(1) Technical field [0001] The invention relates to a novel multi-user detection device, in particular to an adaptive parallel interference cancellation multi-user detector. (2) Background technology [0002] Multi-user detection technology is an application technology aimed at eliminating or reducing multiple access interference between different transmitted signals in a spread spectrum system. In 1979, K.S.Schneide proposed a synchronous CDMA system multi-user detection algorithm for satellite communication, but it did not attract widespread attention from the industry at that time. Until 1984, Verdu proposed and analyzed the Optimum DetectorMultiuser Detector and the Maximum Likelihood Sequence Detector in his doctoral dissertation; in 1986, Verdu used the decomposability of the logarithmic likelihood function to demonstrate that The optimal multi-user detector in CDMA system can be composed of matched filter followed by Viterbi decoder, and this technology has attracted...

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Application Information

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IPC IPC(8): H04B1/707H04B1/10
Inventor 王伟刘洋赵荣李欣
Owner 王伟
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