基于格基约减的扩频通信多址干扰抑制算法

doi:10.11999/JEIT161104

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Abstract

In the application of spread spectrum communication with limited wireless resource, Multiple Access Interference (MAI) is the main restraint element of the multiple user service capability and communication performance. Focusing on the MAI problem, lattice reduction theory is firstly applied to the MAI cancellation of spread spectrum communication. A lattice reduction aided multiple user detection method is proposed. With lattice reduction method, the orthogonality of the correlation matrix of multiple signals is improved. As a result, the error bit rate of Multiple User Detection (MUD) method is reduced, and near ML demodulation performance is reached with low complexity. High performance on near-far effect resistance is achieved with the algorithm. Contrary to the performance degradation of traditional MUD method in serious MAI scenario, lattice reduction aided multiple user detection method can maintain near ML performance. Transmission reliability, multiuser service capability and environment suitability of spread spectrum system can be improved remarkably with the algorithm.

Key words： Spread spectrum communication Multiple access interference Multiple user detection Lattice reduction Near-far effect

Received: 18 October 2016 Published: 06 April 2017

PACS:

TN914.42

Fund:

The National Natural Science Foundation of China (91638203), The National Key Research and Development Program (2016YFB0502102)

Corresponding Authors: BAO Yachuan E-mail: baoyachuan@126.com

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Cite this article:

BAO Yachuan,YU Baoguo. Lattice Reduction Aided Multiple Access Interference Cancellation Algorithm of Spread Spectrum Communication[J]. JEIT, 2017, 39(5): 1164-1169.

URL:

http://jeit.ie.ac.cn/EN/10.11999/JEIT161104 OR http://jeit.ie.ac.cn/EN/Y2017/V39/I5/1164

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