基于循环平稳周期的交织差分最小均方误差多用户检测算法

doi:10.3969/j.issn.0255-8297.2012.05.005

Abstract

Abstract:

To suppress multiple access interference (MAI) in wide code division multiple access (WCDMA) systems in a fast fading channel, an interleaving differential MMSE multiuser detection method based on the cyclo-stationary period is proposed. According to typical characteristics of two-layered spreading modulation in WCDMA, the update criterion of coefficients is based on the cyclo-stationary period, instead of the spread factor. As the proposed method can characterize the pattern of MAI properly, improved performance can be achieved. Moreover, interleaving is involved to let the symbols with the same comprehensive spread sequence be transmitted consecutively to ensure that the channel gains of successive symbols keep constant in the fast fading channel. Simulation results show the performance is improved without increasing the system complexity, and Doppler shift is better dealt with.

Key words: wide code division multiple access (WCDMA), multiuser detection, differential minimum meansquare error (IDMMSE), cyclo-stationary period, interleave

CLC Number:

TN914.4

FENG Xing-le, LI Wei, JIANG Yun-guo. Interleaving Differential MMSE Multiuser Detection Based on Cyclic-stationary Period[J]. Journal of Applied Sciences, 2012, 30(5): 466-472.

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Interleaving Differential MMSE Multiuser Detection Based on Cyclic-stationary Period

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