Interleaving Differential MMSE Multiuser Detection Based on Cyclic-stationary Period
Received date: 2011-04-24
Revised date: 2011-09-11
Online published: 2012-09-22
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.
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 . DOI: 10.3969/j.issn.0255-8297.2012.05.005
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