Joint detection algorithm for uplink of OFDM DS-CDMA systems over frequency-selective time-varying channels

被引：0
|
作者：
Peng, Yuexing [1 ]
Wu, Zhenyang [1 ]
Wang, Weixin [1 ]
Liu, Chen [1 ]
机构：
[1] Dept. of Radio Eng., Southeast Univ., Nanjing 210096, China
来源：
Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) | 2004年 / 34卷 / 03期
关键词：
Communication channels (information theory) - Computer simulation - Direct sequence systems - Doppler effect - Interference suppression - Orthogonal frequency division multiplexing;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A joint detection algorithm is proposed for the uplink of orthogonal frequency division multiplexing (OFDM) direct sequence code division multiple access (DS-CDMA) systems over frequency-selective time-varying (TV) channels. The multiuser detection is realized by the modified partial parallel interference cancellation (PPIC), and estimates TV channels aided by pilots. The proposed algorithm is tested by simulations under different work conditions, and simulation results show that it can compress multiple access interference (MAI) and correctly estimate TV channels when the speed of terminals is below 120 km/h. While the speed is over 250 km/h, the frequency offset caused by Doppler effect must be estimated and corrected to delete inter-carrier interference (ICI).
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页码：297 / 300
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