| 多码CDMA系统中联合软并行干扰抵消与Turbo译码方法研究 |
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| 引用本文： | 胡文江.多码CDMA系统中联合软并行干扰抵消与Turbo译码方法研究[J].西安理工大学学报,2004,20(4):382-387. |
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| 作者姓名： | 胡文江 |
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| 作者单位： | 重庆邮电学院,通信与信息工程学院,重庆,400065 |
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| 摘 要： | 针对多码CDMA系统提出了一种联合软部分并行干扰抵消与Turbo译码估计方法。该方法首先通过线性最小均方误差均衡器(LMMSE)在切普级对接收到的多码CDMA信号进行均衡，然后使用Turbo译码后得到的软信息对干扰信号进行重构，最后通过并行干扰抵消(PIC)去除多码干扰(MCI)。仿真结果表明，经过多次迭代后，相比传统的部分并行干扰抵消，该方法可显著降低多码CDMA系统的误比特率。笔者同时还给出了切普级均衡、车速和PIC次数对多码CDMA系统性能的影响。
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| 关 键 词： | 多码CDMA 迭代信道译码 并行干扰抵消 |
| 文章编号： | 1006-4710(2004)04-0382-06 |
| 修稿时间： | 2004年4月15日 |
Study of Joint Soft Parallel Interference Cancellation and Turbo Decoder Method in Multicode CDMA System |
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| HU Wen-jiang.Study of Joint Soft Parallel Interference Cancellation and Turbo Decoder Method in Multicode CDMA System[J].Journal of Xi'an University of Technology,2004,20(4):382-387. |
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| Authors: | HU Wen-jiang |
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| Abstract: | A joint soft partial parallel interference cancellation (SP-PIC) and turbo channel decoder method for multicode CDMA system is proposed in this paper. Received signal is firstly equalized by the LMMSE chip equalizer, and then multicode cdma interference (MCI) is reconstructed by using soft information from data symbol after turbo decoder. Parallel interference cancellation (PIC) is adopted to multicode interference (MCI) at the end. Simulation results show that the error floor of the multicode CDMA system can be reduced significantly. |
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| Keywords: | multicode CDMA turbo channel decoder parallel interference cancellation |
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