具有迭代多用户检测和解码的turbo编码多载波CDMA性能

Canadian Conference on Electrical and Computer Engineering 2001. Conference Proceedings (Cat. No.01TH8555) Pub Date : 2001-05-13 DOI:10.1109/CCECE.2001.933667

P. Kafle, A. Sesay

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引用次数: 10

摘要

对具有迭代多用户检测的turbo编码MC-CDMA上行链路的性能进行了评价。利用多用户信号结构和从信道解码器获得的所有其他用户的码位的先验信息，基于最大后验准则计算最优似然比。MC-CDMA将turbo编码与多用户检测相结合，只需少量的联合检测和解码迭代，就能显示出接近单用户绑定的性能。此外，还实现了一种基于软干扰抵消的次优上行传输方法，并与传统方法进行了比较。给出了一种典型数据传输方案在瑞利多径衰落环境下的仿真结果。

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Performance of turbo coded multicarrier CDMA with iterative multiuser detection and decoding

The performance of a turbo coded MC-CDMA uplink with iterative multiuser detection is evaluated. Optimal likelihood ratios are computed based on the maximum a posteriori criterion using the multiuser signal structure and a priori information of code bits of all other users available from channel decoders. Combining turbo coding and multiuser detection in MC-CDMA has shown performance close to the single user bound with a few iterations of joint detection and decoding. Additionally, a suboptimal approach using soft interference cancellation is also implemented for the uplink transmission and compared with the conventional methods. Simulation results are presented in a Rayleigh multipath fading environment for a typical data transmission scheme.

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Canadian Conference on Electrical and Computer Engineering 2001. Conference Proceedings (Cat. No.01TH8555)

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