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首页> 外文期刊>Communications, IEEE Transactions on >Iterative Message Passing for Pilot-Assisted Multiuser Detection in MC-CDMA Systems
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Iterative Message Passing for Pilot-Assisted Multiuser Detection in MC-CDMA Systems

机译：MC-CDMA系统中用于飞行员辅助多用户检测的迭代消息传递

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摘要

Application of the belief propagation (BP) algorithm is proposed for pilot-assisted reception of multi-carrier code division multiple access systems where the input symbols are binary phase shift keying symbols. The proposed method utilizes a Bayesian network graph that includes channel parameters as explicit nodes representing random variables. Channel parameters in both frequency and time domains are included in the graph. The messages on the graph are obtained by making large system assumptions for the user symbols and Gaussian assumptions for the messages related to the channel parameters. Density evolution analysis is performed whose results match well with the simulation results. For the simulated scenario it is found that BP with the proposed graph outperforms channel estimation followed by graph based detection, and non-graph based iterative channel estimation.
机译：提出了信念传播（BP）算法的应用，用于输入符号为二进制相移键控符号的多载波码分多址系统的导频辅助接收。所提出的方法利用贝叶斯网络图，该贝叶斯网络图包括信道参数作为表示随机变量的显式节点。图中包括频域和时域中的通道参数。通过对用户符号进行大的系统假设并对与信道参数有关的消息进行高斯假设来获得图上的消息。进行密度演化分析，其结果与模拟结果非常吻合。对于模拟场景，发现带有建议图的BP优于信道估计，其后是基于图的检测和基于非图的迭代信道估计。

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