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首页> 外文期刊>IEEE Transactions on Vehicular Technology >Channel Tracking and Signal Detection for MC-CDMA in a Time-Varying Environment
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Channel Tracking and Signal Detection for MC-CDMA in a Time-Varying Environment

机译：时变环境中MC-CDMA的信道跟踪和信号检测

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摘要

In this paper, a joint channel estimation and multiuser detection method is presented for uplink multicarrier code-division multiple access systems in time-varying environments. Unlike the conventional channel-tracking schemes, which generally need to insert pilot signals in every orthogonal frequency-division multiplexing symbol, the proposed approach requires only one pilot symbol at the beginning of each data frame. Based on the fact that the channel coefficients of two successive symbols are highly correlated, subsequent channel tracking and signal detection are recursively carried out. A major feature of the proposed approach is that it enables robust error propagation control and is capable of effectively detecting and tracking abrupt channel changes. Simulation examples demonstrate the robustness of the proposed algorithms.
机译：针对时变环境下的上行多载波码分多址系统，提出了一种联合信道估计和多用户检测的方法。与通常需要在每个正交频分复用符号中插入导频信号的常规信道跟踪方案不同，所提出的方法在每个数据帧的开头仅需要一个导频符号。基于两个连续符号的信道系数高度相关的事实，递归地执行随后的信道跟踪和信号检测。所提出的方法的主要特征是，它能够进行鲁棒的错误传播控制，并且能够有效地检测和跟踪突然的信道变化。仿真实例证明了所提出算法的鲁棒性。

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