Direct blind multiuser detection for CDMA in multipath without channel estimation
Direct blind multiuser detection for CDMA in multipath without channel estimation
复制标题
多径中 CDMA 的直接盲多用户检测，无需信道估计
DOI：
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复制
发表时间：
2001
影响因子：
5.4
通讯作者：
H. Fan
中科院分区：
文献类型：
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作者：
Xiaohua Li;H. Fan
本文研究异步DS-CDMA系统在多径环境下的盲多用户检测问题。该算法仅利用期望用户的扩频码，首先通过多重线性预测估计信道矩阵的列向量子空间。然后，迫零检测器和MMSE检测器具有任意的延迟可以得到没有显式的信道估计。这避免了任何信道估计误差，并且所得到的方法因此更鲁棒且更准确。提出了相应的批处理算法和自适应算法。新算法具有极强的抗远近效应能力。仿真结果证明了这些方法的有效性。
We consider the blind multiuser detection problem for asynchronous DS-CDMA systems operating in a multipath environment. Using only the spreading code of the desired user, we first estimate the column vector subspace of the channel matrix by multiple linear prediction. Then, zero-forcing detectors and MMSE detectors with arbitrary delay can be obtained without explicit channel estimation. This avoids any channel estimation error, and the resulting methods are therefore more robust and more accurate. Corresponding batch algorithms and adaptive algorithms are developed. The new algorithms are extremely near-far resistant. Simulations demonstrate the effectiveness of these methods.