DS-CDMA系统中导频辅助空时估计的迭代干扰抵消方案

IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211) Pub Date : 2001-10-07 DOI:10.1109/VTC.2001.956585

L. Brunel, D. Mottier

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引用次数: 6

摘要

直接序列码分多址系统的迭代多用户干扰消除方案在合理的复杂度下具有良好的性能。我们研究了一种结合干扰消除、软输入软输出译码和波束形成的高效迭代方案。为了处理未知信道，我们在每次迭代中增加了导频辅助空时信道估计。这种迭代结构有两个优点:一是用于估计的观测信号从一次迭代到下一次迭代的干扰较少;二是可以使用编码位的软估计进行数据辅助估计。

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Iterative interference cancellation scheme with pilot-aided space-time estimation in DS-CDMA systems

Iterative multiuser interference cancellation schemes for direct sequence code division multiple access systems exhibit good performance results for a reasonable complexity. We study an efficient iterative scheme, combining interference cancellation, soft input soft output decoding and beamforming. To deal with unknown channels, we add a pilot-aided space-time channel estimation in each iteration. The iterative structure has two advantages: the observation signal used for estimation contains less interference from one iteration to the following and soft estimates of coded bits are available for data-aided estimation.

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IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211)

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