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arXiv 1102.1231cs.ITmath.IT
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冗余块传输系统中盲信道估计器的Cramer-Rao界

Cramer-Rao Bound for Blind Channel Estimators in Redundant Block Transmission Systems

Yen-Huan Li, Borching Su, Ping-Cheng Yeh

摘要:

在本文中,我们推导出的Cramer-Rao界(CRB)的盲信道估计在冗余块传输系统中,任何盲信道估计的均方误差的下限。导出的CRB对于任何满秩线性冗余预编码器都是有效的,包括零填充(ZP)和循环前缀(CP)预编码器。一个简单的形式的CRB的多个复杂的参数也推导和提出,这有利于CRB推导的问题的兴趣。推导出的CRB和现有的基于子空间的盲信道估计器的CP和ZP系统的性能之间的比较。数值结果表明,盲信道估计器的性能仍有一定的改进空间。

英文摘要:

In this paper, we derive the Cramer-Rao bound (CRB) for blind channel estimation in redundant block transmission systems, a lower bound for the mean squared error of any blind channel estimators. The derived CRB is valid for any full-rank linear redundant precoder, including both zero-padded (ZP) and cyclic-prefixed (CP) precoders. A simple form of CRBs for multiple complex parameters is also derived and presented which facilitates the CRB derivation of the problem of interest. A comparison is made between the derived CRBs and performances of existing subspace-based blind channel estimators for both CP and ZP systems. Numerical results show that there is still some room for performance improvement of blind channel estimators.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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