基于截断DCT展开的迭代相位噪声估计算法

J. Bhatti, N. Noels, M. Moeneclaey
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引用次数: 5

摘要

提出了两种用于单载波突发通信的相位噪声估计算法。第一种和第二种估计技术(分别表示为PEA1和PEA2)分别基于相位噪声和相应相量的截断离散余弦变换(DCT)基展开,不需要任何相位噪声统计知识。通过期望最大化算法迭代改进初始导频估计,得到软决策导向相位噪声估计。比较了PEA1和PEA2在均方相位误差和误码率方面的性能。数值结果表明,PEA2的信噪比实际值优于PEA1。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Algorithms for iterative phase noise estimation based on a truncated DCT expansion
We present two phase noise estimation algorithms for single-carrier burst communications. The first and second estimation techniques (denoted as PEA1 and PEA2 respectively) are based on a truncated discrete cosine transform (DCT) basis expansion of the phase noise and of the corresponding phasor, respectively and do not require any knowledge of the phase noise statistics. An initial pilot-based estimate is iteratively improved by means of the expectation-maximization algorithm, yielding a soft-decision-directed phase noise estimate. The performances of PEA1 and PEA2 are compared in terms of the mean-square phase error and bit-error rate. Numerical results show that PEA2 outperforms PEA1 for practical values of the signal-to-noise ratio.
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