Fast algorithms for single frequency estimation

Fast algorithms for single frequency estimation
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单频估计的快速算法

DOI:
10.1109/tsp.2006.870549
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发表时间:
2006
影响因子:
5.4
通讯作者:
J. Klein
J. Klein
中科院分区:
工程技术1区
文献类型:
--
作者:
J. Klein

文献摘要

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在本文中,提出了一些新的单个复正弦波频率估计器。 Crozier 的旋转相加抽取 (RAD) 方法首先经过改进,以更接近 Cramer-Rao Bound (CRB)。额外的修改产生了一个无偏估计器 (ERAD),它基本上使 CRB 高于与 RAD 相当的信噪比 (SNR) 阈值。此外,该估计器经证明可以实现高 SNR 的 CRB。 ERAD 方法需要大约 2N 次复数乘加和 log/sub 2/N 反正切。提出了一种改进的 ERAD (MERAD),它与 ​​RAD 方法的 SNR 阈值和计算复杂度(大约 3N 复数乘加和 log/sub 2/N 反正切)相匹配,但实现了高 SNR 的 CRB。
In this paper, some new estimators of the frequency of a single complex sinusoid are presented. The rotate-add-decimate (RAD) method of Crozier is first refined to more closely approach the Cramer-Rao Bound (CRB). An additional modification yields an unbiased estimator (ERAD) that essentially achieves the CRB above a signal-to-noise ratio (SNR) threshold comparable to that of RAD. In addition, this estimator is proven to achieve the CRB for high SNR. The ERAD method requires approximately 2N complex multiply-adds and log/sub 2/N arctangents. A modified ERAD (MERAD) is proposed that matches the SNR threshold and computational complexity of the RAD method (approximately 3N complex multiply-adds and log/sub 2/N arctangents) but achieves the CRB for high SNR.