Fast algorithms for single frequency estimation
Fast algorithms for single frequency estimation
复制标题
单频估计的快速算法
DOI:
10.1109/tsp.2006.870549
复制
发表时间:
2006
影响因子:
5.4
通讯作者:
J. Klein
中科院分区:
文献类型:
--
作者:
J. Klein
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.