Cramer-Rao bounds of SNR estimates for BPSK and QPSK modulated signals

被引：109

作者：

Alagha, NS ^{[1
]}

机构：

[1] EMS Technol Canada, St Anne De Bellevue, PQ H9X 3R2, Canada

来源：

IEEE COMMUNICATIONS LETTERS | 2001年 / 5卷 / 01期

关键词：

Cramer-Rao bound; Gaussian noise; parameter estimation; phase-shift keying;

D O I：

10.1109/4234.901810

中图分类号：

TN [电子技术、通信技术];

学科分类号：

0809 ;

摘要：

We derive Cramer-Rao lower bounds (CRLB's) for the estimation of signal-to-noise ratio (SNR) of binary phase-shift keying (BPSK) and quaternary phase-shift keying (QPSK) modulated signals. The received signal is corrupted by additive white Gaussian noise (AWGN), The lower bounds are derived for non-data-aided estimation where the transmitted symbols are unknown at the receiver. The bounds are compared to those for data-aided estimations (known symbols at the receiver). It is shown that at low SNR there is a significant difference between the bounds for non-data-aided and data-aided estimations.

引用

页码：10 / 12

页数：3