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

Author

Alagha, Nader Sheikholeslami

Author_Institution

EMS Technol. Canada, STe-Anee-de-Bellevue, Que., Canada

Volume

5

Issue

1

fYear

2001

Firstpage

10

Lastpage

12

Abstract

We derive Cramer-Rao lower bounds (CRLBs) 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.

Keywords

AWGN; parameter estimation; quadrature phase shift keying; AWGN; BPSK; Cramer-Rao bounds; QPSK; SNR estimates; SNR estimation; additive white Gaussian noise; binary phase-shift keying; data-aided estimation; low SNR; lower bounds; modulated signals; nondata-aided estimation; quaternary phase-shift keying; received signal; receiver; signal-to-noise ratio; transmitted symbols; AWGN; Additive white noise; Binary phase shift keying; Cramer-Rao bounds; Equations; Phase estimation; Phase modulation; Phase shift keying; Quadrature phase shift keying; Signal to noise ratio;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/4234.901810

Filename

901810