Title :
Improved SNR estimation for BPSK and QPSK signals
Author :
Ijaz, A. ; Awoseyila, A.B. ; Evans, Barry G.
Author_Institution :
Centre for Commun. Syst. Res. (CCSR), Univ. of Surrey, Guildford, UK
Abstract :
A novel non-data-aided SNR estimation technique for BPSK and QPSK modulations in complex additive white Gaussian noise (AWGN) is proposed. It uses the constant amplitude property of in-phase and quadrature components of these modulations to achieve an improved performance. Its complexity is shown to be lower while its accuracy supersedes the popular moments-based estimator, approaching closely to the Cramer-Rao lower bound.
Keywords :
AWGN channels; channel estimation; encoding; quadrature phase shift keying; BPSK; Cramer-Rao lower bound; QPSK signals; SNR estimation; additive white Gaussian noise;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2009.1759
