2012•Applied Mechanics and MaterialsOpen access

Improved SNR Estimation Technique for BPSK and QPSK Signals

Guang Zu Liu, Jian Xin Wang

Abstract

To improve the estimation accuracy of non-data-aided (NDA) signal-to-noise ratio (SNR) estimators at low SNR value, A novel estimation technique for binary phase-shift keying and quadrature phase-shift keying signals in complex additive white Gaussian noise channel is proposed. The mathematical relation between SNR and the ratio of two simple statistical computations is derived, then SNR is determined by looking up a table. Its accuracy surpasses other NDA estimators, approaching closely to the Cramer-Rao lower bound at SNR > 5dB.

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Available abstract

Key concepts: Phase-shift keying, Estimator, Additive white Gaussian noise, Keying, Algorithm, Mathematics, Signal-to-noise ratio (imaging), Channel (broadcasting)