Title :
Cramer-Rao Bound for NDA SNR Estimates of Square QAM Modulated Signals
Author :
Bellili, Faouzi ; Stéphenne, Alex ; Affes, Sofiene
Author_Institution :
INRS-EMT, Montreal, QC
Abstract :
In this paper, we derive analytical expressions for the inphase/quadrature Cramer-Rao lower bounds (I/Q CRLB) for the non-data-aided (NDA) signal-to-noise ratio (SNR) estimation of square quadrature amplitude modulated (QAM) signals. The channel is supposed to be slowly time-varying so that it can be assumed constant over the observation interval. The signal is assumed to be corrupted by additive white Gaussian noise (AWGN). We will demonstrate that the shape of the bounds differs greatly as the modulation order changes.
Keywords :
AWGN channels; quadrature amplitude modulation; QAM signal; additive white Gaussian noise; channel; estimation of square quadrature amplitude modulated signal; inphase/quadrature Cramer-Rao lower bounds; nondata-aided signal-to-noise ratio; AWGN; Additive white noise; Amplitude estimation; Amplitude modulation; Binary phase shift keying; Communications Society; Quadrature amplitude modulation; Quadrature phase shift keying; Signal analysis; Signal to noise ratio;
Conference_Titel :
Wireless Communications and Networking Conference, 2009. WCNC 2009. IEEE
Conference_Location :
Budapest
Print_ISBN :
978-1-4244-2947-9
Electronic_ISBN :
1525-3511
DOI :
10.1109/WCNC.2009.4917650
