Bayesian Cramer-Rao Bounds for Complex Gain Parameters Estimation of Slowly Varying Rayleigh Channel in OFDM Systems

Hussein Hijazi (1) , Laurent Ros (1)

1 GIPSA-C2S - GIPSA - Communication, Signal et Sécurité

This paper deals with on-line Bayesian Cramer-Rao (BCRB) lower bound for complex gains dynamic estimation of time-varying multi-path Rayleigh channel. We propose three novel lower bounds for 4-QAM OFDM systems in case of negligible channel variation within one symbol, and assuming both channel delay and Doppler frequency related information. We derive true BCRB for data-aided (DA) context and, two closed-form expressions for non-data aided (NDA) context.

Mots clés: Rayleigh complex gains; Bayesian Cramer-Rao Bound; OFDM; Rayleigh complex gains.

Domaines: Traitement du signal et de l'image [eess.SP]; Traitement du signal et de l'image [eess.SP]

Hussein Hijazi, Laurent Ros. Bayesian Cramer-Rao Bounds for Complex Gain Parameters Estimation of Slowly Varying Rayleigh Channel in OFDM Systems. Signal Processing, 2009, 89 (1), pp.111-115. ⟨10.1016/j.sigpro.2008.07.017⟩. ⟨hal-00325317⟩