Title :
Transmit filter optimization based on partial CSI knowledge for wireless applications
Author :
Rey, Francesc ; Lamarca, Meritxell ; Vázquez, Gregori
Author_Institution :
Dept. of Signal Theor. & Commun., Univ. Politecnica de Catalonia, Barcelona, Spain
Abstract :
This paper deals with closed-loop schemes in OFDM modulation systems. A Bayesian approach is presented to design minimum BER prefiltering matrices in the presence of channel uncertainties. This formulation leads to a robust algorithm that exhibits lower sensitivity to channel estimation errors than classical schemes. The proposed design encompasses the single antenna transmission, the beamforming schemes and the frequency flat fading channels as particular cases.
Keywords :
Bayes methods; OFDM modulation; antenna arrays; channel estimation; digital filters; error statistics; fading channels; optimisation; receiving antennas; transmitting antennas; BER prefiltering matrices; Bayesian approach; OFDM modulation system; beamforming scheme; channel estimation error; channel status information knowledge; closed loop scheme; frequency flat fading channel; single antenna transmission; transmit filter optimization; wireless application; Array signal processing; Bayesian methods; Bit error rate; Channel estimation; Filters; OFDM modulation; Robustness; Transmitting antennas; Uncertainty; Wireless sensor networks;
Conference_Titel :
Communications, 2003. ICC '03. IEEE International Conference on
Print_ISBN :
0-7803-7802-4
DOI :
10.1109/ICC.2003.1204410
