Title :
Design optimization of iterative receivers
Author :
Salari, S. ; Meghdadi, V. ; Cances, J.-P.
Author_Institution :
Fac. of Electr. Eng., K.N. Toosi Univ. of Technol., Tehran, Iran
Abstract :
In this paper, we consider design optimization of low-density parity-check (LDPC) coded multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems for high data rate wireless transmission. First, starting from the maximum-likelihood (ML) principle, we devise a novel expectation-maximization (EM)-based scheme for joint estimation of carrier frequency-offset (CFO) and channel coefficients in MIMO-OFDM systems. Based on simulation results, the performance of joint estimator is quite satisfying. Then, this CFO estimator is incorporated into the initialization step of the turbo receiver. Experimental results show the effectiveness of our receiver design in combating CFO over unknown frequency selective fading channels.
Keywords :
MIMO communication; OFDM modulation; channel estimation; expectation-maximisation algorithm; fading channels; parity check codes; radio receivers; MIMO; OFDM; carrier frequency offset; channel coefficients; design optimization; expectation maximization; frequency selective fading channel; iterative receiver; joint estimation; low density parity check code; maximum likelihood principle; multiple input multiple output system; orthogonal frequency division multiplexing system; wireless transmission; Artificial neural networks; Channel estimation; Decoding; Estimation; Frequency modulation; OFDM; Carrier frequency offset (CFO); channel estimation; low-density parity-check (LDPC) codes; multiple-input multiple-output (MIMO); orthogonal frequency-division multiplexing (OFDM); turbo receiver;
Conference_Titel :
Turbo Codes and Iterative Information Processing (ISTC), 2010 6th International Symposium on
Conference_Location :
Brest
Print_ISBN :
978-1-4244-6744-0
Electronic_ISBN :
978-1-4244-6745-7
DOI :
10.1109/ISTC.2010.5613819
