Title :
Performance analysis of MAP decoded space-time orthogonal block codes for non-uniform sources
Author :
Behnamfar, Firouz ; Alajaji, Fady ; Linder, Tamas
Author_Institution :
Dept. of Electr. & Comput. Eng., Queen´´s Univ., Canada
Abstract :
We derive a closed-form expression for the exact pairwise error probability (PEP) of a non-uniform memoryless binary source transmitted over a Rayleigh fading channel using space-time orthogonal block codes and maximum a posteriori (MAP) detection. The expression is easy to evaluate and holds for any signaling scheme. We then use this result to minimize the bit error rate of the binary antipodal signaling scheme. Numerical results for the case of binary antipodal signaling (BPSK and optimal) verify the accuracy of our formula and quantify substantial gains of MAP decoding over maximum likelihood (ML) decoding for sources with strong non-uniformity.
Keywords :
Rayleigh channels; block codes; error statistics; maximum likelihood decoding; maximum likelihood detection; minimisation; phase shift keying; space-time codes; telecommunication signalling; BER minimization; BPSK; MAP decoding; MAP detection; ML decoding; Rayleigh fading channel; binary antipodal signaling scheme; bit error rate minimization; closed-form expression; maximum a posteriori detection; maximum likelihood decoding; memoryless binary source; nonuniform sources; orthogonal codes; pairwise error probability; space-time codes; space-time orthogonal block codes; Bit error rate; Block codes; Constellation diagram; Error analysis; Fading; Maximum likelihood decoding; Pairwise error probability; Performance analysis; Receiving antennas; Transmitting antennas;
Conference_Titel :
Information Theory Workshop, 2003. Proceedings. 2003 IEEE
Print_ISBN :
0-7803-7799-0
DOI :
10.1109/ITW.2003.1216691
