Title :
Union Bounds for BER Evaluation and Code Optimization of Space-Time codes in 2-by-2 MIMO systems
Author :
Zhang, Z. ; Cheung, S.W. ; Yuk, T.I. ; Kuo, H.
Author_Institution :
Dept. of Electron. & Electr. Eng., Hong Kong Univ.
Abstract :
n this paper, an exact closed-form formula for the pair-wise error probability (PEP) is derived for two transmit and two receive antennas MIMO systems using the probability density function (PDF) of the modified Euclidean distance. An exact union bound formed by this formula, together with the asymptotic union bound, are studied for optimization and bit-error rate (BER) evaluation of space-time (S-T) codes. Numerical calculations and Monte Carlo computer simulation have been used to study these two union bounds on a 2-by-2 MIMO system using a rotation-based diagonal S-T code (D code) in a block fading channel. Results show that the exact union bound is a very tight bound for BER evaluation while the asymptotic union bound is very accurate for code optimization
Keywords :
MIMO systems; Monte Carlo methods; antenna arrays; error statistics; fading channels; space-time codes; BER evaluation; MIMO systems; Monte Carlo computer simulation; asymptotic union bound; bit-error rate; block fading channel; code optimization; modified Euclidean distance; pair-wise error probability; probability density function; receive antennas; space-time codes; transmit antennas; Bit error rate; Computer simulation; Euclidean distance; Fading; MIMO; Monte Carlo methods; Pairwise error probability; Probability density function; Receiving antennas; Space time codes; MIMO; Space-Time codes; Union Bound;
Conference_Titel :
Vehicular Technology Conference, 2006. VTC 2006-Spring. IEEE 63rd
Conference_Location :
Melbourne, Vic.
Print_ISBN :
0-7803-9391-0
Electronic_ISBN :
1550-2252
DOI :
10.1109/VETECS.2006.1683087
