Title :
Performance Optimization of Open-Loop MIMO Systems With Orthogonal Space–Time Block Codes
Author :
Sezgin, Aydin ; Jorswieck, Eduard A. ; Boche, Holger
Author_Institution :
Dept. of Broadband Mobile Commun. Networks, Fraunhofer Inst. for Telecommun., Berlin
Abstract :
In order to obtain full spatial diversity available in a multiple-input multiple-output (MIMO) system, orthogonal space-time block codes (OSTBC) are employed due to their low decoding complexity. However, the drawback of OSTBC is that the code rate decreases with increasing number of transmit antennas. Using a recent result on the properties of Gaussian quadratic forms, we show that an OSTBC for an odd number of transmit antennas is always outperformed in terms of different performance measures, namely, the outage probability, the outage mean-squared error (MSE), and the raw bit-error rate (BER), by an OSTBC for an even number of transmit antennas, which has a strong impact on the design and application of OSTBC
Keywords :
Gaussian processes; MIMO communication; antenna arrays; block codes; diversity reception; error statistics; mean square error methods; open loop systems; optimisation; orthogonal codes; probability; space-time codes; transmitting antennas; BER; Gaussian quadratic form; MSE; OSTBC; bit-error rate; decoding complexity; mean-squared error; multiple input multiple output system; open-loop MIMO systems; orthogonal space-time block code; outage probability; performance optimization; spatial diversity; transmitting antenna; Antenna measurements; Bit error rate; Block codes; Broadband communication; Decoding; Electronic mail; MIMO; Mobile communication; Optimization; Transmitting antennas; Bit-error rate (BER); mean-squared error (MSE); number of transmit antennas; orthogonal space–time block codes (OSTBC); outage;
Journal_Title :
Signal Processing Letters, IEEE
DOI :
10.1109/LSP.2006.881529
