Title :
Rate-adaptive M-QAM in MIMO diversity systems using space-time block codes
Author :
Maaref, Amine ; Aissa, Sonia
Author_Institution :
INRS-EMT, Quebec Univ., Montreal, Que., Canada
Abstract :
In this contribution, we first derive the Shannon capacity of MIMO orthogonal space-time block coding (STBC) in Rayleigh fading, expressing it in closed-form as function of the number of transmit and receive antennas, and the average received signal-to-noise ratio (SNR). We then assess the performance of M-ary quadrature amplitude modulation (M-QAM) used in conjunction with STBC. The performance of this rate adaptive policy is evaluated in terms of its induced average bit error rate and average spectral efficiency, the latter being compared to the derived Shannon capacity which represents the upper bound on the achievable spectral efficiency for any practical approach to adaptive modulation (AM) using STBC.
Keywords :
MIMO systems; Rayleigh channels; adaptive modulation; antenna arrays; block codes; error statistics; quadrature amplitude modulation; receiving antennas; space-time codes; transmitting antennas; M-ary quadrature amplitude modulation; MIMO diversity system; Rayleigh fading; Shannon capacity; adaptive modulation; bit error rate; multiple-input multiple-output; rate-adaptive M-QAM; receiving antenna; signal-to-noise ratio; space-time block code; transmitting antenna; Bit error rate; Block codes; Channel capacity; Fading; MIMO; Rayleigh channels; Receiving antennas; Signal to noise ratio; Transmitting antennas; Upper bound;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2004. PIMRC 2004. 15th IEEE International Symposium on
Print_ISBN :
0-7803-8523-3
DOI :
10.1109/PIMRC.2004.1368727
