Title :
Novel full-diversity high-rate STBC for 2 and 4 transmit antennas
Author :
Das, Sushanta ; Al-Dhahir, Naofal ; Calderbank, Robert
Author_Institution :
Philips Res., Briarcliff Manor, NY, USA
fDate :
3/1/2006 12:00:00 AM
Abstract :
We design a new rate-5/4 full-diversity orthogonal space-time block code (STBC) for QPSK and 2 transmit antennas (TX) by enlarging the signalling set from the set of quaternions used in the Alamouti code. Selective power scaling of information symbols is used to guarantee full-diversity while maximizing the coding gain (CG) and minimizing the transmitted signal peak-to-minimum power ratio (PMPR). The optimum power scaling factor is derived analytically and shown to outperform schemes based only on constellation rotation while still enjoying a low-complexity maximum likelihood (ML) decoding algorithm. Finally, we extend our designs to the case of 4 TX by enlarging the set of quasi-orthogonal STBC with power scaling. Extensions to general M-PSK constellations are straightforward.
Keywords :
antenna arrays; block codes; diversity reception; maximum likelihood decoding; minimisation; quadrature phase shift keying; space-time codes; transmitting antennas; Alamouti code; MPSK constellation; PMPR; QPSK; full-diversity orthogonal STBC; maximum likelihood decoding algorithm; minimization; multiple phase-shift keying; peak-to-minimum power ratio; power scaling factor; quadrature phase-shift keying; quaternion set; space-time block code; transmitting antenna; Algorithm design and analysis; Block codes; Character generation; Filtering; Matched filters; Maximum likelihood decoding; North America; Quadrature phase shift keying; Quaternions; Transmitting antennas;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2006.1603374
