Title :
Rate-diversity tradeoff of space-time codes with fixed alphabet and optimal constructions for PSK modulation
Author :
Lu, Hsiao-feng ; Kumar, P. Vijay
Author_Institution :
Dept. of Electr. Eng.-Syst., Univ. of Southern California, Los Angeles, CA, USA
Abstract :
We show that for any (Q×M) space-time code S having a fixed, finite signal constellation, there is a tradeoff between the transmission rate R and the transmit diversity gain ν achieved by the code. The tradeoff is characterized by R≤Q-ν+1, where Q is the number of transmit antennas. When either binary phase-shift keying (BPSK) or quaternary phase-shift keying (QPSK) is used as the signal constellation, a systematic construction is presented to achieve the maximum possible rate for every possible value of transmit diversity gain.
Keywords :
Rayleigh channels; diversity reception; optimisation; quadrature phase shift keying; space-time codes; transmitting antennas; BPSK; PSK modulation; QPSK; binary phase-shift keying; finite signal constellation; fixed alphabet; optimal construction; quasi-static Rayleigh fading; quaternary phase-shift keying; rate-diversity tradeoff; space-time codes; transmission rate; transmit antennas; transmit diversity gain; Binary phase shift keying; Constellation diagram; Diversity methods; Modular construction; Modulation coding; Phase shift keying; Quadrature phase shift keying; Receiving antennas; Space time codes; Transmitting antennas;
Journal_Title :
Information Theory, IEEE Transactions on
DOI :
10.1109/TIT.2003.817469
