Abstract :
We propose a new space time transmit diversity (STTD) scheme for M (M≥4) transmit antennas and one receive antenna. The new diversity scheme belongs to the open loop class and consists of an extension to earlier work (see Alamouti, S M., IEEE JSAC, p.1451-8, 1998; Tarokh, V. et al., IEEE Trans. Inform. Theory, vol.45, no.4, p.1456-67, 1999; vol.44, no.2, p.744-65, 1998). The coding rate of the new scheme is one, and, in spite of the presence of intersymbol interference, it achieves, at least, full diversity after applying a multi-dimensional orthonormal rotation to the original constellation. Each sequence with an integer multiple of M received symbols is detected using a maximum likelihood decoding algorithm to get the estimated maximum likelihood sequence.
Keywords :
Rayleigh channels; block codes; diversity reception; intersymbol interference; maximum likelihood decoding; maximum likelihood estimation; mobile radio; space-time codes; Rayleigh fading; intersymbol interference; maximum likelihood decoding algorithm; maximum likelihood sequence; mobile terminal; multi-dimensional orthonormal rotation; receive antenna; space time block coding; space time coding; space time transmit diversity; transmit antennas; Block codes; Fading; Interference; Maximum likelihood detection; Mobile antennas; Multiaccess communication; Rayleigh channels; Receiving antennas; Slot antennas; Transmitting antennas;
