Title :
MLSE for correlated diversity sources and unknown time-varying frequency-selective Rayleigh-fading channels
Author :
Hart, Brian D. ; Taylor, Desmond P.
Author_Institution :
Res. Sch. of Inf. Sci., Australian Nat. Univ., Canberra, ACT, Australia
fDate :
2/1/1998 12:00:00 AM
Abstract :
Yu and Pasupathy (see ibid., vol.43, p. 1534-44, 1995) derived a maximum-likelihood sequence estimation (MLSE) receiver structure for unknown time varying frequency-selective Rayleigh-fading channels and uncorrelated diversity sources. This receiver design is extended to the case of correlated diversity sources. Correlated diversity sources typically arise with space diversity, where constraints on antenna volume require that diversity antennae be placed too closely together. Analytic and simulated bit-error rate (BER) curves are presented for receivers which exploit and ignore the correlation. In the former case, we find a small BER improvement that reduces with decreasing correlation. However, for a fixed receiver complexity, superior performance is achieved when the correlation is ignored
Keywords :
Rayleigh channels; coding errors; correlation methods; diversity reception; error statistics; fading; maximum likelihood detection; maximum likelihood estimation; radio receivers; sequences; time-varying channels; BER curves; MLSE receiver; Rayleigh-fading channels; correlated diversity sources; diversity antennas; maximum-likelihood detector; maximum-likelihood sequence estimation; performance; receiver complexity; receiver design; simulated bit-error rate; space diversity; time-varying frequency-selective channels; uncorrelated diversity sources; AWGN; Additive white noise; Bit error rate; Diversity methods; Frequency diversity; Frequency estimation; Maximum likelihood detection; Maximum likelihood estimation; Pulse shaping methods; Rayleigh channels;
Journal_Title :
Communications, IEEE Transactions on
