Abstract
We investigate in this paper the performance of orthogonal modulations with noncoherent multiple-symbol detection (MSD). It is shown that for uncoded systems, the asymptotic error performance of the MSD is almost as good as that of the ideal coherent detector. The application of MSD to the CDMA IS-95 reverse link, which represents a coded system, is also considered. The simulation results show that the MSD receiver is about 0.5 dB better than the conventional symbol-by-symbol detector in both the additive white Gaussian noise and Rayleigh fading channels. Finally, reduced-complexity MSD receivers with little performance degradation are also presented in this paper.
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