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In this paper, error performance of a coded cooperative relay system is investigated when channels have cascaded Nakagami distribution. By using general pairwise error probability upper bound of the system, code design criterion for the distributed space-time code is derived and using this criterion, 8-state distributed space-time trellis codes for 4-PSK and 8-PSK modulations are designed. The error performances of the new codes are evaluated by computer simulations and compared those of the corresponding codes.
Date of Conference: 22-24 April 2010