N-shift cross-orthogonal sequences
IEEE Transactions on Information Theory
Cooperative diversity in wireless networks: algorithms and architectures
Cooperative diversity in wireless networks: algorithms and architectures
Cooperative diversity in wireless networks: Efficient protocols and outage behavior
IEEE Transactions on Information Theory
Cooperative communication in wireless networks
IEEE Communications Magazine
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This paper introduces an implementation of a halfduplex decode-and-forward cooperative algorithm using the complete complementary code (CCC) sets. These code sets have an impulsive autocorrelation sum among each set and a cross correlation sum along the set size that vanishes for all shifts. Each user is assigned a set of spreading codes to spread his data and send each of the resulting signals on a different sub-band. The decode-and-forward cooperative procedure is applied and a receiver consisting of parallel branches matched filter followed by a λ-MRC combiner is used for detection. It is demonstrated that the probability of error performance of the proposed algorithm is very close to the performance of the analytical closed-form probability of error in similar transmission conditions. The algorithm is also compared with a noncooperative multiband direct-sequence code division multiple access (MB DS-CDMA) algorithm using the complete complementary sets. The simulation results illustrate the enhanced performance of the proposed algorithm under different channel assumptions.