Relay assisted and Cooperative CDD MC-CDMA network with frequency-correlated subcarriers

Distributed Cooperative Cyclic Delay Diversity (DCCDD) multi-hop relay network is shown to yield superior performance over traditional link network. The benefits provided by increased frequency selectivity caused by the cyclic delays are evaluated through the explicit closed-form BER expressions and maximum achievable throughput [bits/s/Hz]. Towards that end resource allocation strategies in terms of fractional frame duration and transmission power are assigned. By using the moment generating function (MGF) of the correlated Nakagami-m random variable and considering a realistic case of frequency-correlated multicarrier code division multiple-access (MC-CDMA) system, allocation strategies are derived and analyzed in order to maximize the end-to-end throughput. Monte-Carlo simulations are used to numerically verify the analytical framework with maximum ratio combining (MRC) detection technique.