Abstract
This paper proposes two novel data detectors for an uplink concatenated system which includes multiuser orthogonal frequency division multiplexing (OFDM) and four-node cooperative transmission. The structure of the received signal is exploited to design the first detector using maximum likelihood (ML) principle. The second proposed detector utilizes the principle of sliding window to enhance the processing time of the first one. The results from Monte Carlo simulations show us that both detectors are effective; however, the bit error rate performance the first detector sightly outperforms that of the second one.