Development of OFDM cooperative communication for wireless multi-hop networks

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Our proposed Orthogonal Frequency-Division Multiplexing (OFDM) cooperative communication scheme achieves high performance by utilizing features of OFDM whereby receivers can jointly demodulate multiple copies of the same OFDM signal, as long as they are received within the Guard Interval (GI) period. In this research, we have developed the OFDM cooperative communication scheme to support a new cooperative multi-hop communication for wireless networks.The results show that receivers can simultaneously receive some of the same OFDM signals from different transmitters, and that this improves the packet delivery ratio by means of route diversity. The numerical results show that both packet delivery ratio and delivery delay can be improved as compared to conventional Carrier Sense Multiple Access/Collision Avoidance (CSMA/CA) schemes.