Development of OFDM cooperative communication for wireless multi-hop networks

我们提出的正交频分复用（OFDM）协作通信方案通过利用OFDM的特性来实现高性能，即接收器可以联合解调相同OFDM信号的多个副本，只要它们在保护间隔（GI）周期内接收。在本研究中，我们开发了OFDM协作通信方案，以支持一种新的无线网络多跳协作通信。结果表明，接收端可以同时接收来自不同发射机的部分相同的OFDM信号，通过路由分集提高了分组分发率。数值结果表明，与传统的CSMA/CA （Carrier Sense Multiple Access/Collision Avoidance）方案相比，该方案可以提高分组传送率和传送延迟。

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.