无线多址信道中的协作模型研究

在无线多址信道环境下,为了充分利用协作分集技术提高系统的传输速率和通信质量,引入了多址接入中继信道（MARC）模型。通过加入一个专门的中继节点,MARC模型中的发送节点类似操作在普通的多址信道下,从而使得现有的系统可平滑过渡到协作系统,实用性强。把MARC模型应用在直序扩频CDMA系统中,在Rayleigh信道下对其误码率进行仿真,结果表明,采用MARC模型的协作网络能获得显著的性能增益。

Cooperative Model in Wireless Multiple Access Channel

In the wireless multiple access environment,multiple access relay channel（MARC） model is introduced in order to take full advantage of cooperative diversity technology and improve transmission rate and communication quality.By adding a special relay,MARC transmission nodes operate as if in a normal multiple access channel,thus making a smooth transition from existing systems to new cooperative systems.The MARC model in direct sequence spread spectrum CDMA system is analyzed,and the BER performance of the MARC model under Rayleigh channel simulated.The simulation result shows that,cooperative network with MARC model could achieve a significant performance gain.