一种信道预测下的自适应QAM调制方法

Adaptive QAM modulation method based on channels prediction algorithm

提出一种自适应矩形多幅度调制方法,能够更有效应用于无线移动通信中的多径衰落信道。其中发送端的信道状态信息(CSI)通过基于预处理的ESPRIT信道预测算法获得。理论分析和仿真实验表明,这种信道预测算法下的自适应QAM调制方法,在保证目标误码率的前提下,实现了比无自适应传输技术更快的比特率,提高了带宽利用率。

It gives an adaptive quadrature amplitude modulation （QAM） method which could be more efficiently used in the multi-path fading channels encountered in mobile radio. The channel state information （CSI） at the transmitter was gained though the estimation signal parameters via rotational invariance techniques （ESPRIT） algorithm based on pretreatment. The theory analyses and simulation results show that the method proposed can realize the faster bit rate （and hither bandwidth used rate） relative to non adaptive transmission technique and avoids severe code error rate penalty at the same time.