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交织多址(IDMA)作为一种多址方式,它采用了不同的交织序列实现多用户检测。它具有复杂度低、运算量小、编码分集能力强的特点。当用于复用时,可以作为一种特殊的编码调制方法。该文利用IDMA编码调制分集特性,研究了多通道传输系统中的联合自适应传输中的应用,提出一种简单的信道度量及自适应方法。仿真结果表明,IDMA联合自适应系统可以很好地适应信道估计的误差,即IDMA系统适合于发送端不知道信道局部特性的或不需反馈局部特性的自适应传输。
Interleaving multiple access (IDMA) as a multiple access mode, which uses a different interleaving sequence for multi-user detection. It has the characteristics of low complexity, small amount of computation and strong code diversity ability. When used for multiplexing, can be used as a special encoding modulation method. In this paper, IDMA coded modulation diversity is used to study the application of joint adaptive transmission in multi-channel transmission system. A simple channel measurement and adaptive method are proposed. The simulation results show that the IDMA joint adaptive system can well adapt to the channel estimation error, that is, the IDMA system is suitable for the adaptive transmission where the sender does not know the local characteristics of the channel or does not need to feed back the local characteristics.