基于交织多址的自适应传输  

Adaptive transmission based on IDMA

作　　者：金镜哲[1] 周世东[1] 

机构地区：[1]清华大学信息技术研究院,无线与移动通信技术研究中心,北京100084

出　　处：《清华大学学报（自然科学版）》2009年第11期1886-1890,共5页Journal of Tsinghua University(Science and Technology)

基　　金：国家“八六三”高技术项目(2007AA01Z2B6)

摘　　要：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。Interleave-division multiple-access （IDMA） implements multiuser detection by using different interleavers. IDMA has the advantages of low complexity, less computations and strong diverse capability. When used for multiplexing, it is a coding and modulation scheme. Here the diversity characteristics of the IDMA code modulation are used to provide joint adaptive transmission in multi-channel systems with both simple channel measurement method and an adaptive transmission method. Simulations show that the IDMA joint adaptive system is able to adjust well to channel estimation errors, so it adapts to transmission scenarios where the channel characteristics are unknown to the transmitter so the channel characteristics do not need to be fed back.

关 键 词：交织多址(IDMA) 自适应传输 多用户检测 信道度量 

分 类 号：TN923.53[电子电信—通信与信息系统]