【作者】 寇肖刚；

【导师】 白宝明；

【作者基本信息】 西安电子科技大学 ， 通信与信息系统， 2010， 硕士

【摘要】 第三代移动通信系统为了满足移动用户对高速、宽带数据传输业务不断增长和更高服务质量的需求,采用了许多新的无线链路传输技术,包括多天线发射和接收(MIMO)技术、正交频分复用(OFDM)技术、信道纠错编码技术和自适应编码调制(ACM)技术等。自适应编码调制技术是一项在衰落信道中逼近香农容量限,获得高的系统吞吐量的必需技术。该技术的基本原理是发送端根据信道状态信息(CSI)实时地改变传输码率和调制方式,在保证可靠性的同时提高有效性,从而最大化系统的频谱利用率。本文结合863项目“宽带无线传输中的高速高效自适应编码调制研究”,完成了基于DSP的AWGN信道设计,并对通过该信道的多元LDPC码的量化性能进行了仿真与分析,得出了量化准则。这对于进一步研究基于DSP的自适应编码调制技术有着深刻的指导意义。更多还原

【Abstract】 In the third generation (3G) mobile communication, to suffice more and more high-speed data services and better Quality of Service (Qos), many new wireless transmission techniques have been used, such as Multiple Input and Multiple Output (MIMO), Orthogonal Frequency Division Multiplexing (OFDM), channel coding and Adaptive Coded Modulation (ACM) etc.ACM is a powerful technique to approach Shannon capacity and achieve high throughput in fading channels. The basic principle of ACM is that the transmitter chooses proper code rate and modulation mode real-timely according to channel side information (CSI), so we can improve system efficiency with the guarantee of reliability and maximize spectrum utilization.Under the guideline of State 863 Project“Research on High Rate and Efficient ACM in Wideband Wireless Transmission”, this dissertation constructs an AWGN channel using TMS320C6416 DSP, does some research on the quantization performance of non-binary LDPC code which passes the DSP channel and determines a quantization rule. All these fruits have great help to further study on Adaptive Coded Modulation based on DSP.更多还原