LTE系统Turbo编译码器的设计与FPGA实现

发布时间：2018-06-05 18:38

本文选题：Turbo码 + LTE　；参考：《西安电子科技大学》2014年硕士论文

【摘要】：Turbo码以其逼近香农极限的优异性能受到了广泛的关注。目前,已经被成功应用于第三代移动通信、卫星通信以及数字广播电视等现代通信系统中。而正在部署的LTE、LTE-A系统也已经将Turbo码作为其信道编码方案之一,以满足高速业务发展的需求。论文重点研究了LTE系统中的低复杂度Turbo高速译码算法及其的硬件实现。论文首先介绍了Turbo基本编译码原理,分析比较了几种常用的译码算法:MAP算法、LOG_MAP算法、MAX_LOG_MAP算法及其改进算法。其次,为了有效降低译码时延,提高系统吞吐率,在算法方面,研究了HDA停止迭代判决准则和基于三个比特同时处理的Radix-8算法;在译码结构方面,研究了基于流水线的串行译码结构,重点分析了基于并行分块处理的并行译码结构以及针对子块的流水线滑窗译码算法,给出了并行无冲突交织器的设计准则及实例。论文最后给出了LTE系统中的Turbo码FPGA设计方案。并基于Kintex-7系列芯片和Xilinx公司的ISE软件开发平台,对LTE系统的Turbo编译码器进行了设计实现,经过调试优化后满足系统要求。
[Abstract]:Turbo codes have attracted much attention for their excellent performance in approaching Shannon limit. At present, it has been successfully used in modern communication systems such as the third generation mobile communication, satellite communication and digital broadcast television. The LTE LTE-A system which is being deployed has also taken the Turbo code as one of its channel coding schemes to meet the needs of high-speed service development. This paper focuses on the low complexity Turbo high speed decoding algorithm in LTE system and its hardware implementation. Firstly, this paper introduces the basic encoding and decoding principle of Turbo, analyzes and compares several commonly used decoding algorithms: map algorithm and LOGSTAP algorithm and their improved algorithms. Secondly, in order to effectively reduce the decoding delay and improve the throughput of the system, the HDA stopping iterative decision criterion and the Radix-8 algorithm based on three bits processing are studied in the aspect of decoding structure. The serial decoding structure based on pipeline is studied. The parallel decoding structure based on parallel block processing and the pipelined sliding window decoding algorithm for sub-blocks are analyzed. The design criteria and examples of parallel conflict free Interleaver are given. Finally, the design scheme of Turbo code FPGA in LTE system is given. Based on Kintex-7 chips and ISE software development platform of Xilinx Company, the Turbo encoder and decoder of LTE system are designed and implemented. After debugging and optimization, the system requirements are satisfied.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN911.22;TN791

【引证文献】