摘要： 基于分组Turbo码的经典译码算法，分析译码参数与译码复杂度的关系及其对译码性能的影响，以一种(15, 11)×(13, 9)分组Turbo码为例，在权衡复杂度与性能的前提下，给出其在C55系列数字信号处理器(DSP)上的软件实现方案，并从定点化、编译选项、高级语言与汇编语言多个层面对译码算法进行优化，使译码运算量较未优化时降低89%。
关键词:
信道编码,
分组Turbo码,
译码性能,
数字信号处理器,
定点化
Abstract: Based on the classic decoding algorithm of Block Turbo Code(BTC), the relationship between decoding parameters and decoding complexity, and the impact of different parameters on performance, are analyzed. Taking a kind of (15, 11)×(13, 9) BTC for example, the software implementation scheme on C55 series Digital Signal Processor(DSP) is presented considering the compromise between performance and complexity. The optimization is done through different levels such as fix-point processing, complier options, high-level language and assembly language. Computational complexity has 89% reduction after optimization.
Key words:
channel coding,
Block Turbo Code(BTC),
decoding performance Digital Signal Processor(DSP),
fixed-point
中图分类号:
张守柱, 李青, 崔慧娟, 唐昆. 分组Turbo码的译码性能分析及DSP优化[J]. 计算机工程, 2012, 38(2): 116-118.
ZHANG Shou-Zhu, LI Jing, CUI Hui-Juan, TANG Hun. Decoding Performance Analysis and DSP Optimization for Block Turbo Code[J]. Computer Engineering, 2012, 38(2): 116-118.