基于DSP的准正交酉空时调制编解码器的实现

DSP Implementation of Codec Based on Quasi-orthogonal Unitary Space-Time Modulation

在高速数据通信系统中,为降低系统的复杂度,通常使用差分编解码。本文在介绍准正交酉空时调制编解码原理的基础上,给出了编解码器的硬件实现方案和流程图,并用C与汇编语言在TMS3205416 DSP上进行了编解码器的实现。通过RTDX实时调试环境测出的结果表明,硬件条件下得出的误比特率与MATLAB仿真的结果相近,验证了DSP环境下编解码器的设计符合实际应用。且文中提出的简化的解码算法减少了DSP的解码执行时间。

In high-speed data communication system, we often use differential encoding and decoding to reduce system complexity. Based on the introduction of the coding principles of unitary space-time modulation, we give the hardware codec programs and flow chart, then implement the codec by C and assembly language on the basis of TMS3205416 DSP. The RTDX debugging result shows that bit error rate computed by DSP is similar to that of the MATLAB＇s, verifying that codec in the DSP environment meets the requirements of practical application. And the proposed simplified algorithm can reduce the time of DSP decoding.