WiMAX信道估计插值研究与DSP实现  

WiMAX Channel Estimation Interpolation and DSP Implementation

作　　者：魏国庆 逯玉宏 杨凡 WEI Guo-qing;LU Yu-hong;YANG Fan(Chongqing Jinmei Communication Ltd.,Chongqing 400030,China)

机构地区：[1]重庆金美通信有限责任公司,重庆400030

出　　处：《通信技术》2018年第10期2511-2515,共5页Communications Technology

摘　　要：OFDM系统正常工作的关键技术之一是信道估计,以消除信道对OFDM系统性能的影响。根据Freescale公司MSC8156 DSP芯片的处理性能,进行基于MSC8156 DSP的信道估计插值方法的设计与实现。为了方便对比,使用两种语言编程实现——C语言和汇编语言同时进行不同的方式优化。通过两种语言方式的实现过程,理解MSC8156 DSP芯片的工作运算结构和能力。结果表明,汇编代码实现比C语言实现效率提高30%左右,指令周期消耗少,MSC8156DSP芯片适用于插值算法的设计实现。Channel estimation, as one of the key techniques for the normal operation of an OFDM system,could eliminate the effect of channel on the performance of OFDM system. According to the processing performance of Freescale＇s MSC8156 DSP chip, the design and implementation of channel estimation interpolation method based on MSC8156 DSP is done. In order to facilitate the comparison, two language programming implementations, namely C language and assembly language, are used, and different ways optimized. Through the implementation of the two language methods, the working structure and capabilities of the MSC8156 DSP chip are explained. The experiment results indicate that the assembly code implementation is about 30% more efficient than the C language implementation, and that the instnlction cycle consumes less, indicating that the MSC8156 DSP chip is suitable for implementation with interpolation algorithm.

关 键 词：OFDM系统 信道估计 插值 DSP实现 线性汇编代码 

分 类 号：TN929.5[电子电信—通信与信息系统]