软硬件协同设计实现LTE关键算法的方法  

Implementing LTE key algorithms using SW/HW co-design method

作　　者：沈苑宜 吴紫盛 李笑天[1] 何虎[1] 

机构地区：[1]清华大学微电子所,北京100084

出　　处：《计算机工程与设计》2015年第1期268-272,共5页Computer Engineering and Design

基　　金："核高基"重大专项基金项目(2012ZX01034001-002)

摘　　要：为在超标量(superscalar)和超长指令字(VLIW)双模式混合架构的数字信号处理器上高效运行LTE通信系统,分析LTE的物理层模型,找到系统中的性能瓶颈,针对性能瓶颈提出软硬件协同设计的方法,对LTE关键算法进行优化。选择OFDM发射机和信道估计模块进行重点研究,从算法层面进行分析和优化,从处理器层面进行优化,其中包括指令集的改进和处理器结构的调整。实验结果表明,该方法有效可行,该处理器有良好的性能,LTE系统能在其上高效运行。To efficiently operate the LTE system on a superscalar-VLIW hybrid microprocessor architecture digital signal proces- sor, the LTE downlink physical model was analyzed, the performance bottlenecks were found, and for performance bottlenecks, a software and hardware co-design method was used to optimize LTE key algorithms. The OFDM transmitter and the channel estimator were studied. Firstly related algorithms were analyzed and optimized, then as to the processor, the instruction set and the architecture of processor were improved. The SW/HW method was demonstrated by the results. The LTE system can efficiently operate on the processor and the processor＇s good performance is revealed.

关 键 词：长期演进 数字信号处理器 混合架构 软硬件协同设计 正交频分复用技术 

分 类 号：TP368.1[自动化与计算机技术—计算机系统结构]