多核DSP的研究实现及在LTE中的应用

发布时间：2018-01-20 02:12

本文关键词： LTE 片间通信核间通信并行FFT　出处：《电子科技大学》2012年硕士论文　论文类型：学位论文

【摘要】：随着通信技术的发展,LTE技术日益得到科研人员的高度关注,同时,随着LTE标准的逐年增加,对系统的功耗和升级也提出了挑战。为了推进LTE系统的全软件化进程,本文讨论了LTE中的OFDM系统,研究了并行FFT算法,并在搭建的多核DSP微架构上实现了新算法。本文主要完成了以下两部分工作：一部分是DSP微架构平台关键技术研究,包括DSP的核间通信策略和片间通信策略。另一部分是OFDM系统中FFT算法的并行研究,以及在DSP微架构平台上的实现。论文首先研究了DSP的片间通信实现。SRIO主要是针对高性能嵌入式系统中芯片间和板间互连而设计的新的接口标准,传输速率高达Gbit/s,可以满足LTE的高速率要求。接下来,论文研究了DSP的核间通信实现。研究并探讨了三种核间通信方法：IPCGR寄存器方式、MSGQ模块方式和EDMA3控制器方式。对其性能进行测试和比较,发现对本课题来说,进行大数据量传输EDMA3控制器是最好的核间通信方式,传输速率高,使用起来也比较灵活,可以满足LTE系统中的需求。平台搭建完成之后,本文阐述了OFDM中FFT算法的实现,在此基础上讨论并研究了一种并行FFT算法。通过MATLAB方真验证了该算法的正确性,将该算法在两个DSP、两核和四核平台实现,并测试了不同平台下FFT的运行效率。通过对占用CPU时钟周期的分析,在多核DSP微架构平台上并行计算FFT,可以有效的提高FFT的运算效率。尤其是大点数FFT,效果更加突出。
[Abstract]:With the development of communication technology, LTE technology has been paid more and more attention by researchers. At the same time, with the increase of LTE standard year by year. In order to promote the whole software process of LTE system, this paper discusses the OFDM system in LTE, and studies the parallel FFT algorithm. A new algorithm is implemented on the multi-core DSP microarchitecture. This paper mainly completes the following two parts of the work: the first part is the key technology research of DSP microarchitecture platform. The other part is the parallel research of FFT algorithm in OFDM system and its implementation on DSP platform. In this paper, the inter-chip communication implementation of DSP. SRIO is a new interface standard designed for interconnecting between chips and boards in high performance embedded system. The transmission rate is as high as Gbit/s. It can meet the high speed requirement of LTE. Then, this paper studies the implementation of inter-core communication of DSP, and discusses three methods of inter-core communication: IPCGR register. MSGQ module mode and EDMA3 controller mode. To test and compare its performance, it is found that the EDMA3 controller is the best inter-core communication mode for this project. High transmission rate, flexible use, can meet the needs of LTE system. After the completion of the platform, this paper describes the implementation of FFT algorithm in OFDM. On this basis, a parallel FFT algorithm is discussed and studied. The correctness of the algorithm is verified by MATLAB. The algorithm is implemented on two DSPs, two cores and four cores. The running efficiency of FFT on different platforms is tested. By analyzing the clock cycle of CPU, the parallel computing of FFT on multi-core DSP microarchitecture is carried out. Can effectively improve the efficiency of FFT, especially large number of FFTs, the effect is more prominent.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TP368.1;TN929.5

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