集中式基站中基带信号FFT算法研究与移植实现

发布时间：2019-07-09 11:37

【摘要】：随着智能电子设备的普及,移动互联网时代的来临,移动用户量暴涨的同时,也给无线移动通信系统带来了巨大的压力。业务数据量大,系统能耗高、维护成本贵、用户体验差等问题,使运营商陷入了尴尬两难的境地。面对诸多挑战,移动通信系统也迎来了新的5G革命,一种创新的基于云接入(C-RAN)的集中式网络架构,可重定义多模基带池,多模协议处理池,全局资源管理控制池的技术研发正日益受到重视。实时通信系统的基带处理大量使用FFT运算,FFT已成为了通信信号处理的核心组件,因此提升系统性能的关键是设计先进的FFT算法和实现方法,提高FFT运算速度。论文首先介绍了超级基站的架构和关键技术,并详细说明了核心的基带处理单元——ICT-BBUH1000的软硬件组成,重点分析了核心处理器——DSP6618的功能和结构。接着,针对FFT基4快速算法进行了分析研究,给出了FFT基4算法的实现原理和处理流程,并设计实现了基4算法,完成了与MATLAB的校验,验证了程序的正确性。最后,基于搭载DSP6618的基带板卡,对LTE系统进行了基带的设计和移植,通过对FFTC模块的测试,分析了FFTC的效率,验证了系统的可靠性和准确性。本论文的工作对构建可重定义多模基带池有重要的基础性意义。
[Abstract]:With the popularity of intelligent electronic devices and the advent of the mobile Internet era, the number of mobile users has skyrocketed, but also brought great pressure to the wireless mobile communication system. The operators are in an awkward dilemma because of the large amount of business data, the high energy consumption of the system, the high maintenance cost, the poor user experience and so on. Facing many challenges, the mobile communication system has also ushered in a new 5G revolution. An innovative centralized network architecture based on cloud access (C-RAN), which can redefine the multi-mode base band pool, the multi-mode protocol processing pool, and the technology research and development of the global resource management control pool is being paid more and more attention. FFT operation is widely used in baseband processing of real-time communication system. FFT has become the core component of communication signal processing. Therefore, the key to improve the performance of the system is to design advanced FFT algorithm and implementation method to improve the speed of FFT operation. Firstly, the architecture and key technology of super base station are introduced, and the hardware and software composition of ICT-BBUH1000, the core baseband processing unit, is described in detail, and the function and structure of DSP6618, the core processor, are analyzed in detail. Then, the fast algorithm of FFT base 4 is analyzed and studied, the realization principle and processing flow of FFT base 4 algorithm are given, and the base 4 algorithm is designed and implemented, and the verification with MATLAB is completed to verify the correctness of the program. Finally, based on the baseband card with DSP6618, the baseband design and transplantation of LTE system are carried out. through the test of FFTC module, the efficiency of FFTC is analyzed, and the reliability and accuracy of the system are verified. The work of this paper is of great significance to the construction of redefined multi-mode band pool.
【学位授予单位】：云南大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TN929.5

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