基于DSP的LTE下行信号接收技术研究和实现
发布时间：2019-02-23 23:55
【摘要】：随着社会经济和科技的快速发展,宽带无线电通信技术(WIFI、WiMAX、CDMA、LTE等)和移动互联网融入日常生活当中,与此同时,却带来了人为干扰严重和电磁环境复杂化的问题。为了解除这种矛盾,需要进行无线电管理。LTE (Long Term Evolution,长期演进)作为现代社会移动通信的标准,具有高峰值速率、高频谱效率、网络架构扁平化、高移动性和低时延等多种优势,能够符合现在电信技术业务移动化、IP化和宽带化的需求,得到了广泛的应用。本论文从实际应用背景出发,对LTE下行信号进行监测。论文依据LTE物理层协议(3GPPTS36.201-214),在接收端完成同步的前提下,针对FFT、信道估计、解预编码、解层映射、解调、解扰、解速率匹配、信道译码和CRC校验等信号处理环节设计了LTE下行信号的接收处理方案。基于多核片上系统架构DSP芯片TMS320C6670,设计了使用VCP2和TCP3d协加速器完成咬尾卷积码译码和turbo码译码的技术方案,降低了对DSP的CPU核心的处理负荷,并提升了实时性,降低了功耗。论文在TMS320C6670评估板上以及CCS软件开发环境下,针对以上设计进行了代码实现和验证,对LTE下行信号接收处理的性能和开销进行了评估,评估结果表明系统的设计和实现可满足应用需求。本论文基于DSP对LTE的物理层信号进行接收处理,为后续开发和应用奠定了基础。
[Abstract]:With the rapid development of social economy and science and technology, broadband radio communication (WIFI,WiMAX,CDMA,LTE) and mobile Internet are integrated into the daily life, but at the same time, it brings serious man-made interference and complex electromagnetic environment. In order to solve this contradiction, radio management. LTE (Long Term Evolution, should be developed for a long time. As the standard of modern mobile communication, it has high peak rate, high spectral efficiency and flat network architecture. Because of its advantages of high mobility and low delay, it can meet the needs of mobile, IP and broadband telecommunication technology, and has been widely used. Based on the practical application background, this paper monitors the downlink signal of LTE. According to LTE physical layer Protocol (3GPPTS36.201-214), this paper aims at FFT, channel estimation, de-coding, de-layer mapping, demodulation, descrambling and descrambling rate matching under the premise of synchronization at the receiving end. Signal processing such as channel decoding and CRC check are designed to receive and process LTE downlink signals. Based on the multi-core system architecture DSP chip TMS320C6670, this paper designs a technical scheme of VCP2 and TCP3d coaccelerator to decode the bitting convolutional code and turbo code, which reduces the processing load of the CPU core of DSP, improves the real-time performance and reduces the power consumption. Based on the TMS320C6670 evaluation board and the CCS software development environment, this paper implements and verifies the above design, and evaluates the performance and overhead of the LTE downlink signal receiving and processing. The evaluation results show that the design and implementation of the system can meet the application requirements. In this paper, the physical layer signal of LTE is received and processed based on DSP, which lays a foundation for further development and application.
【学位授予单位】：东南大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TN929.5
[Abstract]:With the rapid development of social economy and science and technology, broadband radio communication (WIFI,WiMAX,CDMA,LTE) and mobile Internet are integrated into the daily life, but at the same time, it brings serious man-made interference and complex electromagnetic environment. In order to solve this contradiction, radio management. LTE (Long Term Evolution, should be developed for a long time. As the standard of modern mobile communication, it has high peak rate, high spectral efficiency and flat network architecture. Because of its advantages of high mobility and low delay, it can meet the needs of mobile, IP and broadband telecommunication technology, and has been widely used. Based on the practical application background, this paper monitors the downlink signal of LTE. According to LTE physical layer Protocol (3GPPTS36.201-214), this paper aims at FFT, channel estimation, de-coding, de-layer mapping, demodulation, descrambling and descrambling rate matching under the premise of synchronization at the receiving end. Signal processing such as channel decoding and CRC check are designed to receive and process LTE downlink signals. Based on the multi-core system architecture DSP chip TMS320C6670, this paper designs a technical scheme of VCP2 and TCP3d coaccelerator to decode the bitting convolutional code and turbo code, which reduces the processing load of the CPU core of DSP, improves the real-time performance and reduces the power consumption. Based on the TMS320C6670 evaluation board and the CCS software development environment, this paper implements and verifies the above design, and evaluates the performance and overhead of the LTE downlink signal receiving and processing. The evaluation results show that the design and implementation of the system can meet the application requirements. In this paper, the physical layer signal of LTE is received and processed based on DSP, which lays a foundation for further development and application.
【学位授予单位】：东南大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TN929.5
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