一种支持多模式调制解调的通用硬件平台设计
发布时间：2018-10-21 20:35
【摘要】：物联网继互联网之后,成为信息产业的又一次革命浪潮,其在智能家居、物流、医疗等领域的示范性应用,推动着物联网技术的快速发展。其中,适用于物联网的无线通信技术越来越受到重视。不同的物联网应用场景需要不同的无线通信方式。为了实现万物互联,适应不同通信技术标准、支持多制式的调制解调平台成为研究热点。本文利用资源共享,基于FPGA将物联网中广泛采用的2FSK,BPSK和QPSK的调制解调系统集成到同一通用硬件平台,满足物联网需求。首先,学习了三种模式的基本调制解调原理。针对解调部分,提出了一个统一的同步机制。传统的Costas loop无法覆盖所有的相位误差,机制改进了传统Costas loop的鉴相结构,使其鉴相范围能够覆盖从-90°至90°。同时,同步机制结合基于训练序列的相位旋转法消除了系统的相位模糊。这种方法适用于各种模式的相干解调,通用性较高。然后,在调制解调系统的硬件实现过程中,分析了各模块的最佳设计方法。通过硬件共享将各模式的调制解调结构统一,实现了一个可以即时转换不同模式的全硬件平台。系统开发平台为Altera FPGA,型号为Stratix Ⅲ EP3SE50F484C2。实验时,基于FPGA分别实现了单一BPSK,2FSK和QPSK的硬件平台,对比它们和通用平台的硬件资源消耗情况,平均优化达到56.09%。设计实现的操作频率可达202.36MHz,基带数据传输速率在4.8kbps至20Mbps内可调,满足物联网无线通信的需求。
[Abstract]:After the Internet of things, Internet of things has become another revolutionary tide of information industry. Its exemplary application in the fields of smart home, logistics, medical treatment and so on, promotes the rapid development of Internet of things technology. Among them, the wireless communication technology suitable for the Internet of things has been paid more and more attention. Different internet of things applications require different wireless communication methods. In order to interconnect everything, adapt to different communication technology standards and support multi-standard modulation and demodulation platform has become a research hotspot. In this paper, the widely used modulation and demodulation systems of 2FSKBPSK and QPSK in the Internet of things are integrated into the same common hardware platform based on FPGA to meet the needs of the Internet of things. First, the basic modulation and demodulation principles of three modes are studied. A unified synchronization mechanism is proposed for demodulation. The traditional Costas loop can not cover all the phase errors. The mechanism improves the phase detection structure of the traditional Costas loop so that it can cover the range from -90 掳to 90 掳. At the same time, the synchronization mechanism combined with the phase rotation method based on training sequence eliminates the phase ambiguity of the system. This method is suitable for coherent demodulation of various modes and has high generality. Then, in the hardware implementation of modulation and demodulation system, the optimal design method of each module is analyzed. Through hardware sharing, the modulation and demodulation structure of each mode is unified, and a hardware platform which can convert different modes in real time is realized. The system development platform is Altera FPGA, model Stratix 鈪，
本文编号：2286304
[Abstract]:After the Internet of things, Internet of things has become another revolutionary tide of information industry. Its exemplary application in the fields of smart home, logistics, medical treatment and so on, promotes the rapid development of Internet of things technology. Among them, the wireless communication technology suitable for the Internet of things has been paid more and more attention. Different internet of things applications require different wireless communication methods. In order to interconnect everything, adapt to different communication technology standards and support multi-standard modulation and demodulation platform has become a research hotspot. In this paper, the widely used modulation and demodulation systems of 2FSKBPSK and QPSK in the Internet of things are integrated into the same common hardware platform based on FPGA to meet the needs of the Internet of things. First, the basic modulation and demodulation principles of three modes are studied. A unified synchronization mechanism is proposed for demodulation. The traditional Costas loop can not cover all the phase errors. The mechanism improves the phase detection structure of the traditional Costas loop so that it can cover the range from -90 掳to 90 掳. At the same time, the synchronization mechanism combined with the phase rotation method based on training sequence eliminates the phase ambiguity of the system. This method is suitable for coherent demodulation of various modes and has high generality. Then, in the hardware implementation of modulation and demodulation system, the optimal design method of each module is analyzed. Through hardware sharing, the modulation and demodulation structure of each mode is unified, and a hardware platform which can convert different modes in real time is realized. The system development platform is Altera FPGA, model Stratix 鈪，
本文编号：2286304
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