基于FPGA的无线图像传输系统硬件设计与实现

Hardware Design and Implementation of Wireless Image Transmission System Based on FPGA

针对图像传输过程中的多路径、非通视和高速移动等特点,提出了一种FPGA+W5300架构的COFDM无线图像传输系统,实现图像的无线发射和接收。该架构中采用Xilinx公司Spartan-6系列的XC6SLX150 FPGA作为主控芯片,用于实现COFDM数字调制、射频芯片的配置,同时为A/D转换器和D/A转换器提供工作时钟。采用W5300硬件TCP/IP协议栈通过网络进行数字信号的传输,提高数据的传输速率,外加ADL5385、LT5506等上下变频芯片及其相关外设电路,最终实现一个收发一体、发射频率可设、高灵敏度的无线图像传输系统硬件平台。测试结果表明,该硬件平台能够实现图像的无线传输,具有良好的抗多径和高动态性能。

Due to the characteristics such as multipath,non visibility and high-speed motions in image transmission,a novel structure for COFDM wireless image transmission system based on FPGA＋W5300 is proposed,to achieve the wireless transmitting and receiving of image.The XC6SLX150 FPGA of Xilinx Spartan-6 family is used as the main control chip in the architecture,to implement COFDM digital modulation and RF chip configuration,as while as providing a working clock for the A/D converter and D/A converter.W5300 hardware TCP/IP protocol stack is used for digital signal transmission through the network to improve the data transmission rate.Other components includes up and down conversion chip such as ADL5385 and LT5506,and a peripheral circuit.The system realizes a wireless image transmission system hardware platform with the function of transceiver,configurable transmitting frequency and high sensitivity.Test results show that the hardware platform can realize wireless transmission of the image,and has superior performance of anti-multipath and high dynamic.