【摘要】 针对应急通信场景中图像、视频等宽带数据的稳定收发需求,基于软件无线电架构,设计了2收2发天线的数字高清图传电路。该电路采用FPGA对基带数据进行64QAM调制,并通过AD9361射频收发器变频至5.8 GHz进行收发。设计中使用ADS软件对AD9361的射频接收前端级联链路的阻抗匹配网络进行了仿真,在VIVADO软件中进行64QAM调制电路的设计与仿真。经测试,该电路能够进行图像数据的采集、基带调制和收发,能够满足应急通信场景下高清图像的传输需求,具有体积小、通用性强的特点。更多还原

【Abstract】 Aiming at the stable sending and receiving needs of image, video and other broadband data in emergency communication scene, a digital high-definition image transmission circuit with two receiving and two transmitting is designed based on software radio architecture. FPGA is used to modulate the baseband data with 64 QAM,and AD9361 transceiver is used to convert the baseband data to 5.8 GHz. In the design, ADS software is used to simulate and design the impedance matching network of the RF(Radio Frequency)receiving front-end cascade link of AD9361,and the 64 QAM digital baseband modulation circuit is designed in VIVADO software. The test results show that the circuit can collect and receive image data, meet the needs of high-definition image transmission in emergency communication scenarios, and has the characteristics of small size and strong versatility.更多还原