基于SC-FDE的一种无人机新型图传系统设计  

Design on new type of UAV image transmission system based on SC-FDE

作　　者：边慧颖 张德海 刘鹏 Bian Huiying;Zhang Deihai;Liu Peng(University of Chinese Academy of Science,Beijing 100049,China;Key Laboratory of Microwave Remote Sensing,Chinese Academy of Science,Beijing 100190,China)

机构地区：[1]中国科学院大学,北京100049 [2]中国科学院国家空间科学中心微波遥感技术重点实验室,北京100190

出　　处：《无线互联科技》2021年第18期63-65,91,共4页Wireless Internet Technology

摘　　要：针对无人机高速率图传系统单载波频域均衡技术中传输帧在突发传输模式下无法兼顾带宽利用率和系统误码性能的不足,提出了一种改进的数据传输帧,建立了无人机新型图传系统。该系统采用的数据传输帧包含同步头和数据部分,其中数据部分采用总帧中包含子帧,子帧中包含子帧头和小帧。其主要优势在于:大大提高了有效数据的传输效率;突发模式下可实现一次同步连续传输;采用多次估计的平均值作为信道估计,提高信道估计的准确度;每个子帧中一次信道估计用于多次均衡,减少不必要的信道估计;将有效数据分块传输,可控制FFT的点数。Matlab仿真和FPGA硬件实现结果均表明,该系统在保证系统误码性能的同时可提高带宽利用率。Aiming at the insufficient bandwidth utilization and system error performance of the transmission frame in the single-carrier frequency domain equalization technology of the UAV high-rate image transmission system in the burst transmission mode,an improved data transmission frame is proposed,and the data transmission frame is established.A new type of man-machine image transmission system.The data transmission frame used in the system includes a synchronization header and a data part,where in the data part adopts a sub-frame in the total frame,a sub-frame header and a small frame in the sub-frame.Its main advantages are:greatly improving the transmission efficiency of effective data.One simultaneous continuous transmission can be achieved in burst mode.The average value of multiple estimates is used as the channel estimation to improve the accuracy of the channel estimation.The channel estimation is performed once in each subframe.It is used for multiple equalization to reduce unnecessary channel estimation.The effective data is transmitted in blocks,and the number of FFT points can be controlled.Both the Matlab simulation and FPGA hardware implementation results show that the system can improve the bandwidth utilization rate while ensuring the system error performance.

关 键 词：单载波频域均衡 突发模式 数据传输帧 

分 类 号：V279[航空宇航科学与技术—飞行器设计] TN919.3[电子电信—通信与信息系统]