SC-FDE宽带航空数传接收机的设计与实现

为满足航空信道条件下的远距离宽带数据传输需求,基于单载波频域均衡传输(SC-FDE)体制,采用8 PSK调制体制进行了宽带数字接收机的设计,包括传输帧同步、载波同步、定时同步、信道估计和频域均衡.同时,为保证灵活应用的需求,采用数字内插的方式进行了可变传输速率设计.基于Xilinx现场可编程门阵列(FPGA)平台对硬件实现进行优化,最终实现了传输速率能够从112.5 Mbit/s覆盖到900 Mbit/s的数传接收机.仿真分析和硬件测试结果表明,该接收解调设备能够实现很好的性能指标,同时SC-FDE架构具备有效补偿多径传播影响的能力,适合应用于高动态无线宽带航空数据传输系统中.

Design and implementation of a broadband aeronautical high data rate receiver using SC-FDE

To meet the demands of long distance broadband data transmission under aeronautical channel,a digital broadband receiver with 8 PSK modulation scheme is designed by using single carrier frequency do-main equalization ( SC-FDE) ,including transmission frame synchronization,carrier recovery,timing recov-ery,channel estimation and frequency domain equalization. Meanwhile,for flexible consideration,the varia-ble rate ability is designed by using numerical interpolation method. Based on implementation optimization for Xilinx field-programmable gate array ( FPGA) platform,the broadband receiver is accomplished,whose transmission rate covers 112. 5~900 Mbit/s. Numerical simulation analysis and hardware tests show that the receiver has a very good performance,and the SC-FDE scheme has the ability to well compensate the effects of multipath propagation and fits for applying in high dynamic aeronautical broadband wireless data transmission systems.