基于TTIB技术的无线数传Modem设计与实现

摘要

Transparent tone-in-band(TTIB) and feedforward signal regeneration(FFSR) is a technology to combat the effects of multipath propagation delay and doppler effect in wireless channels. In this paper,the theory of TTIB and FFSR is described,and a design of the data modem is provided by using the digital signal processing technology to implement TTIB and FFSR.TTIB and FFSR can be used in data transmitting of HF single sideband transmitter-receiver.%TTIB（透明带内导音）及FFSR（前馈信号再生）技术是一种可抗无线信道中多径时延及多谱勒频移引起的信号衰落的技术。在阐述TTIB/FFSR原理的基础上，提出一种用数字信号处理技术来实现TTIB/FFSR技术、应用于现有短波SSB电台使其具有数传功能的无线Modem完整设计方案及其硬件测试模型，并就实验结果对其改进进行探讨。