窄带数字信道的抗多径衰落技术研究

Investigation of Techniques Combating Multipath Fading over Narrow Band Digital Channel

根据透明带内导音(TTIB)及前馈信号再生(FFSR)技术抗多径传播效应的工作原理,提出了一种实验TTIB结构——简化TTIB。应用数字信号处理芯片(DSP)完成了一个简化TTIB/FFSR试验系统并证明了FFSR理论的可行性,这表明导音单边带移动通信系统利用TTIB/FFSR技术改善话音和数据传输质量是可能的。

According to the principles of transparent tone-in-band(TTIB) and feedforward signal regeneration (FFSR) techniques combating multipath propagation effects,a trial TTIB configuration-simple TTIB is suggested. By means of digital signal processor,a simple TTIB experimental system is accomplished to prove the feasibility of FFSR theory and the possibility of an improvement in the transmission quality of voice and data communications in pilot tone SSB mobile radio systems incorporating TTIB/FFSR techniques.