一种远距离航空型变换域通信系统设计与仿真

Design and Simulation of a Long-Distance Aviation Transform Domain Communication System

传统的变换域通信系统(TDCS)在获得强抗干扰能力的同时,其对通信双方电磁环境必须保持一致的约束条件也成为制约其广泛应用的技术瓶颈。为了解决复杂电磁环境下指挥电台和机载电台之间的通信问题,在传统TDCS的基础上提出了一种远距离航空型变换域通信系统。给出了其总体方案,对TDCS空地收发信机模型中的各功能模块进行了较详细的分析,并通过采用M元扩频通信体制实现了基函数的可靠传递,从而将通信双方电磁环境不一致转化为等效一致。利用MATLAB软件仿真验证表明,TDCS抗多音干扰的性能优于直接序列扩频。

With the excellent ability of anti-jamming, the traditional Transform Domain Communication System（ TDCS ）is limited in wide application due to the same electromagnetic environment between the transmitter and the receiver. Based on the traditional TDCS, a Long-Distance Aviation Transform Domain Communication System（ LDA-TDCS ）is presented to realize the aviation communication under complex electromagnetic environment. The scheme and function model of LDA-TDCS are introduced, and its every function module is analyzed in detail. Since the basis functions are transmitted reliably with M-ary spread spectrum technique, the LDA-TDCS is converted to the equivalent traditional TDCS.The simulation results by MATLAB show that the anti-jamming performance of LDA-TDCS is better than that of DSSS （ Direct Spread Spectrum System ） under multiple tones jamming.