应用DS扩频信号的卫星重叠通信研究

Overlay communication based on satellite with DSSS signal

提出一种利用DS扩频技术实现卫星重叠通信的方案。首先,深入分析了DS扩频信号与其他窄带或宽带通信业务进行重叠通信的相互影响,然后对重叠通信方案的关键算法进行分析和推导。通过该方案,可以得到应用DS扩频技术进行卫星重叠通信时DS扩频信号中心频率位置选择、带宽设置和给定条件下的可实现的最大重叠容量。并对该方案进行了计算机仿真,仿真结果验证了方案的可行性和性能指标。利用DS扩频技术实现卫星重叠通信,是有效利用现有卫星通信系统资源提高系统容量和开辟新通信途径的重要手段。

It was proposed that the project of satellite overlay communication with direct sequence spectrum spreading (DSSS). Firstly the mutual effects of DSSS signal and other narrow band or wide band signal were studied. Then the main algorithms of overlay communication were analyzed and derived. Applying the project the center frequency position, bandwidth and maximum capacity under given conditions were got. Also the computer simulations were done. The simulation results validate the feasibility of the project and performance index. Satellite overlay communication technology by DSSS is an important means for utilizing satellite communication source to increase system capacity and create new communication approach.