一种适于卫星定位与通信系统的扩频ALOHA信道模型

随着人们对通信需求的不断增长，带来了如何有效地利用频率问题，同时也产生了越来越多的多址技术。本文将扩频技术与随机ＡＬＯＨＡ通信方式相结合，提出了一种适于卫星定位与通信系统的扩频ＡＬＯＨＡ信道模型。并对此信道的信道利用率进行了计算，得到了好的结果。全文还对定位与通信构成一体化系统的可实现性做了详细描述。最后，简单介绍了双星定位及通信系统的定位原理。

A Spread Spectrum ALOHA Channel Model for Satellite Positioning and Communication Systems

With the increased need for communications come a need for the efficient use of tile frequency spectrum and the more multiple access technique. This paper presents a spread spectrum ALOHA channel model for satellite positioning and communication systems based on combining the spread spectrum technique with the random ALOHA communication pattern. The calculations of channel effectiveness are given. The feasibility of integrating the positioning system and communication stsyem is described in detail. And finally, the paper discusses simply the positioning principle of the two-satellite positioning and communication systems.