数据收集系统的电文碰撞和计算机模拟

数据收集系统是利用人造卫星中继地球环境资料的一种无线电遥测系统。近地卫星(如美国的陆地卫星、泰罗斯-N气象卫星)所属的数据收集系统一般都采取随机取数的方法。在这类系统设计中,电文碰撞规律是涉及到系统容量的重要问题。本文在古典概率的基础上,经适当修改,得到符合计算机模拟结果的理论公式。并提供针对不同系统方案的电文碰撞概率的计算方法。 

MESSAGE COLLISION OF DATA COLLECTION SYSTEM AND IT'S COMPUTER SIMULATION

Data collection system (DCS) is a telemetry instrument using satellite as a relay station for transmissing the earth environment data,DCSof near-earth satellites,such as that of landsat and Tiros-N,are alb designed by means of the random access principle.For the design of the systems,the law of message collision which is concerned with the capacity of the systems is an important problem.In this paper,the theoretical representations which agree with the simulation results are given.Computation of probability of the message collision for various scheme are presented.