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本文论述三个问题:1.场强测试和数据处理;2.建立地形地物数据库;3 编制软件,在VS—80机上进行场强予测。在场强测试中采用磁带记录方式。它解决了纸带记录速度慢和数据处理时需人工取样的缺点。我们在数理统计时使用A/D模数变换,直接由磁带机送微处理机进行统计。为了进行场强予测,首先将电波传播特性的实测——统计特性存入计算机。同时将城市分成许多单元,各单元的地形地物特性用参数表示,按矩阵的形式存入计算机,形成地形地物数据库。在传播理论的指导下,利用电波传播的统计特性和数据库,编制软件,在VS—80机上进行场强予测,得到场强分布。上述工作对城市汽车移动通信组网和城市无线电管理计算机化提供有效的数据。
This article addresses three issues: 1. field strength testing and data processing; 2. creating terrain features database; 3. compiling software for field strength measurements on the VS-80. In the field test using tape recording method. It solves the shortcomings of tape recording speed and manual sampling when data processing. We use the A / D analog-to-digital conversion in the mathematical statistics, directly to the microprocessor by the tape drive for statistics. In order to predict the field strength, the measured-statistical characteristics of the radio wave propagation characteristics are first stored in a computer. At the same time, the city is divided into many units. The terrain features of each unit are expressed in terms of parameters and stored in the computer in the form of matrix to form a database of terrain objects. Under the guidance of communication theory, using the statistical characteristics of radio propagation and database, the software was compiled and the field strength was measured on the VS-80 to obtain the field strength distribution. The above work provides effective data for urban mobile communication network and computerization of urban radio management.