论文部分内容阅读
根据正交分割理论,现在流行的频率分割制(FDM)和时间分割制(TDM)都属于正交分割的范畴。满足正交条件的信号不仅仅只有频分和时分两种形式。1923年美国数学家沃尔什(WALSH)提出的沃尔什函数就是一种正交完备的函数系。本文在理论上提出了一种以沃尔什函数为基础的序率分割制(SDM),并以实验证明了新方案是可行的。文中详细地介绍了这种SDM系统的设计思想、方框图、工作原理以及具体实施中的技术问题。实验室研制成的样机是沃尔什调幅——调频制的,称为WAM-FM遥测系统。为了阐明新系统的优越性及其潜力,把它与现行的频分遥测系统作了简单的比较。说明新系统不仅具有一定的学术价值,而且具有一定的实用价值。
According to the theory of orthogonal division, the popular frequency division (FDM) and time division (TDM) systems now belong to the category of orthogonal division. The signal that satisfies the orthogonal condition is not only in the form of frequency division and time division. The Walsh function proposed by the American mathematician Walsh in 1923 is an orthonormal complete function system. In this paper, we propose a sequential rate partitioning (SDM) based on Walsh function theoretically and prove the new scheme is feasible by experiments. This article describes in detail the design of this SDM system, the block diagram, working principle and the specific implementation of the technical issues. Laboratory prototype developed by Walsh amplitude modulation - FM system, known as the WAM-FM telemetry system. In order to clarify the superiority of the new system and its potential, a simple comparison with the existing frequency-division telemetry system was made. Explain the new system not only has a certain academic value, but also has some practical value.