气象卫星接收装置的频率流程和频率综合器

为了接收全气象频段,本文提出了把频率综合器与接收机联合设计的方法,以得到最佳的性能价格比。在接收机的自动化设计中,频率综合器内设有计算机接口电路,使计算机可直接与频率综合器对接。我们在气象卫星接收设备中采用了数字锁相技术。本文分析了锁相环的噪声特性,以达到在数字锁相的频率综合器的设计中尽量减少干扰的频谱。

FREQUENCY CONVERSION PROCESS AND FREQUENCY SYNTHESIZER OF METEOROLOGICAL SATELLITE RECEPTION EQUIPMENT

This paper presents a method which combines the design of the freguency synthesizer with the design of a receiver, in order to receive all frequency band of meteorological satellite, for obtainning a optimum performance to cost ratio.For the purpose of automatic designing of receiver, there are computer interface circuits in frequency synthesizer. This means that computer may be connected directly to frequency synthesizer. Therefore the digital phase-locked technigues are used in meterological satllite reception equipment. In this paper we analys noise performance of phase-locked loop. The task in the design of a digital phase-locked frequency synthesizer, therefore, is to try to decrease the amplitude of interference spectrum.