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本文探讨了综合孔径射电望远镜系统采用相位开关调制的问题。文中引进一个简便的数学方法,对造成观测得到“假源”的几个主要因素进行了较详细的分析,并比较了各种不同的调制方式(包括采用多次调制和数字解调)在清除“假源”方面的意义和价值,给出了它们的定量关系和结果,从而得出从清除“假源”着眼选择相开关调制方案的原则及对某些接收机部件的要求,并得到较为合理的相开关调制方案。
This article explores the issue of using phase-switch modulation in integrated aperture radio telescope systems. In this paper, a simple mathematical method is introduced to analyze in detail the main factors that cause the “fake source” to be observed. Different modulation methods (including multiple modulation and digital demodulation) The significance and value of “fake source”, given their quantitative relations and results, come to clear the “fake source” focus on the choice of phase switching modulation scheme and the requirements of certain receiver components, and get more Reasonable phase switching modulation scheme.