外文文獻(xiàn)翻譯計(jì)算機(jī)及相關(guān)專業(yè)軟件實(shí)現(xiàn)2dpsk信號(hào)解調(diào)中英文對(duì)照-展示頁(yè)
2024-12-18 05:19本頁(yè)面
【正文】 andard 2DPSK signal because of the influence of various external has shown the engineering signal waveform of a kind of equipment. Through paring with the simulation waveform of theory, we can find out paratively that theoretical 2DPSK signal and physical systematic signal waveform have following difference mainly, these differences is to be used as regular source of software detection information. These differences are as follows: Figure 2 shows the engineering signal waveform of a device (1)Signal range exists tremble, especially the signal range at the two side of the phase point ofsudden change have obvious reduce 。 The suddenphasechange point can be found out by that difference。 bN :the number of points(type b)which sign is not change between the left crosszero point and right crosszero point。 2) From a other aspect,the law of the amplitude has produced change at suddenchange point. To analyze the point class of type a,the number of point from the left crosszero point are two time of the gerneral point of that。科技文章 摘譯 1 Software Realization of Nonstandard 2DPSK Signal Demodulation AbstractUnder the base of 2 differential PhaseShift Keying(2DPSK) principle, the soft demodulation method of IPSK(Ideal PhaseShift Keying signal) is studied. The difference between ideal and practical 2DPSK waveform is used by us to realize the demodulation of nonstandard 2DPSK signal by puter software. A effective and universal engineering method for nonstandard 2DPSK signal demodulation is designed. 1 Introduction The carrier transfer of digital signal play a important role in digital signal munication keying is used widely for its ability of antinoise and high band used rate. It is very importantto analyze digital munication system, especially tostudy the characteristics of modulated signal in digitalmunicat
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