baud (信号速度单位) 波德 hand flag (信号旗) 手旗 simple progressive system (交通信号) 简单行进式系统 three letter signal (国际信号规则的) 三字母信号 time reference line (系统信号时距图上的) 时间基线 Juno (小行星3号) 婚神星 special SG (弹丸号名) 特号SG ...
PURPOSE: To prevent the contents of information reproduced from a frequency- modulated signal from being influenced by the variation of carrier frequency by supplying the reference level of a demodulated signal to a setting device for controlling the amplitude of a demodulation signal. CONSTITUTION: A...
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一种可改善解调特性的频率调制信号解调电路,其正交检波器电路输出的频调信号的同相分量(I)和正交分量(Q)分别由一取样时间延时. One kind can improve demodulation characteristics of a frequency modulation signal demodulation circuit of the quadrature detector circuit output signal of the frequency modulation pha...
The first, the glide signal, moved from its initial frequency over a linear path to its final frequency. The second, the step signal, was the same except that its trajectory followed a series of discrete steps in frequency. As the number of steps in the step signal increased, the duration...
Disclosed is an information signal discriminating apparatus adapted to ascertain the type of an information signal which includes a synchronizing signal and which is modulated by one of a plurality of types of modulation carrier signals ... S Nakazato - US 被引量: 5发表: 1992年 Radar device, ...
To detect whether an input FM signal, such as a reproduced video signal, which includes particular frequency components representing predetermined information, was recorded in a first or second mode, with the modes having different frequency bands, a first output signal is produced when a particular...
zero crossing detector two consecutive zero-crossings of the lower frequency of the two signal frequencies of the FFSK signal for sychronization of the ... VAN TOL, NICOLAAS 被引量: 12发表: 1985年 Demodulation of Frequency-Modulated Signals by Pseudorandomly Selected Zero-Crossing Instants The ...
Two additional frequency modulated signals are described that are different from the linear-FM signal discussed in the previous chapter. The first is the Costas signal, in which the frequency evolution is random-like, in contrast with the linear evolution in LFM. The resulting ambiguity function (...