Methods of measurement on radio receivers for various classes of emission - receivers for frequency - modulated sound broadcasting emissions 各種發射級別的無線電接收機的測量方法.調頻聲音廣播發射接收機
Methods of measurement on radio receivers for various classes of emission . part 4 : receivers for frequency - modulated sound broadcasting emissions 各種發射分級用無線電接收機的測量方法.第4部分:調頻聲廣播發射用接收機
Methods of measurement on radio receivers for various classes of emission - part 4 : receivers for frequency - modulated sound broadcasting emissions 各種發射類別的無線電接收機的測量方法.第4部分:調頻聲音廣播接收機的射頻測量
Methods of measurement on radio receivers for various classes of emission - part 4 : receivers for frequency - modulated sound broadcasting emissions iec 60315 - 4 : 1997 ; german version en 60315 - 4 : 1998 各種發射類別的無線電接收機的測量方法.第4部分:調頻
Methods of measuring and expressing the performance of radio receivers for sound broadcasting - measurement on frequency - modulated receivers of the response to impulsive interference 無線電廣播接收機性能測定及表示方法.第5部分:調頻接收機脈沖干擾響應測量
Linear frequency - modulated ( lfm , chirp ) signal that is often applied in radar , sonar and communications system is nonstationary signal , in which the frequency varies with time 應用于雷達、聲納和通信等信息系統中的線性調頻( lfm , chirp )信號是非平穩信號,即頻率成分是隨時間變化的。
We modulate the amplitude of the continuous single tune jamming by noise and produce the continuous noise - modulated jamming . this kind of jamming is effective to pc radar including linear frequency - modulated radar and bi - phase coded radar 在對單頻正弦波進行噪聲調幅后形成的噪聲調幅干擾對線性調頻雷達和二相編碼雷達都是有效干擾,其干擾特性和射頻噪聲干擾類似。
According to the target distance ( 5 ~ 50m ) , a c - band transceiver for ranging was presented in this thesis . the focus of this work was on designing a c - band frequency - modulated continuous - wave ( fmcw ) frequency source , a receiver and microstrip antenna 本文針對所探測目標的距離( 5 ~ 50m ) ,研制了c波段測距收發前端,主要包括c波段調頻連續波( fmcw )頻率源,接收電路以及微帶天線。
By analysis , two kinds of caq are found : one is width - modulated countable pulse series , the other is frequency - modulated countable pulse series . furthermore , the method of generating caq is described and its double features is also proved 通過分析找到兩種計數型模擬量:調寬計數脈沖串和調頻計數脈沖串,同時本文也闡述了計數型模擬量的產生方法,并進一步驗證了它的二象性特征。
Continuous single tune jamming is an effective jamming to linear frequency - modulated radar . however it can not suppress signal output after being full of the sidelobe suppress filter of the jammed bi - phase coded radar , no matter how great the power of it may be 單頻正弦波干擾對線性調頻雷達是一種有效干擾,但對于二相編碼雷達無論具有多大的功率在充滿二相編碼雷達接收機的旁瓣抑制濾波器后也不能壓制信號主瓣,因此是一種無效干擾。