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    • 2. 发明授权
    • Radar target identification system
    • 雷达目标识别系统
    • US3614779A
    • 1971-10-19
    • US3614779D
    • 1962-12-14
    • US ARMY
    • SOMMER HELMUTSALERNO JAMES
    • G01S7/41G01S13/52G01S9/02G01S9/08
    • G01S7/415G01S13/52
    • 1. The method of identifying an object detected by a short range, high-resolution radar having a transmitter which includes means for generating a pulse modulated continuous wave output signal, antenna means connected to said transmitter for radiating the pulse modulated continuous wave output signal generated by said transmitter and for receiving reflected signals of the radiated signal, and a receiver connected to said antenna means, said method comprising the steps of A. COMBINING THE REFLECTED SIGNALS FROM SAID OBJECT WITH A CONSTANT PHASE SIGNAL OF THE SAME FREQUENCY OVER SEVERAL PULSE PERIODS TO PRODUCE A SIGNAL HAVING THE SAME FREQUENCY OF THE COMBINED SIGNALS BUT WHICH IS AMPLITUDE MODULATED DUE TO THE VARIATION IN PHASE RELATION BETWEEN SAID REFLECTED SIGNALS AND SAID CONSTANT PHASE SIGNAL CAUSED BY THE VIBRATION OF SAID DETECTED OBJECT, B. FILTERING THE AMPLITUDE MODULATED SIGNAL TO DETECT THE MODULATION SIGNAL, AND C. AUDIBLY REPRODUCING THE MODULATION SIGNAL TO PROVIDE A CONTINUOUS INDICATION OF THE NATURE OF SAID DETECTED OBJECT.
    • 4. 发明授权
    • Method and apparatus for measuring the distance between two stations
    • 测量两站距离的方法和装置
    • US4072946A
    • 1978-02-07
    • US712053
    • 1976-08-06
    • Wim B. S. M. Kneefel
    • Wim B. S. M. Kneefel
    • G01S13/76G01S13/82G01S9/08G01S9/56
    • G01S13/765G01S13/825
    • A method and system for determining the distance between two stations interconnected through a carrier wave connection for data transmission by frequency modulation (FM) or phase modulation (PM) and, if necessary, transferring the data concerning the distance determined. At least one of the two stations is movable and each station comprises a transmitter, a receiver and a transceiver antenna for said FM or PM data transmission. During operation the antennas are interlocked. The carrier wave transmitted by the first station and being normally FM or PM modulated by data signals is interrupted a number of times in this station. Upon detection of each one of these interruptions, the second station introduces a similar, corresponding interruption into the carrier wave transmitted by this second station. The carrier wave is normally also FM or PM modulated by data signals. The period of time between the transmission and reception of the associated interruptions is measured in the first station as a measure of the distance between the stations.
    • 一种用于确定通过频率调制(FM)或相位调制(PM)进行数据传输的载波互联互连的两个站之间的距离的方法和系统,并且如果需要,传送关于确定的距离的数据。 两个站中的至少一个是可移动的,并且每个站包括用于所述FM或PM数据传输的发射机,接收机和收发天线。 在操作过程中天线互锁。 由第一站发送的并且被数据信号调制的FM或PM正常的载波在该站中被多次中断。 在检测到这些中断中的每一个时,第二站对由该第二站发送的载波引入类似的相应中断。 载波通常也是由数据信号调制的FM或PM。 在第一站中测量相关中断的发送和接收之间的时间段作为站间距离的度量。