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    • 34. 发明授权
    • Locating noise in communications systems
    • 定位通信系统中的噪声
    • US4303808A
    • 1981-12-01
    • US83492
    • 1979-10-10
    • Thomas Oswald
    • Thomas Oswald
    • G01R31/08G01R31/11H04B3/46
    • G01R31/086G01R31/11H04B3/46
    • An impulse noise source in a bidirectional submerged communications system is positionally located by detection apparatus at one end of the system which measures the time interval between the same impulse arriving twice at the one end of the system, firstly, via a shorter or faster path in the system (either the incoming path to the one end, or a reference frequency band in the incoming path) and, secondly, via a longer or slower path in the system (either the go path from the noise source, a go/return distant loop and the incoming path, or another frequency band in the incoming path). Group delay distortion of the system affects the location accuracy and is equalized by networks in the detection apparatus.
    • 双向水下通信系统中的脉冲噪声源位于系统一端的检测装置的位置,该系统测量在系统一端两次到达的相同脉冲之间的时间间隔,首先通过较短或更快的路径 系统(到达一端的传入路径,或入站路径中的参考频带),其次,通过系统中较长或较慢的路径(来自噪声源的路径,远程/远程 循环和传入路径,或入站路径中的另一个频带)。 系统的组延迟失真会影响定位精度,并由检测装置中的网络进行均衡。