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    Receiver for reception of modulated pulses lying in a given signal band
    11.
    发明授权
    Receiver for reception of modulated pulses lying in a given signal band 失效
    接收器在接收信号带中调制脉冲的接收器

    公开(公告)号：US3646447A

    公开(公告)日：1972-02-29

    申请号：US3646447D

    申请日：1970-10-21

    Applicant: PHILIPS CORP

    Inventor： GERWEN PETRUS JOSEPHUS VAN

    IPC: H03D1/22 ,  H04L27/06 ,  H04B1/18 ,  H03K9/00

    CPC classification number: H04L27/066 ,  H03D1/22

    Abstract: Receiver for the reception of pulses modulated on a carrier wave, comprising a device forming frequencies F1+f2 and f1-f2 from two transmitted pilot frequencies f1 and f2 from which the local carrier and clock signals respectively are derived. In order to reduce the phase shifts of these signals due to frequency shifts on the transmission path, the device comprises two automatic phase correction (AFC)-loops each including a phase discriminator and an oscillator, the incoming signals being applied to the phase discriminator of the first AFC-loop and the associated oscillator being tuned to f1 or f2, while the output voltage of said phase discriminator is applied both to the phase discriminator of the second AFC-loop whose oscillator is tuned to f1+f2 and to a selective circuit tuned to f1-f2.

    Receiver with pre and past detection phase equalization
    14.
    发明授权
    Receiver with pre and past detection phase equalization 失效
    接收器与前期和过去检测阶段均衡

    公开(公告)号：US3619789A

    公开(公告)日：1971-11-09

    申请号：US3619789D

    申请日：1968-12-30

    Applicant: PHILIPS CORP

    Inventor： JAGER FRANK DE ,  GERWEN PETRUS JOSEPHUS VAN

    IPC: H04L27/34 ,  H04L27/22 ,  H04B1/10

    CPC classification number: H04L27/22

    Abstract: A receiver for use with orthogonal modulation signals transmitted along a transmission link having a particular phase shift characteristic features predetection and postdetection phase equalizers. The predetection equalizer produces with the link phase characteristic a symmetrical about the carrier frequency phase characteristic. The postdetection equalizer produces with both the transmission link and predetection equalizer a linear phase characteristic.

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