CN86208084U - Ask-psk调制器 - Google Patents

Ask-psk调制器

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Publication number
CN86208084U
CN86208084U CN 86208084 CN86208084U CN86208084U CN 86208084 U CN86208084 U CN 86208084U CN 86208084 CN86208084 CN 86208084 CN 86208084 U CN86208084 U CN 86208084U CN 86208084 U CN86208084 U CN 86208084U
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China
Prior art keywords
psk
circuit
signal
ask
modulator
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CN 86208084
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English (en)
Inventor
任翼龙
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Individual
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Individual
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Priority to CN 86208084 priority Critical patent/CN86208084U/zh
Publication of CN86208084U publication Critical patent/CN86208084U/zh
Withdrawn legal-status Critical Current

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Abstract

本实用新型是属于电信技术领域，用于VLF通信发射系统，以消除PSK信号通过发射机因相位突变产生的过压放电，使发射机系统能正常工作。它是利用组合调制方法，使PSK信号相位突变时载频电压很小或者无载频输出，这时相位突变不会使发射机产生过压放电。它是由ASK和PSK信号组合而成。

Description

本发明是属于电信技术领域，用于VLF通信发射系统，以消除PSK信号通过发射机因相位突变产生的过压放电，使发射系统能正常工作。
目前，在VLF通信系统中未能应用PSK信号，只使用ASK和FSK信号，主要原因在于相位突变时产生过压放电，使发射系统不能正常工作。众所周之，PSK信号的抗干扰性好，频带窄，功率利用率高和解调比较容易等优点在VLF系统上未能发挥效益。因此，国内外在VLF系统上作过多次试验，均因相位突变时过压放电不能实际使用。
本发明是利用组合调制方法，使PSK信号相位突变时载频电压很小或者无载频输出。这时相位突变不会使发射机产生过压放电，它是由ASK和PSK信号组合而成的。ASK－PSK调制器是由与非门1－3和二极管D1构成防抖动电路，其输出通过BG1、BG2和D2、D2组成微分电路，输出微分脉冲去触发集成反相器IC1改变载频相位，为得出正确相位，在集成反相器IC1上加有与非门13和14构成的延时半码元定位脉冲，确保移相信号有正确相位关系。一组由与非门5、6和7及另一组与非门9、10和11组成延时电路，控制码元间隔形成ASK信号，再由前沿小于后沿的脉冲上升和下降的指数波形成电路BG3、BG4和BG5组成，去调制已移相后的载频幅度，另一路前沿小于后沿的脉冲上升和下降的指数波形成电路BG6、BG7和BG8组成，去调制已移相后的载频幅度。两路ASK调制器分别由集成白路IC2～IC5构成，其输出信号由电阻R22、R23和R24组成两路模拟和电路，形成ASK－PSK调制信号。
本发明主要用于VLF发射机发PSK信号时，解决因过压放电不能正常工作。整个VLF系统不能应用PSK调制信号系统工作。

Claims (5)

  1. 幅度键控--相位键控调制器
    1、本发明幅度键控(ASK)-相位键控(PSK)调制器是属于电信技术领域，用于VLF通信技术发射系统，以消除PSK信号通过发射机因相位突变产生过压放电使系统不能正常工作的问题。其特征是由ASK调制和PSK调制电路组合构成。
  2. 2、按权利要求1规定的电路，其特征是两路PSK调制信号受两路ASK信号调制，再经过模拟和电路输出。
  3. 3、按权利要求1或2规定的电路，其特征是由一组与非门5，6和7及另一组与非门9，10和11组成延时码元间隔电路。
  4. 4、按权利要求1或2规定的电路，其特征是两路ASK信号均加有前沿小于后沿的脉冲上升和下降的指数形电路，以消除PSK信号通过发射机产生过压放电。
  5. 5、按权利要求1或2规定的电路，其特征是PSK调制器加有延时半码元定位脉冲，以确定PSK调制信号有正确的相位关系。
CN 86208084 1986-10-16 1986-10-16 Ask-psk调制器 Withdrawn CN86208084U (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 86208084 CN86208084U (zh) 1986-10-16 1986-10-16 Ask-psk调制器

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 86208084 CN86208084U (zh) 1986-10-16 1986-10-16 Ask-psk调制器

Publications (1)

Publication Number Publication Date
CN86208084U true CN86208084U (zh) 1987-12-23

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ID=4810367

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 86208084 Withdrawn CN86208084U (zh) 1986-10-16 1986-10-16 Ask-psk调制器

Country Status (1)

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CN (1) CN86208084U (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102130868B (zh) * 1993-03-25 2012-08-29 松下电器产业株式会社 通信系统

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102130868B (zh) * 1993-03-25 2012-08-29 松下电器产业株式会社 通信系统

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C15 Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993)
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C19 Lapse of patent right due to non-payment of the annual fee
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