JPS57157651A - Receiver - Google Patents

Receiver

Info

Publication number
JPS57157651A
JPS57157651A JP56042953A JP4295381A JPS57157651A JP S57157651 A JPS57157651 A JP S57157651A JP 56042953 A JP56042953 A JP 56042953A JP 4295381 A JP4295381 A JP 4295381A JP S57157651 A JPS57157651 A JP S57157651A
Authority
JP
Japan
Prior art keywords
filter
frequency
inputted
taken
controlling section
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP56042953A
Other languages
Japanese (ja)
Other versions
JPS6336697B2 (en
Inventor
Toshiaki Ito
Hiroshi Harada
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP56042953A priority Critical patent/JPS57157651A/en
Priority to US06/360,536 priority patent/US4435821A/en
Priority to EP82301538A priority patent/EP0061351B1/en
Priority to DE8282301538T priority patent/DE3265965D1/en
Publication of JPS57157651A publication Critical patent/JPS57157651A/en
Publication of JPS6336697B2 publication Critical patent/JPS6336697B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/713—Spread spectrum techniques using frequency hopping
    • H04B1/7156—Arrangements for sequence synchronisation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/713—Spread spectrum techniques using frequency hopping
    • H04B1/7156—Arrangements for sequence synchronisation
    • H04B2001/71563—Acquisition

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)

Abstract

PURPOSE:To remove the mixer spurious of a receiver and disturbance and interference coming from the outside, by switching a filter to one having a narrow band width when synchronization is taken, and by changing the center frequency in accordance with frequency variations at the transmitting side. CONSTITUTION:Since synchronizations cannot be taken at the initial state of reception, a high-frequency by-pass switch 3 becomes conductive and a high frequency input is inputted into a controlling section 5 and demodulating section 6 through a broad band filter 2. When synchronization is taken at the controlling section 5, the high frequency by-pass switch 3 becomes nonconductive and a switch 9 becomes conductive, and the high frequency input is inputted into a filter 4. From the controlling section 5, such a digital output that it changes the center frequency of a band which passes through the filter 4 having a narrow band width in accordance with variations in frequency at the transmitting side, is outputted and the digital output is inputted into a D/A converting section 7. The center frequency of the band passing through the filter 4 is changed under control from the outside.
JP56042953A 1981-03-24 1981-03-24 Receiver Granted JPS57157651A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP56042953A JPS57157651A (en) 1981-03-24 1981-03-24 Receiver
US06/360,536 US4435821A (en) 1981-03-24 1982-03-22 Receiver in a frequency hopping communication system
EP82301538A EP0061351B1 (en) 1981-03-24 1982-03-24 Receiver in a frequency hopping communication system
DE8282301538T DE3265965D1 (en) 1981-03-24 1982-03-24 Receiver in a frequency hopping communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56042953A JPS57157651A (en) 1981-03-24 1981-03-24 Receiver

Publications (2)

Publication Number Publication Date
JPS57157651A true JPS57157651A (en) 1982-09-29
JPS6336697B2 JPS6336697B2 (en) 1988-07-21

Family

ID=12650377

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56042953A Granted JPS57157651A (en) 1981-03-24 1981-03-24 Receiver

Country Status (1)

Country Link
JP (1) JPS57157651A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03167929A (en) * 1989-11-28 1991-07-19 Tech Res & Dev Inst Of Japan Def Agency Transmitter
JPH03297234A (en) * 1990-04-16 1991-12-27 Hitachi Ltd Spread spectrum receiver
EP0776089A1 (en) * 1995-11-27 1997-05-28 SANYO ELECTRIC Co., Ltd. Radio receiver having automatic broadcasting-station selecting function

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03167929A (en) * 1989-11-28 1991-07-19 Tech Res & Dev Inst Of Japan Def Agency Transmitter
JPH03297234A (en) * 1990-04-16 1991-12-27 Hitachi Ltd Spread spectrum receiver
EP0776089A1 (en) * 1995-11-27 1997-05-28 SANYO ELECTRIC Co., Ltd. Radio receiver having automatic broadcasting-station selecting function
US6122493A (en) * 1995-11-27 2000-09-19 Sanyo Electric Co., Ltd. Radio receiver having automatic broadcasting-station selecting function

Also Published As

Publication number Publication date
JPS6336697B2 (en) 1988-07-21

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