GB1445733A - Underwater transmission system - Google Patents

Underwater transmission system

Info

Publication number
GB1445733A
GB1445733A GB3011473A GB3011473A GB1445733A GB 1445733 A GB1445733 A GB 1445733A GB 3011473 A GB3011473 A GB 3011473A GB 3011473 A GB3011473 A GB 3011473A GB 1445733 A GB1445733 A GB 1445733A
Authority
GB
United Kingdom
Prior art keywords
frequency
circuit
path
operational amplifier
mixer
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.)
Expired
Application number
GB3011473A
Other languages
English (en)
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.)
Bpifrance Financement SA
Original Assignee
Agence National de Valorisation de la Recherche ANVAR
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 Agence National de Valorisation de la Recherche ANVAR filed Critical Agence National de Valorisation de la Recherche ANVAR
Publication of GB1445733A publication Critical patent/GB1445733A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B11/00—Transmission systems employing sonic, ultrasonic or infrasonic waves
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/12—Frequency diversity

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
GB3011473A 1972-06-23 1973-06-25 Underwater transmission system Expired GB1445733A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7222799A FR2189950B1 (US08066781-20111129-C00013.png) 1972-06-23 1972-06-23

Publications (1)

Publication Number Publication Date
GB1445733A true GB1445733A (en) 1976-08-11

Family

ID=9100715

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3011473A Expired GB1445733A (en) 1972-06-23 1973-06-25 Underwater transmission system

Country Status (4)

Country Link
US (1) US3893062A (US08066781-20111129-C00013.png)
DE (1) DE2331591C3 (US08066781-20111129-C00013.png)
FR (1) FR2189950B1 (US08066781-20111129-C00013.png)
GB (1) GB1445733A (US08066781-20111129-C00013.png)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2139788A (en) * 1983-01-10 1984-11-14 Dollman Electronics Limited Underwater communication

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE60030296T2 (de) * 2000-11-10 2007-08-30 Datalogic S.P.A., Lippo Di Calderara Di Reno Vorrichtung zum Lesen kodierter Informationen
JP3973630B2 (ja) * 2004-01-20 2007-09-12 シャープ株式会社 データ伝送装置およびデータ伝送方法
GB2415113B (en) * 2004-06-12 2006-10-18 Sonardyne Internat Ltd Robust underwater communication system
TWI578306B (zh) * 2015-06-10 2017-04-11 微物聯科技有限公司 混頻式聲波控制系統及其方法與內儲混頻式聲波控制程式之電腦程式產品

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2399469A (en) * 1940-07-31 1946-04-30 Gen Electric Secret signaling system
US2448055A (en) * 1944-02-21 1948-08-31 Standard Telephones Cables Ltd Wobbled frequency carrier wave communication system
US3466652A (en) * 1968-01-15 1969-09-09 California Inst Of Techn Time delay spectrometer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2139788A (en) * 1983-01-10 1984-11-14 Dollman Electronics Limited Underwater communication

Also Published As

Publication number Publication date
DE2331591B2 (de) 1974-10-10
FR2189950A1 (US08066781-20111129-C00013.png) 1974-01-25
DE2331591C3 (de) 1975-05-22
DE2331591A1 (de) 1974-01-03
FR2189950B1 (US08066781-20111129-C00013.png) 1977-04-01
US3893062A (en) 1975-07-01

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee