CA941972A - Walsh function generator - Google Patents

Walsh function generator

Info

Publication number
CA941972A
CA941972A CA119,255A CA119255A CA941972A CA 941972 A CA941972 A CA 941972A CA 119255 A CA119255 A CA 119255A CA 941972 A CA941972 A CA 941972A
Authority
CA
Canada
Prior art keywords
function generator
walsh function
walsh
generator
function
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
CA119,255A
Other versions
CA119255S (en
Inventor
George G. Nacht
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.)
US Department of Navy
Original Assignee
US Department of Navy
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 US Department of Navy filed Critical US Department of Navy
Application granted granted Critical
Publication of CA941972A publication Critical patent/CA941972A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits
    • H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
    • H04L25/4906—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using binary codes
    • H04L25/4908—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using binary codes using mBnB codes

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Complex Calculations (AREA)
CA119,255A 1970-08-24 1971-07-27 Walsh function generator Expired CA941972A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US6641870A 1970-08-24 1970-08-24

Publications (1)

Publication Number Publication Date
CA941972A true CA941972A (en) 1974-02-12

Family

ID=22069371

Family Applications (1)

Application Number Title Priority Date Filing Date
CA119,255A Expired CA941972A (en) 1970-08-24 1971-07-27 Walsh function generator

Country Status (2)

Country Link
US (1) US3701143A (en)
CA (1) CA941972A (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT976114B (en) * 1972-12-20 1974-08-20 Cselt Centro Studi Lab Telecom WALSH SERIAL FUNCTION GENERATOR
FR2460050A1 (en) * 1979-06-22 1981-01-16 Thomson Csf DIGITAL DATA HYPERFREQUENCY TRANSMISSION SYSTEM
US6275679B1 (en) * 1985-06-24 2001-08-14 The United States Of America As Represented By The Secretary Of The Air Force Secure communication using array transmitter
NL8700175A (en) * 1987-01-26 1988-08-16 Philips Nv METHOD FOR TRANSFERRING INFORMATION BY CODE SIGNALS, INFORMATION TRANSMISSION SYSTEM FOR CARRYING OUT THE METHOD, AND TRANSMITTING AND RECEIVING DEVICE FOR USE IN THE TRANSMISSION SYSTEM.
US5311176A (en) * 1992-03-31 1994-05-10 Motorola, Inc. Method and apparatus for generating Walsh codes
US6311202B1 (en) 1999-03-12 2001-10-30 Lucent Technologies Inc. Hardware efficient fast hadamard transform engine
DE10028593C1 (en) * 2000-06-14 2001-10-18 Daimler Chrysler Ag Digital/analogue signal conversion method uses transformation with orthogonal functions and determination of coefficients for re-conversion into analogue range
JP4454109B2 (en) * 2000-06-14 2010-04-21 日本テキサス・インスツルメンツ株式会社 Method and apparatus for improving signal-to-noise ratio in digital-to-analog conversion processing of a pulse density modulation signal (PDM)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2769968A (en) * 1953-07-13 1956-11-06 Bendix Aviat Corp Matrix type decoding circuit for binary code signals
US2894254A (en) * 1953-12-10 1959-07-07 Raytheon Co Conversion of binary coded information to pulse pattern form
US3192520A (en) * 1960-04-13 1965-06-29 Sperry Rand Corp Binary-to-digital translation apparatus
NL288933A (en) * 1961-10-18
US3618077A (en) * 1970-07-24 1971-11-02 Us Navy Walsh function generator

Also Published As

Publication number Publication date
US3701143A (en) 1972-10-24

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