CA2052314A1 - Spread spectrum communications system - Google Patents

Spread spectrum communications system

Info

Publication number
CA2052314A1
CA2052314A1 CA002052314A CA2052314A CA2052314A1 CA 2052314 A1 CA2052314 A1 CA 2052314A1 CA 002052314 A CA002052314 A CA 002052314A CA 2052314 A CA2052314 A CA 2052314A CA 2052314 A1 CA2052314 A1 CA 2052314A1
Authority
CA
Canada
Prior art keywords
receiver
carrier
clock
chip clock
spread spectrum
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
CA002052314A
Other languages
French (fr)
Other versions
CA2052314C (en
Inventor
Andrzej Partyka
Lee F. Crowley
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.)
Pittway Corp
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2052314A1 publication Critical patent/CA2052314A1/en
Application granted granted Critical
Publication of CA2052314C publication Critical patent/CA2052314C/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H04B1/707—Spread spectrum techniques using direct sequence modulation

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Transmitters (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
  • Circuits Of Receivers In General (AREA)
  • Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)

Abstract

A spread spectrum communication system for direct sequence transmission of digital information having a modulation format which is particularly suitable for indoor communication within residential, office and industrial structures. The modulation format combines BPSK or MSK
spreading with FM carrier modulation by data bits and a carrier frequency shift whose magnitude is related to both a chip rate and a spreading sequence length. The carrier, chip clock and data clock are all synchronous and the sequence length is an integral submultiple of the bit length. The system reduces the frequency error between the transmitter chip clock and the receiver chip clock to permit the elimination of a code phase tracking loop in the receiver to reduce the receiver complexity. The receiver has an extended dynamic range which makes possible the reception of very strong signal without an automatic gain control loop (AGC) as well as reducing the time needed for code phase acquisition. The transmission system is highly resistant to CW jamming and short distance multipath effects.
CA002052314A 1990-09-27 1991-09-26 Spread spectrum communications system Expired - Lifetime CA2052314C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/589,323 1990-09-27
US07/589,323 US5121407A (en) 1990-09-27 1990-09-27 Spread spectrum communications system

Publications (2)

Publication Number Publication Date
CA2052314A1 true CA2052314A1 (en) 1992-03-28
CA2052314C CA2052314C (en) 2001-07-17

Family

ID=24357536

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002052314A Expired - Lifetime CA2052314C (en) 1990-09-27 1991-09-26 Spread spectrum communications system

Country Status (5)

Country Link
US (4) US5121407A (en)
EP (1) EP0477862B1 (en)
AT (1) ATE146921T1 (en)
CA (1) CA2052314C (en)
DE (1) DE69123806D1 (en)

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Also Published As

Publication number Publication date
US5241562A (en) 1993-08-31
CA2052314C (en) 2001-07-17
USRE35650E (en) 1997-11-04
EP0477862B1 (en) 1996-12-27
EP0477862A2 (en) 1992-04-01
USRE35209E (en) 1996-04-16
US5121407A (en) 1992-06-09
ATE146921T1 (en) 1997-01-15
EP0477862A3 (en) 1993-01-20
DE69123806D1 (en) 1997-02-06

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Effective date: 20110926