CA2354687A1 - Synchronous spread-spectrum communications system and method - Google Patents

Synchronous spread-spectrum communications system and method Download PDF

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Publication number
CA2354687A1
CA2354687A1 CA002354687A CA2354687A CA2354687A1 CA 2354687 A1 CA2354687 A1 CA 2354687A1 CA 002354687 A CA002354687 A CA 002354687A CA 2354687 A CA2354687 A CA 2354687A CA 2354687 A1 CA2354687 A1 CA 2354687A1
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CA
Canada
Prior art keywords
chip
signal
generic
message
code
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
CA002354687A
Other languages
French (fr)
Other versions
CA2354687C (en
Inventor
Donald L. Schilling
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.)
InterDigital Technology 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
Priority claimed from US07/626,109 external-priority patent/US5228056A/en
Application filed by Individual filed Critical Individual
Priority to CA002583679A priority Critical patent/CA2583679C/en
Priority claimed from CA002320678A external-priority patent/CA2320678C/en
Publication of CA2354687A1 publication Critical patent/CA2354687A1/en
Application granted granted Critical
Publication of CA2354687C publication Critical patent/CA2354687C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

ABSTRACT

A spread spectrum communications system for use over a communication channel, including a transmitter-generic--chip-code generator (101), a transmitter-message-chip--code generator (102), an EXCLUSIVE-OR gate(103), a combiner (104), a transmitter (107), a receiver-generic--chip-code generator (121), a receiver-generic mixer (123), a generic-bandpass filter (125), a receiver--message-chip-code generator (122), a receiver-message mixer (124), a message-bandpass filter (126), and a synchronous detector (139). The transmitter-generic--chip-code generator (101) generates a generic-chip-code signal and the transmitter-message-chip-code generator (102) generates a message-chip-code signal. The EXCLUSIVE-OR gate (103) spread-spectrum process message data with the message-chip-code signal to generate a spread-spectrum signal. The transmitter (107) transmits the combined generic-chip-code signal and spread-spectrum signal, on a carrier signal (108) over the communications channel as a spread-spectrum-communications signal. The receiver-generic-chip-code generator (121) generates a replica of the generic-chip-code signal. The generic mixer (123) recovers the carrier signal from the spread--spectrum-communications signal. The receiver-message--chip-code generator (122) generates a replica of the message-chip-code signal. The receiver-message mixer (124) despreads the spread-spectrum-communications signal as a modulated-data signal. The tracking and acquisition circuit (121) uses the recovered carrier signal for synchronizing the replicas of the generic-chip-code signal to the recovered carrier signal. The synchronous detector (139) synchronously demodulates the modulated--data signal as received data.
CA002354687A 1990-12-14 1991-12-10 Synchronous spread-spectrum communications system and method Expired - Lifetime CA2354687C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA002583679A CA2583679C (en) 1990-12-14 1991-12-10 Synchronous spread-spectrum communications system and method

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US07/626,109 1990-12-14
US07/626,109 US5228056A (en) 1990-12-14 1990-12-14 Synchronous spread-spectrum communications system and method
CA002320678A CA2320678C (en) 1990-12-14 1991-12-10 Synchronous spread-spectrum communications system and method

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CA002320678A Division CA2320678C (en) 1990-12-14 1991-12-10 Synchronous spread-spectrum communications system and method

Related Child Applications (1)

Application Number Title Priority Date Filing Date
CA002583679A Division CA2583679C (en) 1990-12-14 1991-12-10 Synchronous spread-spectrum communications system and method

Publications (2)

Publication Number Publication Date
CA2354687A1 true CA2354687A1 (en) 1992-06-15
CA2354687C CA2354687C (en) 2007-07-03

Family

ID=25682117

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002354687A Expired - Lifetime CA2354687C (en) 1990-12-14 1991-12-10 Synchronous spread-spectrum communications system and method

Country Status (1)

Country Link
CA (1) CA2354687C (en)

Also Published As

Publication number Publication date
CA2354687C (en) 2007-07-03

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