FR2671249B1 - Procede et appareil d'annulation du bruit d'etalement de spectre. - Google Patents

Procede et appareil d'annulation du bruit d'etalement de spectre.

Info

Publication number
FR2671249B1
FR2671249B1 FR9116054A FR9116054A FR2671249B1 FR 2671249 B1 FR2671249 B1 FR 2671249B1 FR 9116054 A FR9116054 A FR 9116054A FR 9116054 A FR9116054 A FR 9116054A FR 2671249 B1 FR2671249 B1 FR 2671249B1
Authority
FR
France
Prior art keywords
canceling
spectrum spread
spread noise
noise
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.)
Expired - Fee Related
Application number
FR9116054A
Other languages
English (en)
Other versions
FR2671249A1 (fr
Inventor
James H Stilwell
Reuven Meidan
Michael Kotzin
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.)
Motorola Solutions Inc
Original Assignee
Motorola Inc
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 US07/723,106 external-priority patent/US5235612A/en
Application filed by Motorola Inc filed Critical Motorola Inc
Publication of FR2671249A1 publication Critical patent/FR2671249A1/fr
Application granted granted Critical
Publication of FR2671249B1 publication Critical patent/FR2671249B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H04B1/7097—Interference-related aspects
    • H04B1/7103—Interference-related aspects the interference being multiple access interference
    • H04B1/7107—Subtractive interference cancellation
    • H04B1/71075—Parallel interference cancellation
    • 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
    • H04B1/12—Neutralising, balancing, or compensation arrangements
    • H04B1/123—Neutralising, balancing, or compensation arrangements using adaptive balancing or compensation means
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/20—Modulator circuits; Transmitter circuits
    • H04L27/2032—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner
    • H04L27/2053—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases
    • H04L27/206—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers
    • H04L27/2067—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers with more than two phase states
    • H04L27/2071—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers with more than two phase states in which the data are represented by the carrier phase, e.g. systems with differential coding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/22—Demodulator circuits; Receiver circuits
    • H04L27/227—Demodulator circuits; Receiver circuits using coherent demodulation
    • H04L27/2271—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses only the demodulated signals
    • H04L27/2273—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses only the demodulated signals associated with quadrature demodulation, e.g. Costas loop

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Noise Elimination (AREA)
FR9116054A 1991-06-28 1991-12-23 Procede et appareil d'annulation du bruit d'etalement de spectre. Expired - Fee Related FR2671249B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/723,106 US5235612A (en) 1990-12-21 1991-06-28 Method and apparatus for cancelling spread-spectrum noise

Publications (2)

Publication Number Publication Date
FR2671249A1 FR2671249A1 (fr) 1992-07-03
FR2671249B1 true FR2671249B1 (fr) 1996-02-09

Family

ID=24904872

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9116054A Expired - Fee Related FR2671249B1 (fr) 1991-06-28 1991-12-23 Procede et appareil d'annulation du bruit d'etalement de spectre.

Country Status (1)

Country Link
FR (1) FR2671249B1 (fr)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4470138A (en) * 1982-11-04 1984-09-04 The United States Of America As Represented By The Secretary Of The Army Non-orthogonal mobile subscriber multiple access system
US4962507A (en) * 1989-09-29 1990-10-09 Hughes Aircraft Company Feed forward spread spectrum signal processor

Also Published As

Publication number Publication date
FR2671249A1 (fr) 1992-07-03

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Legal Events

Date Code Title Description
BR Restoration of rights
ST Notification of lapse

Effective date: 20081020