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CA2111170A1 - Technique for Determining Signal Dispersion Characteristics in Communications Systems - Google Patents

Technique for Determining Signal Dispersion Characteristics in Communications Systems

Info

Publication number
CA2111170A1
CA2111170A1 CA2111170A CA2111170A CA2111170A1 CA 2111170 A1 CA2111170 A1 CA 2111170A1 CA 2111170 A CA2111170 A CA 2111170A CA 2111170 A CA2111170 A CA 2111170A CA 2111170 A1 CA2111170 A1 CA 2111170A1
Authority
CA
Canada
Prior art keywords
correlators
signal
outputs
cyclic fashion
output
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
CA2111170A
Other languages
French (fr)
Other versions
CA2111170C (en
Inventor
Jin-Der Wang
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.)
Conexant Inc
Original Assignee
American Telephone and Telegraph Co 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 to DE69022715T priority Critical patent/DE69022715T2/en
Priority to EP90313332A priority patent/EP0446523B1/en
Priority to CA002033931A priority patent/CA2033931C/en
Priority to KR1019910003643A priority patent/KR940008123B1/en
Priority to JP3069500A priority patent/JPH04220892A/en
Priority to US07/728,824 priority patent/US5260972A/en
Priority claimed from US07/728,827 external-priority patent/US5090600A/en
Priority to US08/089,153 priority patent/US5406586A/en
Application filed by American Telephone and Telegraph Co Inc filed Critical American Telephone and Telegraph Co Inc
Priority to CA 2111170 priority patent/CA2111170C/en
Publication of CA2111170A1 publication Critical patent/CA2111170A1/en
Application granted granted Critical
Publication of CA2111170C publication Critical patent/CA2111170C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N17/00—Diagnosis, testing or measuring for television systems or their details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • Multimedia (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Time-Division Multiplex Systems (AREA)

Abstract

The present invention relates to an apparatus and a method for use in a communications system wherein a received signal is sampled. The apparatus is comprised of a unit for demultiplexing the received signal samples onto a plurality of output terminals in a cyclic fashion. A plurality of sub-correlators are provided, each connected to a different one of the output terminals and providing and output. A multiplexing unit are provided for multiplexing the outputs of the plurality of sub-correlators in the cyclic fashion. Finally, a unit is provided which is responsive to the multiplexed outputs of the plurality of correlators for determining at least one signal dispersion characteristic. The method, therefore is comprised of the steps of demultiplexing samples of a signal onto a plurality of output terminals in a cyclic fashion; coupling each output terminal to an associated correlator in a plurality of correlators, each correlator receiving the samples from a differentoutput terminal and providing a correlated output signal; and multiplexing the outputs of the plurality of correlators in the cyclic fashion. The method also includes the step of determining at least one signal dispersion characteristic to respond to the multiplexed outputs of the plurality of correlators.
CA 2111170 1990-03-13 1993-12-10 Technique for determining signal dispersion characteristics in communications systems Expired - Fee Related CA2111170C (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
DE69022715T DE69022715T2 (en) 1990-03-13 1990-12-07 Determination of dispersion properties of a telecommunication transmission channel from a received test sequence after correlation and duplication.
EP90313332A EP0446523B1 (en) 1990-03-13 1990-12-07 Determination of dispersion characteristics of a communication channel from a received training sequence processed by correlation and replication
CA002033931A CA2033931C (en) 1990-03-13 1991-01-10 Technique for determining signal dispersion characteristics in communications systems
KR1019910003643A KR940008123B1 (en) 1990-03-13 1991-03-07 Technique for determining signal dispersion characteristics in communication systems
JP3069500A JPH04220892A (en) 1990-03-13 1991-03-11 Transmitter corresponding to signal dispersion, television signal transmitter apparatus, receiver, communication system and method of deciding signal dispersing characteristic
US07/728,824 US5260972A (en) 1990-03-13 1991-07-09 Technique for determining signal dispersion characteristics in communications systems
US08/089,153 US5406586A (en) 1991-07-09 1993-07-08 Signal correlation technique
CA 2111170 CA2111170C (en) 1990-03-13 1993-12-10 Technique for determining signal dispersion characteristics in communications systems

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US49301790A 1990-03-13 1990-03-13
US07/728,827 US5090600A (en) 1990-06-25 1991-07-09 Liquid pressure opened pouring spout
CA 2111170 CA2111170C (en) 1990-03-13 1993-12-10 Technique for determining signal dispersion characteristics in communications systems

Publications (2)

Publication Number Publication Date
CA2111170A1 true CA2111170A1 (en) 1995-06-11
CA2111170C CA2111170C (en) 1999-06-29

Family

ID=27169655

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2111170 Expired - Fee Related CA2111170C (en) 1990-03-13 1993-12-10 Technique for determining signal dispersion characteristics in communications systems

Country Status (1)

Country Link
CA (1) CA2111170C (en)

Also Published As

Publication number Publication date
CA2111170C (en) 1999-06-29

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed