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CA2044599A1 - Method of determining sampling time points - Google Patents

Method of determining sampling time points

Info

Publication number
CA2044599A1
CA2044599A1 CA2044599A CA2044599A CA2044599A1 CA 2044599 A1 CA2044599 A1 CA 2044599A1 CA 2044599 A CA2044599 A CA 2044599A CA 2044599 A CA2044599 A CA 2044599A CA 2044599 A1 CA2044599 A1 CA 2044599A1
Authority
CA
Canada
Prior art keywords
sampling time
time point
time points
channel
energy
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
CA2044599A
Other languages
French (fr)
Other versions
CA2044599C (en
Inventor
Lars Gustav Larsson
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.)
Telefonaktiebolaget LM Ericsson AB
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 CA2044599A1 publication Critical patent/CA2044599A1/en
Application granted granted Critical
Publication of CA2044599C publication Critical patent/CA2044599C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/0054—Detection of the synchronisation error by features other than the received signal transition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/04—Speed or phase control by synchronisation signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Symbol sequences having synchronization sequences are transmitted over a radio channel. Received signals are sampled in signal sampling time points (n) and by correlation a channel response (C2) is obtained. The impulse response is sampled (T) over a period (M x N) corresponding to time dispersion of the channel. For separate samples with separate start points (n), channel estimates are obtained (n - 0, 2, 4, 6, N = 1, 3, 5, 7,...) whose energy values are calculated, and the estimate (n = 8, 10, 12, 14) with the largest energy is selected. The first time point (n = 8) in this estimate is selected as sampling time point for the symbol sequence. Alternatively, the signal sampling time point (n = 9) with maximum energy value (C2 max) is selected. By comparing the energy values either one of these signal sampling time points (n = 8, n = 9) can be selected as the sampling time point for the symbol sequence. For consecutive sequences, an average value for the sampling time points is calculated. Maximum energy of received symbols and simplified signal processing are obtained.
CA002044599A 1989-11-15 1990-10-26 Method of determining sampling time points Expired - Lifetime CA2044599C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE8903842-6 1989-11-15
SE8903842A SE465005B (en) 1989-11-15 1989-11-15 PROCEDURE TO DETERMINE SAMPLE TIME
PCT/SE1990/000697 WO1991007831A1 (en) 1989-11-15 1990-10-26 A method of determining sampling time points

Publications (2)

Publication Number Publication Date
CA2044599A1 true CA2044599A1 (en) 1991-05-16
CA2044599C CA2044599C (en) 2001-01-09

Family

ID=20377491

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002044599A Expired - Lifetime CA2044599C (en) 1989-11-15 1990-10-26 Method of determining sampling time points

Country Status (7)

Country Link
JP (1) JP2994748B2 (en)
KR (1) KR970007612B1 (en)
AU (1) AU628238B2 (en)
CA (1) CA2044599C (en)
NZ (1) NZ235749A (en)
SE (1) SE465005B (en)
WO (1) WO1991007831A1 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2113919A1 (en) * 1992-06-18 1993-12-23 Norio Yamaguchi Maximum likelihood sequence estimator and maximum likelihood sequence estimation method
US5465412A (en) * 1993-05-19 1995-11-07 Motorola, Inc. Apparatus and method for determining a point in time for detecting a sampled signal in a receiver
US5365549A (en) * 1993-05-24 1994-11-15 Motorola, Inc. Complex signal correlator and method therefor
FR2726711B1 (en) * 1994-11-07 1996-12-20 Alcatel Telspace METHOD OF DETECTION OF REFERENCE SYMBOLS FOR RECEIVERS OF DIGITAL DATA
EP0909520A2 (en) * 1996-06-28 1999-04-21 Harris Corporation Improvements in or relating to a method and apparatus for determining symbol timing in a wireless communications system, also using a reusable control channel, and reducing power
US6023477A (en) * 1996-12-18 2000-02-08 Ericsson Inc. System and method of time and frequency synchronization in a radiocommunication system
FR2773029B1 (en) * 1997-12-23 2000-02-04 Telecommunications Sa METHOD FOR SYNCHRONIZING A RECEIVER ON PACKET TRANSMITTED DIGITAL DATA
US6453156B1 (en) 1998-09-24 2002-09-17 Ericsson Inc. Scanning radio receiver for a wireless communication system
EP1094631B1 (en) 1999-10-20 2006-09-27 Koninklijke Philips Electronics N.V. Quest for the optimum sampling point in a TDMA packet transmission system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4823382A (en) * 1986-10-01 1989-04-18 Racal Data Communications Inc. Echo canceller with dynamically positioned adaptive filter taps
US4768208A (en) * 1987-03-09 1988-08-30 Motorola, Inc. Mid-symbol sampling timing estimator

Also Published As

Publication number Publication date
JP2994748B2 (en) 1999-12-27
SE8903842L (en) 1991-05-16
KR920702119A (en) 1992-08-12
AU6741590A (en) 1991-06-13
JPH04503143A (en) 1992-06-04
AU628238B2 (en) 1992-09-10
SE465005B (en) 1991-07-08
WO1991007831A1 (en) 1991-05-30
SE8903842D0 (en) 1989-11-15
NZ235749A (en) 1993-01-27
CA2044599C (en) 2001-01-09
KR970007612B1 (en) 1997-05-13

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Legal Events

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