SE8903842D0 - PROCEDURE TO DETERMINE SAMPLE TIME - Google Patents

PROCEDURE TO DETERMINE SAMPLE TIME

Info

Publication number
SE8903842D0
SE8903842D0 SE8903842A SE8903842A SE8903842D0 SE 8903842 D0 SE8903842 D0 SE 8903842D0 SE 8903842 A SE8903842 A SE 8903842A SE 8903842 A SE8903842 A SE 8903842A SE 8903842 D0 SE8903842 D0 SE 8903842D0
Authority
SE
Sweden
Prior art keywords
sampling time
time point
channel
energy
sequences
Prior art date
Application number
SE8903842A
Other languages
Swedish (sv)
Other versions
SE8903842L (en
SE465005B (en
Inventor
L G Larsson
Original Assignee
Ericsson Telefon Ab L M
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 Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Priority to SE8903842A priority Critical patent/SE465005B/en
Publication of SE8903842D0 publication Critical patent/SE8903842D0/en
Priority to NZ235749A priority patent/NZ235749A/en
Priority to KR1019910700725A priority patent/KR970007612B1/en
Priority to JP3500301A priority patent/JP2994748B2/en
Priority to CA002044599A priority patent/CA2044599C/en
Priority to AU67415/90A priority patent/AU628238B2/en
Priority to PCT/SE1990/000697 priority patent/WO1991007831A1/en
Publication of SE8903842L publication Critical patent/SE8903842L/en
Publication of SE465005B publication Critical patent/SE465005B/en
Priority to US07/978,167 priority patent/US5228057A/en

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 (C<2>) is obtained. The impulse response is sampled (Ts) 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 (C<2> 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.
SE8903842A 1989-11-15 1989-11-15 PROCEDURE TO DETERMINE SAMPLE TIME SE465005B (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
SE8903842A SE465005B (en) 1989-11-15 1989-11-15 PROCEDURE TO DETERMINE SAMPLE TIME
NZ235749A NZ235749A (en) 1989-11-15 1990-10-18 Correlation of synchronisation sequence determines receiver sampling time
KR1019910700725A KR970007612B1 (en) 1989-11-15 1990-10-26 Method of determining sampling time points
JP3500301A JP2994748B2 (en) 1989-11-15 1990-10-26 How to determine the sampling time point
CA002044599A CA2044599C (en) 1989-11-15 1990-10-26 Method of determining sampling time points
AU67415/90A AU628238B2 (en) 1989-11-15 1990-10-26 A method of determining sampling time points
PCT/SE1990/000697 WO1991007831A1 (en) 1989-11-15 1990-10-26 A method of determining sampling time points
US07/978,167 US5228057A (en) 1989-11-15 1992-11-17 Method of determining sampling time points

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8903842A SE465005B (en) 1989-11-15 1989-11-15 PROCEDURE TO DETERMINE SAMPLE TIME

Publications (3)

Publication Number Publication Date
SE8903842D0 true SE8903842D0 (en) 1989-11-15
SE8903842L SE8903842L (en) 1991-05-16
SE465005B SE465005B (en) 1991-07-08

Family

ID=20377491

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8903842A SE465005B (en) 1989-11-15 1989-11-15 PROCEDURE TO DETERMINE SAMPLE TIME

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
WO1993026106A1 (en) * 1992-06-18 1993-12-23 Oki Electric Industry Co., Ltd. Maximum likelihood sequence estimating device and method therefor
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
CA2259647A1 (en) * 1996-06-28 1998-01-08 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
DE60030932T2 (en) * 1999-10-20 2007-06-21 Koninklijke Philips Electronics N.V. Search for the optimal sampling time 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
KR970007612B1 (en) 1997-05-13
JP2994748B2 (en) 1999-12-27
SE8903842L (en) 1991-05-16
JPH04503143A (en) 1992-06-04
NZ235749A (en) 1993-01-27
CA2044599A1 (en) 1991-05-16
AU6741590A (en) 1991-06-13
SE465005B (en) 1991-07-08
CA2044599C (en) 2001-01-09
AU628238B2 (en) 1992-09-10
WO1991007831A1 (en) 1991-05-30
KR920702119A (en) 1992-08-12

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