SE8903842L - PROCEDURE TO DETERMINE SAMPLE TIME - Google Patents
PROCEDURE TO DETERMINE SAMPLE TIMEInfo
- Publication number
- SE8903842L SE8903842L SE8903842A SE8903842A SE8903842L SE 8903842 L SE8903842 L SE 8903842L SE 8903842 A SE8903842 A SE 8903842A SE 8903842 A SE8903842 A SE 8903842A SE 8903842 L SE8903842 L SE 8903842L
- Authority
- SE
- Sweden
- Prior art keywords
- sampling time
- time point
- channel
- energy
- sequences
- Prior art date
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
- 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
-
- 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.
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 |
PCT/SE1990/000697 WO1991007831A1 (en) | 1989-11-15 | 1990-10-26 | A method of determining sampling time points |
KR1019910700725A KR970007612B1 (en) | 1989-11-15 | 1990-10-26 | Method of determining sampling time points |
CA002044599A CA2044599C (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 |
AU67415/90A AU628238B2 (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 SE8903842D0 (en) | 1989-11-15 |
SE8903842L true 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)
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 |
WO1998000992A2 (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 |
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)
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 |
-
1989
- 1989-11-15 SE SE8903842A patent/SE465005B/en not_active IP Right Cessation
-
1990
- 1990-10-18 NZ NZ235749A patent/NZ235749A/en unknown
- 1990-10-26 AU AU67415/90A patent/AU628238B2/en not_active Ceased
- 1990-10-26 JP JP3500301A patent/JP2994748B2/en not_active Expired - Lifetime
- 1990-10-26 WO PCT/SE1990/000697 patent/WO1991007831A1/en active Application Filing
- 1990-10-26 CA CA002044599A patent/CA2044599C/en not_active Expired - Lifetime
- 1990-10-26 KR KR1019910700725A patent/KR970007612B1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
CA2044599C (en) | 2001-01-09 |
AU628238B2 (en) | 1992-09-10 |
SE465005B (en) | 1991-07-08 |
JP2994748B2 (en) | 1999-12-27 |
NZ235749A (en) | 1993-01-27 |
JPH04503143A (en) | 1992-06-04 |
WO1991007831A1 (en) | 1991-05-30 |
KR920702119A (en) | 1992-08-12 |
KR970007612B1 (en) | 1997-05-13 |
SE8903842D0 (en) | 1989-11-15 |
CA2044599A1 (en) | 1991-05-16 |
AU6741590A (en) | 1991-06-13 |
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