TWI268674B - OFDM system having cyclic prefix length detection - Google Patents
OFDM system having cyclic prefix length detectionInfo
- Publication number
- TWI268674B TWI268674B TW094127777A TW94127777A TWI268674B TW I268674 B TWI268674 B TW I268674B TW 094127777 A TW094127777 A TW 094127777A TW 94127777 A TW94127777 A TW 94127777A TW I268674 B TWI268674 B TW I268674B
- Authority
- TW
- Taiwan
- Prior art keywords
- length
- ofdm
- ofdm system
- length detection
- cyclic prefix
- Prior art date
Links
Landscapes
- Synchronisation In Digital Transmission Systems (AREA)
Abstract
This invention relates to an orthogonal division frequency modulation (OFDM) system having cyclic-prefix (CP) length detection. According to the invention, a delay-correlator with fixed length is used to takes the autocorrelation on one OFDM symbol with unknown CP length, and the CP length and obtains synchronization of OFDM symbol are decided by means of the correlativity. Therefore, using the CP length detector with low complexity, the OFDM system of the invention can fast and accurately detect the CP length, and efficiently utilizes bandwidth on the presupposition without inter-symbol interference.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW094127777A TWI268674B (en) | 2005-08-15 | 2005-08-15 | OFDM system having cyclic prefix length detection |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW094127777A TWI268674B (en) | 2005-08-15 | 2005-08-15 | OFDM system having cyclic prefix length detection |
Publications (2)
Publication Number | Publication Date |
---|---|
TWI268674B true TWI268674B (en) | 2006-12-11 |
TW200707953A TW200707953A (en) | 2007-02-16 |
Family
ID=57910855
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW094127777A TWI268674B (en) | 2005-08-15 | 2005-08-15 | OFDM system having cyclic prefix length detection |
Country Status (1)
Country | Link |
---|---|
TW (1) | TWI268674B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8718030B2 (en) | 2007-03-26 | 2014-05-06 | Qualcomm Incorporated | Methods and apparatus for performing channel tree operations |
US9723529B2 (en) | 2007-01-26 | 2017-08-01 | Wi-Lan Inc. | Multiple network access system and method |
US10516713B2 (en) | 2007-01-12 | 2019-12-24 | Wi-Lan Inc. | Convergence sublayer for use in a wireless broadcasting system |
-
2005
- 2005-08-15 TW TW094127777A patent/TWI268674B/en not_active IP Right Cessation
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10516713B2 (en) | 2007-01-12 | 2019-12-24 | Wi-Lan Inc. | Convergence sublayer for use in a wireless broadcasting system |
US11057449B2 (en) | 2007-01-12 | 2021-07-06 | Wi-Lan Inc. | Convergence sublayer for use in a wireless broadcasting system |
US11621990B2 (en) | 2007-01-12 | 2023-04-04 | Wi-Lan Inc. | Convergence sublayer for use in a wireless broadcasting system |
US9723529B2 (en) | 2007-01-26 | 2017-08-01 | Wi-Lan Inc. | Multiple network access system and method |
US10231161B2 (en) | 2007-01-26 | 2019-03-12 | Wi-Lan Inc. | Multiple network access system and method |
US11134426B2 (en) | 2007-01-26 | 2021-09-28 | Wi-Lan Inc. | Multiple network access system and method |
US8718030B2 (en) | 2007-03-26 | 2014-05-06 | Qualcomm Incorporated | Methods and apparatus for performing channel tree operations |
Also Published As
Publication number | Publication date |
---|---|
TW200707953A (en) | 2007-02-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
TWI403113B (en) | A wireless transmit/receive unit and method of performing cell search in an orthogonal frequency division multiple access based system / a wireless communication system | |
MX2017005831A (en) | Preamble based ofdm fine frequency offset estimation. | |
MX2012001873A (en) | Signal resource determination method. | |
EP2329630B1 (en) | OFDM frame synchronisation method and system | |
GB2432497A (en) | Multicarrier receivers and methods for detecting cyclic prefixes having | |
DE60135193D1 (en) | Symbol clock synchronization in multi-carrier receivers | |
WO2005112320A3 (en) | Orthogonal frequency division multiplex ofdm packet detect unit, method of detecting an ofdm packet | |
RU2009144141A (en) | IMPROVED SYNCHRONIZATION OF LINEAR-FREQUENCY-MODULATED SEQUENCES | |
CN107438040B (en) | Leading symbol detection and analysis device and method | |
JP2004282759A (en) | Synchronization method and apparatus for initial frequency in ofdm system | |
TW200707994A (en) | Orthogonal frequency division multiplexing system with PN sequence | |
US9210002B2 (en) | Transmitter, receiver, and controlling method thereof | |
ATE476816T1 (en) | CARRIER SYNCHRONIZATION IN OFDM | |
TWI268674B (en) | OFDM system having cyclic prefix length detection | |
WO2010061993A1 (en) | Apparatus and method for acquaring frame synchronization | |
JP2010093523A (en) | Ofdm demodulator | |
US7561560B2 (en) | Symbol timing synchronization system for orthogonal frequency division multiplexing systems | |
KR101421305B1 (en) | ractional frequency offset estimation method and receiver using the same | |
Du et al. | Blind carrier frequency offset estimation for coherent optical OFDM systems | |
KR100754948B1 (en) | apparatus for synchronizing of OFDM signal | |
KR101832471B1 (en) | Method for generating preamble, and method and apparatus for detecting frame boundary | |
KR100822885B1 (en) | Method for setting up frame sync in orthogonal frequency division multiplexing system, unit using the method, and apparatus having the unit | |
Kongara et al. | Implementation of PCC OFDM on a software defined radio platform | |
JP2008259063A (en) | Synchronization establishing method and orthogonal frequency-division multiplexing and modulating method, and communication device | |
KR100887928B1 (en) | Method for searching synchronization symbol of wireless usb system |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
MM4A | Annulment or lapse of patent due to non-payment of fees |