EP 2225844 A2 20100908 - SYNCHRONIZATION IN A BROADCAST OFDM SYSTEM USING TIME DIVISION MULTIPLEXED PILOTS
Title (en)
SYNCHRONIZATION IN A BROADCAST OFDM SYSTEM USING TIME DIVISION MULTIPLEXED PILOTS
Title (de)
SYNCHRONISATION IN EINEM BROADCAST-OFDM-SYSTEM MIT ZEITLICH GEMULTIPLEXTEN PILOTSIGNALEN
Title (fr)
SYNCHRONISATION DANS UN SYSTÈME OFDM DE RADIODIFFUSION UTILISANT DES PILOTES À MULTIPLEXAGE TEMPOREL
Publication
Application
Priority
- US 2008082155 W 20081031
- US 93321307 A 20071031
Abstract (en)
[origin: WO2009059250A2] In an OFDM system, a transmitter broadcasts a first TDM pilot on a first set of subbands followed by a second TDM pilot on a second set of subbands in each frame. The subbands in each set are selected from among N total subbands such that (1) an OFDM symbol for the first TDM pilot contains at least Si identical pilot- 1 sequences of length Li and (2) an OFDM symbol for the second TDM pilot contains at least S2 identical pilot-2 sequences of length L2, where L2 > L1, S1 L1 = N, and S2 L2 = N. The transmitter may also broadcast an FDM pilot. A receiver processes the first TDM pilot to obtain frame timing (e.g., by performing correlation between different pilot- 1 sequences) and further processes the second TDM pilot to obtain symbol timing (e.g., by detecting for the start of a channel impulse response estimate derived from the second TDM pilot).
IPC 8 full level
H04L 5/02 (2006.01); H04L 27/26 (2006.01)
CPC (source: EP US)
H04L 5/0007 (2013.01 - EP); H04L 27/2613 (2013.01 - EP US); H04L 27/2662 (2013.01 - EP US); H04L 5/0048 (2013.01 - EP US); H04L 27/26134 (2021.01 - EP US); H04L 27/2656 (2013.01 - EP)
Citation (search report)
See references of WO 2009059250A2
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA MK RS
DOCDB simple family (publication)
WO 2009059250 A2 20090507; WO 2009059250 A3 20090702; CN 101836410 A 20100915; EP 2225844 A2 20100908; JP 2011502454 A 20110120; KR 20100070377 A 20100625; TW 200935854 A 20090816
DOCDB simple family (application)
US 2008082155 W 20081031; CN 200880112781 A 20081031; EP 08844052 A 20081031; JP 2010532309 A 20081031; KR 20107011220 A 20081031; TW 97142156 A 20081031