Search International and National Patent Collections

1. (WO2016053661) FILTERING IDENTIFIER FOR AN OFDM SYSTEM

Pub. No.:    WO/2016/053661    International Application No.:    PCT/US2015/051167
Publication Date: Fri Apr 08 01:59:59 CEST 2016 International Filing Date: Tue Sep 22 01:59:59 CEST 2015
IPC: H04L 27/26
H04L 5/00
H04N 21/2383
H04N 21/438
Applicants: THOMSON LICENSING
Inventors: STEWART, John Sidney
FONTAINE, Loic
PESIN, Anthony
Title: FILTERING IDENTIFIER FOR AN OFDM SYSTEM
Abstract:
A broadcast TV signal is a DVB-T2 based system. A DVB-T2 transmitter checks OFDM symbols before transmission to determine a level of adjacent channel interference (ACI). If the of level of ACI is too high, i.e., above a threshold value, the OFDM symbols are filtered before transmission. Otherwise, the OFDM symbols are transmitted without filtering. A filtering field is added to an LI pre-signaling table of the broadcast DVB-T2 signal to signal a DVB-T2 receiver when the received OFDM symbols have been filtered.