Robust sensing of dvb-t/h transmissions in the presence of frequency offsets
Номер патента: EP2430808A1
Опубликовано: 21-03-2012
Автор(ы): Vasanth Gaddam
Принадлежит: KONINKLIJKE PHILIPS ELECTRONICS NV
Опубликовано: 21-03-2012
Автор(ы): Vasanth Gaddam
Принадлежит: KONINKLIJKE PHILIPS ELECTRONICS NV
Реферат: A method and system is provided for detecting the presence of a DVB (digital video broadcasting) transmission with frequency offsets. The method includes receiving an RF (radio frequency) signal in a selected channel (901); creating samples from the received RF signal (902); estimating a frequency offset of the samples (903); correcting the samples with the estimated frequency offset (904); correlating the corrected samples with a reference signal (905); and comparing a correlation result with a threshold value (906). The frequency offset estimation includes selecting a set of three or more pilots that are boosted continual pilots transmitted at fixed sub-carrier locations in all symbols (1001); transforming the received samples to the frequency domain (1002); determining locations of maxima in the transformed samples, the maxima corresponding to the pilots in the set (1003); and comparing the determined locations with the expected pilot locations in the set (1004).
Robust sensing of dvb-t/h transmissions in the presence of frequency offsets
Номер патента: WO2010131139A1. Автор: Vasanth Gaddam. Владелец: KONINKLIJKE PHILIPS ELECTRONICS, N.V.. Дата публикации: 2010-11-18.