Robust sensing of DVB-T/H transmissions
AssigneeKoninklijke Philips N.V.
InventorsMonisha Ghosh, Vasanth Gaddam
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Abstract
A method and system is provided for detecting the presence of a DVB (digital video broadcasting) transmission. The method includes receiving an RF (radio frequency) signal in a selected channel (1101); creating signal samples from the received RF signal (1102); creating averaged samples from the signal samples, each averaged sample being an average of a predetermined number of signal samples that are separated by a minimum pilot pattern repetition period from one to the next signal sample (1103); correlating the averaged samples with a reference sequence (1104); and comparing a correlation result with a threshold correlation value (1105).
Claims13
A method for detecting the presence of a DVB (digital video broadcasting) transmission, comprising:
- receiving an RF (radio frequency) signal in a selected channel;
- creating signal samples from the received signal;
- creating averaged samples from the signal samples, each of the averaged samples being an average of a predetermined number of signal samples that are separated by a minimum pilot pattern repetition period from one to the next signal sample associated with the DVB transmission to be detected;
- correlating the averaged samples with a reference sequence stored in a memory, the reference sequence being a time domain sequence based on pilots associated with the DVB transmission to be detected;
- and
- comparing an output of the correlating a correlation result with a threshold correlation value to determine the presence of the DVB transmission.
A system for detecting the presence of a DVB (digital video broadcasting) transmission, comprising:
- an RF (radio frequency) front-end module for receiving an RF signal;
- a sampling module for creating signal samples from the received RF signal;
- a buffer for holding the signal samples;
- an accumulating/averaging module for creating averaged samples from the signal samples, each of the averaged samples being an average of a predetermined number of signal samples that are separated by a minimum pilot pattern repetition period from one to the next signal sample associated with the DVB transmission to be detected;
- a memory module for storing a reference sequence, the reference sequence being a time domain sequence based on pilots associated with the DVB transmission to be detected;
- a correlator for correlating the averaged samples with the reference sequence;
- and
- a threshold detection module for comparing a correlation result an output of the correlator with a threshold correlation value.
Dependencies are inferred from the claim text.