METHOD AND DEVICE FOR DETECTING PRESENCE OF TELEVISION SIGNALS, EXHIBITING CYCLOSTATIONARY PROPERTIES, EMBEDDED IN NOISE

摘要

A method for detecting the presence of a television sigma embedded in a received signal including the television signal and noise is disclosed. Either first-order or second order cyciostationary property of the signals may be used for their detection. When the first-order cyctuolationary' property is used, the following method is used, the method comprising the steps of upsampling the received signal by a factor oven performing a synchronous averaging of a set of M segments of the up sampled received signal, performing an autocorrelation of the signal; and detecting the presence of peaks in the output of the autocorrelation function. When the second order cyclostationar)' property' of the signal is used, the method comprising the steps of delaying the received signal by a fixed delay (symbol time), multiplying the received signal with the delayed version, looking for a tone (single frequency) in the output.