Identification method of an OFDM signal

摘要

An OFDM signal identification method in a received signal, wherein the received signal is sampled and cut off into blocks of P samples, each block being subjected to an inverse Fourier transform to obtain a plurality of symbols at a plurality of frequencies. For each frequency of the plurality, the kurtosis of the set of symbols thus obtained at this frequency is calculated, and then it is determined whether the kurtosis has a periodicity in frequency domain from kurtosis values calculated for the frequencies of the plurality, and the presence of an OFDM signal in the received signal is identified if the kurtosis has such a periodicity.

主权项

1. An OFDM signal identification method for identifying an OFDM signal in a received signal, implemented by a terminal, comprising:
sampling and cutting off the received signal into blocks of P samples, P being an integer; subjecting each block of P samples to a Fourier transform to obtain a plurality of symbols at each of a plurality of frequencies; calculating, for each frequency of the plurality of frequencies, kurtosis of a set of symbols obtained for a current frequency of the plurality of frequencies; determining whether the kurtosis calculated over the plurality of frequencies has a periodicity in a frequency domain; and identifying presence of an OFDM signal in the received signal when the kurtosis has such a periodicity.