| 摘要 |
The present invention relates to a method for detecting an FM wireless microphone signal comprising the steps of obtaining an autocorrelation function for a received signal; calculating the square of a fast Fourier transform (FFT) absolute value for the autocorrelation function result; adding calculation results at the same frequency position; and searching for the maximum of the added value, comparing the searched maximum value with a predefined threshold value and determining whether a signal exists. According to the present invention, a threshold value defined in the IEEE 802.22 WRAN is satisfied, thereby reducing damage to a primary user on a white space, and, at the same time, enabling multiple wireless devices to share and use a frequency band. Therefore, a frequency band, which is a limited resource, can be efficiently used. |
