Patent ID: 8155173
Filing Date: 2012-04-10
Classification: H04L

Abstract:
1. A mobile communication system in which a signal obtained by cyclically shifting a predetermined sequence is used for communication, the system comprising: a transmitting equipment which performs signal processing on a signal for the predetermined sequence in a frequency region, converts the signal into a time region by inverse fast Fourier transform, thereafter cyclically shifts the sequence in the signal converted into the time region by a predetermined amount of shift, and transmits the cyclically shifted signal; and a receiving equipment which computes the value of crosscorrelation between the signal received from the transmitting equipment and the sequence stored in advance, converts the crosscorrelation value into a time region by inverse fast Fourier transform, and detects the sequence used in the transmitting equipment and the amount of the cyclic shift on the basis of the crosscorrelation value in the time region; wherein the rate of sampling of the output from the inverse fast Fourier transform in the receiving equipment is a natural number multiple of the rate of sampling of the output from inverse fast Fourier transform in the transmitting equipment.