Patent ID: 8238286

Claim:
A radio base station comprising: a coding part that performs error correction coding for transmission data; a modulation part that modulates coded data; a synchronization signal generating part that generates synchronization data; a multiplexing part that multiplexes modulation data and the synchronization data; a reverse Fourier transform part that subjects multiple data to reverse Fourier transform; and a cyclic prefix(CP) adding part that adds a guard interval to a reverse Fourier signal, wherein the radio base station further includes a polarity inverting part that performs polarity inversion for some of CP added data, the synchronization data subjected to reverse Fourier transform contains a pattern of repeated SYNC's the length of each of which is one-Nth, wherein N is a positive integer of Fast Fourier Transform size, wherein FFT size is a power of two, the CP adding part adds to the beginning of the guard interval, the last M/N SYNC' repetition of the pattern of repeated Sync's, where M is a positive integer and less than N the polarity inverting part performs polarity inversion in units of the repeated SYNC's.