RADIO COMMUNICATION SYSTEM, RADIO RECEIVER AND RADIO COMMUNICATION METHOD

摘要

PROBLEM TO BE SOLVED: To eliminate complication due to the use of different systems in the system of selecting one optimum system from different radio systems, to reduce the influence of frequency selective fading and to perform selection and determination in a low layer without depending on a radio system as much as possible. SOLUTION: The radio receiver applied to the radio communication system for selecting one of two or more kinds of OFDM communication systems and performing radio communication includes: OFDM demodulation parts 5-3(A-Z) for demodulating OFDM signals including a function (hereafter called a high autocorrelation function) highly autocorrelated to a predetermined frequency sub channel received from a radio transmitter; correlation ratio calculation parts 5-4(A-Z) for calculating the correlation value of a received high autocorrelation function and a known high autocorrelation function and calculating a correlation ratio indicating a ratio of the correlation value when there is no time difference and the correlation value when there is a time difference for each OFDM communication system; and a selection device 6-2 for selecting the OFDM communication system of the highest correlation ratio. COPYRIGHT: (C)2011,JPO&INPIT