Patent ID: 7443921

Claim:
A mobile communication apparatus in a mobile communication system having plural base stations in which communication of the same data is performed using a multi-carrier modulation method between the base stations and a mobile station at the same frequency and at the same time, the mobile communication apparatus having a phase adjustment means that can set a phase difference to sub-carriers at the plural base stations at a transmission time, the phase difference varying from one sub-carrier to another, wherein a point where the intensity of electric power of reception signals from the plural base stations is approximately equal is specified, and a compensation value, 2π(d 2 −d 1 )/λ i , of a propagation phase difference based on a difference of distance, d 2 −d 1 , is added beforehand to a phase difference between a sub-carrier f i transmitted from a base station A and a sub-carrier f i transmitted from a base station B, wherein i=1˜N; N is the number of sub-carriers, λ i is a propagation wavelength of i-th sub-carrier, d 1 represents the distance between the base station A of said plural base stations and said specified point, and d 2 represents the distance between the base station B of said plural base stations and said specified point.