Patent ID: 6058318
Filing Date: 2000-05-02
Classification: H01Q

Abstract:
A radio base station in a cellular mobile communication system comprising:a plurality of antenna elements having directivity to respective divided sectors of a cell which is a range predetermined for transmission and reception of signals between the base station and each of mobile stations;a plurality of receivers provided correspondingly to said antenna elements for extracting a desired frequency component from a signal received by said antenna elements directed to a same sector and then frequency-converting the extracted component to a predetermined band;a beam former for forming a desired beam pattern on the basis of the output signals of said receivers directed to each sector, wherein one reference antenna element out of the plurality of antenna elements directed to the same sector is set as a first antenna element, one receiver for frequency-converting the signal received by said first antenna element is set as a first receiver, any antenna element different from said first antenna element is set as a second antenna element, and the receiver for frequency-converting the signal received by said second antenna element is set as a second receiver;phase compensation calculating means for calculating, in response to the outputs of the first and second receivers relative to a specific up-signal, a required phase compensation amount which represents the difference phase amount between the output-signal phase difference of said first and second receivers and the input-signal phase difference of said first and second receivers; andphase compensating means for correcting the phase of the output signal of said second receiver on the basis of the phase compensation amount.