Patent ID: 7010023

Claim:
A path search circuit in a CDMA cellular system, comprising: an antenna having a plurality of elements; a plurality of radio receivers for frequency-converting radio frequency signals received respectively by the elements of the antenna into respective baseband signals; a plurality of A/D converters for converting the respective baseband signals into digital data; a plurality of correlation processors for calculating cross correlations between the digital data converted from the baseband signals and a signal known at a reception side, and outputting respective correlation signals; a weighted-mean-value processor for weighting and adding the correlation signals output from said correlation processors based on indicated weighting coefficients, storing the weighted and added correlation signals as interim calculated results, and averaging a plurality of interim calculated results stored over a predetermined amount of time; a correlation peak detector for detecting at least one peak from the averaged interim calculated results output as delay profiles from said weighted-mean-value processor, and outputting a reception level and reception timing corresponding to the detected peak as a reception level and reception timing of a reception path; and a weighting controller for controlling said weighting coefficients to determine a directivity of said antenna and generating a plurality of weighting coefficients to establish a plurality of general antenna directivities for dividing a sector where a mobile terminal with which to communicate is present, when a communication session starts.