Patent ID: 6069884
Filing Date: 2000-05-30
Classification: H04B

Abstract:
A method of communication between a base station and at least a mobile unit communication apparatus through the code division multiple accessing, comprising the steps of:in said base station, (a) providing a plurality of antennas to said base station for the antenna diversity communication;(b) spectrum-spreading data to be transmitted to said mobile unit communication apparatus with a first pseudonoise code assigned to said mobile unit communication apparatus;(c) spectrum-spreading a pilot signal with second pseudonoise codes respectively assigned to a plurality of said antennas to generate spectrum-spread pilot signals, said first pseudonoise code being different from each of said second pseudonoise codes;(d) multiplexing one of said spectrum-spread pilot signals corresponding to one of a plurality of said antennas to be used with said spectrum-spread data; and(e) transmitting said multiplexed spectrum-spread pilot signal and spectrum-spread data as a radio wave signal through said one of a plurality of said antennas every downward time slot;in said mobile unit communication apparatus, (f) receiving said radio wave signal;(g) supplying one of third pseudonoise codes corresponding to said second pseudonoise codes;(h) de-spectrum-spreading said received radio wave signals with said one of third pseudonoise codes to output a pilot signal correlation result;(i) de-spectrum-spreading said received radio wave signals with a fourth pseudonoise code corresponding to said first pseudonoise code to provide data correlation results;(j) RAKE-combining said data correlation results in accordance with said pilot signal correlation result to output a RAKE-combined signal;(k) synchronously-detecting said RAKE-combined signal to output a combined signal; and(l) controlling supplying said one of said third pseudonoise codes in accordance with said combined signal.