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A method of communication between a base station with at least a mobile unit communication apparatus, a base station and a mobile unit communication apparatus employing the method are disclosed. The base station has a plurality of antennas for the antenna diversity. Transmission data is spectrum-spr

A method of communication between a base station with at least a mobile unit communication apparatus, a base station and a mobile unit communication apparatus employing the method are disclosed. The base station has a plurality of antennas for the antenna diversity. Transmission data is spectrum-spread with a pn code for a target mobile unit communication apparatus and a pilot signal is also spectrum-spread with a pn code every antenna, which are frequency-multiplexed. A mobile unit de-spectrum-spreads the pilot signal with one of pn codes selected, which corresponds the transmitting antenna. The pilot signal and data may be time-division-multiplexed in a time slot. Data of the used antenna is transmitted by the base station by a position of null data in the time slot, or differentially coded which is detected by a null data detection circuit or by the delayed detection. Data of the antenna used may be transmitted by a mobile unit communication apparatus. The antenna transmitting the data may be detected at the mobile unit communication apparatus by detecting an error from error check codes. In the downward time slot, the spectrum-spread pilot signal is frequency-multiplexed with spectrum-spread data and in the upward time slot, the spectrum-spread pilot signal is time-division-multiplexed with the spectrum-spread data.

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[ What is claimed is:] [1.] 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 diver

[ What is claimed is:] [1.] 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.