| 摘要 |
<p>PROBLEM TO BE SOLVED: To achieve diversity merits without receiving demerits so much by transmitting respective data symbol sets to the respective users of a user group by the form plural mutually different signal sequences which are the linear connection of spreading code sequences belonging to a corresponding code group. SOLUTION: An antenna 1 (25.1) transmits signals (1/21/2) (b1c1+b2c2) and the antenna 2 (25.2) transmits the signals (1/21/2) (b2c1-b1c2). In such a manner, while only two pieces of spreading codes are used, the two codes are used for a data symbol to the user (20.1) and also the two codes are used for the data symbol to the user (20.2) as well. Thus, at the time of using plural transmitter antennas, a system for sufficiently achieving the diversity merits without receiving the demerits in the number of the codes required to be allocated per user so much, is realized.</p> |
