Adaptive transmitter/receiver

An adaptive transceiver device of a CDMA (Code Division Multiple Access) system characterized by comprising:

• path search means for calculating path level information and path delay time information from antenna reception signals;
• M (M is a positive integer) adaptive reception units for receiving N (N is a positive integer) antenna reception signals, forming reception directivity patterns each having a gain in the direction of a desired wave signal every path delay time, receiving the desired wave signals, and suppressing interference wave signals;
• reception antenna weight selection means for selecting reception antenna weights for L (L is an integer equal to or smaller than M) transmission paths among M reception antenna weights by using the path level information;
• L transmission antenna weight control units for determining transmission antenna weights for forming transmission directivity patterns by using outputs from the reception antenna weight selection means;
• and
• an adaptive transmission unit for forming the transmission directivity pattern having a gain in a user direction by using the transmission antenna weight which is an output from the transmission antenna weight control unit and outputting N combining antenna transmission signals for transmitting the desired wave signal, the adaptive transmission unit having L adaptive transmission sub-blocks which receive L transmission antenna weights which are outputs from the L transmission antenna weight control units and a transmission signal and which output N antenna transmission signals for forming a directivity pattern having a gain in a user direction on the basis of the transmission antenna weights and transmitting a desired wave signal.