APPARATUS FOR OPERATING FORWARD BEAM FORMATION WEIGHT VALUE IN SPREADING CDMA BTS USING ARRAY ANTENNA, AND SYSTEM FOR FORMING FORWARD BEAM USING THE SAME AND METHOD THEREFOR

摘要

PURPOSE: An apparatus for operating a forward beam formation weight value in a spreading CDMA(Code Division Multiple Access) BTS(Base Transceiver Station) using an array antenna, and a system for forming a forward beam using the same and a method therefor are provided to simply its structure, minimize interference to other terminals, and enhance a power emitted at an angle in which a desired terminal is located by performing beam formation using a response vector instead of channel information received from the terminal. CONSTITUTION: A plurality of normalizers(201) normalize receipt array response vectors in which the transfer function component of a receiving unit is removed, remove fading components, and obtain receipt antenna response vectors. A plurality of antenna response converters(202) convert the receipt antenna response vectors obtained in a plurality of normalizers(201) into transmission antenna response vectors. A plurality of vector outer product arithmetic units(203) receive the transmission antenna response vectors from a plurality of antenna response converters(202) and generate a space correlation matrix to each user using vector outer product. A matrix adder(204) receives the space correlation matrixes from a plurality of vector outer product arithmetic units(203), adds the received space correlation matrixes, and generates a space correlation matrix to all users. An inverse matrix arithmetic unit(205) receives the space correlation matrix to all users from the matrix adder(204) and obtains an inverse matrix. A plurality of matrix multipliers(206) multiply the inverse matrix received from the inverse matrix arithmetic unit(205) and the transmission antenna response vectors received from a plurality of antenna response converters(202), and operate forward beam formation weight values.