APPARATUS FOR FORMING FORWARD BEAM USING MULTI-PATH INFORMATION FEEDBACK AND METHOD THEREFOR

摘要

PURPOSE: An apparatus for forming a forward beam using a multi-path information feedback and a method therefor are provided to reduce feedback data quantity and simplify a structure of a terminal by calculating an array response vector in a reverse direction in a base station, and receiving the strength of a common pilot signal and receiving only a fading characteristic of a forward channel in the terminal. CONSTITUTION: A searcher(203) matches and filters provided baseband digital data and detects a reverse multi-path. An arrival angle range measurer(204) estimates a plurality of angle regions which direct the multi-path direction detected in the searcher(203). An array receiver and demodulator(205) performs a space filtering of data received through an array antenna, and demodulates data fed back from a terminal. A forward beam forming weight value controller(207) calculates a plurality of transmission beam forming weight values which direct the angle regions estimated in the arrival angle range measurer(204), and selects one beam forming weight value for transmitting a data channel using feedback information of the terminal received from the array receiver and demodulator(205). A forward beam former and modulator(206) transmits the data channel using the beam forming weight value selected in the forward beam forming weight value controller(207), and transmits a control channel for grasping a forward channel characteristic successively using a plurality of transmission beam forming weight values.