Patent ID: 7079867

Claim:
A base station device having an antenna array, for receiving forward fading information from a mobile station in a mobile communication system, comprising: a reverse processor for processing a reverse signal received through the antenna array; a forward fading information extraction unit for extracting forward fading information from the received reverse signal; a beam formation controller for generating a weight vector for formation of a transmission beam using the forward fading information and the received reverse signal; and a forward processor having a transmission beam generator for generating a transmission beam for a transmission message based on the weight vector, wherein the forward fading information extraction unit comprises: a forward fading decoder for decoding forward fading information for each path fed back from a mobile station from the received reverse signal of the reverse processor; and a forward fading extractor for extracting a forward fading coefficient from the decoded forward fading information; and wherein if the decoded forward fading information is represented as complex information {β i F a (θ i ) H w , i=1, 2, . . . , M}, the forward fading extractor extracts a complex forward fading coefficient {β i F , i−1, 2, . . . , M} using a weight vector w and an estimated array vector { a (θ i ), i−1, 2, . . . , M} used for formation of the transmission beam.