APPARATUS AND METHOD FOR CHANNEL ESTIMATION IN AN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING CELLULAR COMMUNICATION SYSTEM USING MULTIPLE TRANSMIT ANTENNAS

摘要

The invention relates to an apparatus for channel estimation using preamble signals received from a serving Node B and neighboring Node Bs in a user equipment (UE) in a broadband wireless communication system in which each of the Node Bs transmits a signal through N (≥1) antennas and the UE receives a signal through M (≥1) antennas, comprising a Node B number decider for calculating a maximum number Ns of channel- estimatable Node Bs using a preamble length, a number of antennas in each of the Node Bs, and a number of multiple paths; a multi-cell preamble matrix generator for generating a multi-cell preamble matrix xs by generating a Node B preamble matrix for each of the serving Node B and the neighboring Node Bs and selecting Ns Node B preamble matrices according to reception power among the generated Node B preamble matrices; and a channel estimator for performing the channel estimation using the multi-cell preamble matrix xs and M signals received through the M antennas during a preamble receiving period.