Patent ID: 8165249
Filing Date: 2012-04-24
Classification: H04B,H04L

Abstract:
1. An apparatus for estimating a time offset in a Multiple Input Multiple Output (MIMO) communication system that supports Orthogonal Frequency Division Multiplexing (OFDM) or Orthogonal Frequency Division Multiplexing Access (OFDMA), the apparatus comprising: a preamble linear phase calculator configured to calculate a preamble linear phase by employing a preamble included in a received signal frame of each of a plurality of receiving antennas; a pilot linear phase calculator configured to receive signals transmitted from a plurality of transmitting antennas using different pilot patterns through the plurality of receiving antennas, and calculate a pilot linear phase by employing the pilot patterns of the plurality of transmitting antennas, which are received from the receiving antennas, respectively; and a time offset operator configured to calculate a time offset by employing the calculated preamble linear phase and the calculated pilot linear phase, wherein the preamble linear phase calculator is configured to calculate the preamble linear phase θ wherein, in each segment, p