Patent ID: 7539263
Filing Date: 2009-05-26
Classification: H04L

Abstract:
1. A method for transmitting preamble sequences from a transmitter in an orthogonal frequency division multiplexing (OFDM) communication system using multiple transmit antennas, comprising the steps of: segmenting a first base sequence with a first preset length into a first preset number of second sequences; applying different time offsets to the second sequences and generating subsequences of a first preamble sequence corresponding to the number of second sequences; segmenting a second base sequence with a second preset length into a second preset number of third sequences; applying different time offsets to the third sequences and generating subsequences of a second preamble sequence corresponding to the number of third sequences; selecting a specific subsequence from the subsequences of the first preamble sequence and transmitting the specific subsequence through a specific transmit antenna of the multiple transmit antennas in a first preset time interval; and selecting a third preset number of subsequences from the subsequences of the second preamble sequence, and mapping and transmitting the selected subsequences of the second preamble sequence to the multiple transmit antennas in a second preset time interval.