Abstract: An apparatus and method for performing channel estimation in an OFDM (Orthogonal Frequency Division Multiplexing) system using multiple antennas, and a method for performing channel estimation using received sub-carriers in an OFDM system for receiving a sub-carrier having a training symbol and another sub-carrier having no training symbol comprising the steps of: a) differently setting a weight associated with a reliability of the sub-carrier having the training symbol and a weight associated with a reliability of the sub-carrier having no training symbol, b) measuring channel estimation errors associated with individual received sub-carriers, and c) performing channel estimation using the measured channel estimation errors and the set weights.

Abstract: A processor on which a software-based interleaver is run performs interleaver generation, which is split into two parts to reduce the overhead time of interleaver changing. First, preprocessing prepares seed variables, requiring a small memory. Second, on-the-fly address generation generates interleaved addresses through simple adding and subtracting operations using the seed variables.

Abstract: A processor on which software interleaver is run is provided. The interleaver generation is split into two parts to reduce the overhead time of interleaver changing. First preprocessing prepares seed variables requiring a small memory. Second on-the-fly address generation generates interleaved address through simple adding and subtracting operations using the seed variables.

Abstract: An apparatus and method for performing channel estimation in an OFDM (Orthogonal Frequency Division Multiplexing) system using multiple antennas, and a method for performing channel estimation using received sub-carriers in an OFDM system for receiving a sub-carrier having a training symbol and another sub-carrier having no training symbol comprising the steps of: a) differently setting a weight associated with a reliability of the sub-carrier having the training symbol and a weight associated with a reliability of the sub-carrier having no training symbol, b) measuring channel estimation errors associated with individual received sub-carriers, and c) performing channel estimation using the measured channel estimation errors and the set weights.