METHOD FOR COMPENSATING INTRA-SYMBOL TIME VARIATION IN MULTICARRIER RECEPTION, APPARATUS FOR COMPENSATING INTRA-SYMBOL TIME VARIATION IN MULTICARRIER RECEIVING APPARATUS, AND MULTICARRIER RECEIVING APPARATUS INCLUDING THE SAME

摘要

PROBLEM TO BE SOLVED: To compensate an intra-symbol time variation in a multicarrier receiving apparatus. SOLUTION: As a configuration of an intra-symbol temporal variation estimator of 3.B, a digital complex signal outputted from an orthogonal demodulation unit 1 is inputted to a delay circuit 111, a phase variation estimation unit 112, and a short block amplitude variation estimation unit 113. A delay signal resulting from delaying the digital complex signal by an effective symbol length (Tf) is outputted from the delay circuit 111 and inputted to the phase variation estimation unit 112. In the phase variation estimation unit 112, a phase variation for each time interval Ta(Taf) is estimated from the digital complex signal outputted from the orthogonal demodulation unit 1 and the delay signal. In the short block amplitude variation estimation unit 113, an amplitude variation for each time interval Ta(Taf) is estimated from the digital complex signal outputted from the orthogonal demodulation unit 1. In a correction factor computation circuit 114, a complex factor for compensating a time variation in a block Tais calculated from the inputted amplitude variation and phase variation, and outputted to a complex multiplier 12. COPYRIGHT: (C)2005,JPO&NCIPI