Patent ID: 6785328
Filing Date: 2004-08-31
Classification: H04L

Abstract:
A method for adapting a primary impulse shortening filter in a multiple carrier communication system, the method comprising:selecting a first cyclic prefix length for the communication system from a set of candidate lengths, transmitting data having a cyclic prefix of the first selected length to a receiver, computing a first maximum bit rate value in the receiver for the first selected length, sending the first maximum bit rate value to the transmitter, selecting a second cyclic prefix length for the communication system from the set of candidate lengths, transmitting data having a cyclic prefix of the second selected length to a receiver, computing a second maximum bit rate value in the receiver for the second selected length, sending the second maximum bit rate value to the transmitter, comparing the first maximum bit rate value to the second maximum bit rate value, and selecting the cyclic prefix length corresponding to the greater of the first and second maximum bit rate values.