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AssigneeThe Board of Trustees of the Leland Stanford Junior University
InventorsJacky Chow, John M. Cioffi
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A method for optimizing a set of equalizer parameters of an equalizer to be used to equalize a multicarrier data signal that has been transmitted through a distorting channel, comprised of the steps of initializing the parameters, repeatedly sending a training sequence through the channel to the receiver, using the equalizer parameters, the received sequence, and a local replica of the training sequence to update a set of channel target response parameters, windowing the channel target response parameters, using the channel target response parameters, the received sequence and the local replica to update the equalizer parameters, and windowing the equalizer parameters. This training process is repeated until a predetermined convergence condition is detected.
In a data communication system comprising a multicarrier transmitter which encodes and modulates input data onto a plurality of carriers, generates n samples of a transmit signal, and then appends to the front of the block of N samples a cyclic prefix of L samples before transmitting all (N+L) samples, a channel which severely distorts signals input to it by the transmitter, and a multicarrier receiver which includes an equalizer which partially equalizes the distorted signals it receives from the channel, and means for removing the L samples of the cyclic prefix, and then demodulating and decoding the remaining N samples, a method of calculating a set of M windowed time-domain equalizer parameters w.sub.w (D) of said equalizer, wherein L, M and N are positive integers, said method comprising the steps of:
In a data transmission system including a transmitter, a distorting channel and a receiver, said receiver including an equalizer which processes a received signal before said signal is input to a demodulator, wherein said data transmission system requires that the impulse response of the received signal be shortened to L samples in the equalizer, a method of calculating a set of M windowed time-domain equalizer parameters w.sub.w (D) of said equalizer comprising the steps of:
In a data storage system including a write mechanism, a distorting storage medium, a read mechanism, and a receiver which processes a received signal read from the storage medium by the read mechanism, said receiver including a decoder and an equalizer which processes said received signal before said signal is input to the decoder, wherein said data storage system requires that the impulse response of the received signal be shortened to L samples in the equalizer, a method of calculating a set of M windowed time-domain equalizer parameters w.sub.w (D) of said equalizer comprising the steps of:
Dependencies are inferred from the claim text.