Multicarrier communication using a time domain equalizing filter
First Claim
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1. An apparatus, comprising:
- a receiver configured to receive multi-tone signals, wherein the receiver has a Time Domain Equalizer filter employing an algorithm to shorten a length of an incoming impulse response to equal to or less than a guard period by calculating a minimum mean square error solution in combination with measuring an inter-symbol interference of a channel.
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Abstract
Various methods and apparatus are described that use a filter. A receiver may be configured to receive multi-tone signals. The receiver has a Time Domain Equalizer filter employing an algorithm to shorten a length of an incoming impulse response to equal to or less than a guard period by calculating a minimum mean square error solution in combination with measuring an inter-symbol interference of a channel.
54 Citations
22 Claims
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1. An apparatus, comprising:
a receiver configured to receive multi-tone signals, wherein the receiver has a Time Domain Equalizer filter employing an algorithm to shorten a length of an incoming impulse response to equal to or less than a guard period by calculating a minimum mean square error solution in combination with measuring an inter-symbol interference of a channel. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method, comprising:
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calculating an estimation of a first value for a center delay to shift an impulse response to a beginning of a block of time domain data in a multiple tone signal;
creating a set of values around the first value estimate to shift the impulse response that includes at least the first value for the delay and a second value for the delay;
calculating a first minimum mean square error to determine coefficients of a Time-domain Equalizer algorithm based up the first value for the delay so that the length of the overall impulse response is approximately equal to or smaller than a guard period; and
receiving a measurement of a first value of an inter-symbol interference of a channel after the first minimum mean square error is applied to the multiple tone signal. - View Dependent Claims (9, 10, 11, 12)
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13. A machine-readable medium storing executable instructions to a cause a device to perform operations, comprising:
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calculating an estimation of a first value for a center delay to shift an impulse response to a beginning of a block of time domain data in a multiple tone signal;
creating a set of values around the first value estimate to shift the impulse response that includes at least the first value for the delay and a second value for the delay;
calculating a first minimum mean square error to determine coefficients of a Time-domain Equalizer algorithm based up the first value for the delay so that the length of the overall impulse response is approximately equal to or smaller than a guard period; and
receiving a measurement of a first value of an inter-symbol interference of a channel after the first minimum mean square error is applied to the multiple tone signal. - View Dependent Claims (14, 15, 16, 17)
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18. An apparatus, comprising:
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means for calculating an estimation of a first value for a center delay to shift an impulse response to a beginning of a block of time domain data in a multiple tone signal;
means for creating a set of values around the first value estimate to shift the impulse response that includes at least the first value for the delay and a second value for the delay;
means for calculating a first minimum mean square error to determine coefficients of a Time-domain Equalizer algorithm based up the first value for the delay so that the length of the overall impulse response is approximately equal to or smaller than a guard period; and
means for receiving a measurement of a first value of an inter-symbol interference of a channel after the first minimum mean square error is applied to the multiple tone signal. - View Dependent Claims (19, 20, 21, 22)
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Specification