Pulse or digital communications – Receivers
Reexamination Certificate
2006-11-21
2006-11-21
Ghebretinsae, Temesghen (Department: 2611)
Pulse or digital communications
Receivers
Reexamination Certificate
active
07139331
ABSTRACT:
Characterizing channel response in a single upstream burst using redundant information from training tones (TTs). The invention is operable to utilize inserted TTs, contained within a transmitted data frame, to provide for an improved estimate of a communication channel's actual response and an improved estimate of the noise of the communication channel. The invention determines a maximum allowable delay spread of the many communication paths within a multi-path communication channel. Using the redundant TTs information, then a portion of the finite impulse response of the communication channel, within the time domain, may be zeroed, thereby providing a much improved channel estimate and noise estimate. Using the redundant TTs, less noise is introduced onto the data tones (DTs) within a data frame. The present invention is also able to identify those portions of the TTs that are attributable to the actual channel and those that are attributable to the channel's noise.
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Garlick & Harrison & Markison
Ghebretinsae Temesghen
Short Shayne X.
Torres Juan Alberto
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