| US 7,430,242 B2 | ||
| Spectrally constrained impulse shortening filter for a discrete multi-tone receiver | ||
| Gopal Harikumar, Waltham, Mass. (US); and Daniel J. Marchok, Buchanan, Mich. (US) | ||
| Assigned to Tellabs Operations, Inc., Naperville, Ill. (US) | ||
| Filed on Jun. 07, 2007, as Appl. No. 11/759,789. | ||
| Application 11/759789 is a continuation of application No. 10/608329, filed on Jun. 27, 2003, granted, now 7,254,178. | ||
| Application 10/608329 is a continuation of application No. 09/054468, filed on Apr. 03, 1998, granted, now 6,631,175, filed on Oct. 07, 2003. | ||
| Prior Publication US 2007/0230562 A1, Oct. 04, 2007 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. H04L 27/28 (2006.01); H04B 1/10 (2006.01) | ||
| U.S. Cl. 375—260 [375/350] | 14 Claims |
| 1. A spectrally constrained impulse shortening filter for a multiple carrier communication system, the system being configured
to receive a signal and including a channel that has an impulse response, the filter comprising:
an input connected to receive the signal;
a digital structure, coupled to the input, configured to select an impulse response, wherein the digital structure is operable
to (1) measure received noise power spectral density, (2) compute a cost function using the noise power, the cost function
being dependent on the impulse response, (3) reduce the dimensionality of a space over which the cost function is defined
and (4) minimize the cost function.
|