| US 7,539,237 B2 | ||
| Fast locking mechanism for channelized ultrawide-band communications | ||
| Larry W. Fullerton, Huntsville, Ala. (US) | ||
| Assigned to Alereon, Inc., Austin, Tex. (US) | ||
| Filed on Oct. 25, 2006, as Appl. No. 11/586,066. | ||
| Application 11/586066 is a continuation of application No. 10/411090, filed on Apr. 11, 2003, granted, now 7,231,611. | ||
| Application 10/411090 is a continuation of application No. 09/158570, filed on Sep. 22, 1998, abandoned. | ||
| Application 09/158570 is a continuation of application No. 08/761602, filed on Dec. 06, 1996, granted, now 5,832,035. | ||
| Prior Publication US 2007/0153873 A1, Jul. 05, 2007 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. H04K 1/00 (2006.01) | ||
| U.S. Cl. 375—149 [375/150; 375/355] | 7 Claims |
| 1. A method for acquisition and lock of an ultra wideband signal, comprising the steps of:
sliding a periodic timing signal using an adjustable time base;
producing a decode signal using said periodic timing signal, wherein successive decode signals are coded by successive chips
of a code having a predetermined modulo length;
cross correlating a received ultra wideband signal with said decode signal to output a baseband signal;
integrating T samples of said baseband signal to output an integration result, where T is an integer;
outputting a channel coincidence signal based on a threshold value and said integration result;
determining whether channel coincidence has occurred using said channel coincidence signal, and
if channel coincidence is detected, stopping said periodic timing signal from sliding, otherwise,
if channel coincidence was not detected, adjusting said periodic timing signal and repeating the steps of sliding, producing,
cross correlating, integrating and determining for successive T pulses of said periodic timing signal until-channel coincidence
is detected.
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