| US 7,539,239 B2 | ||
| Apparatus for rapid PN code acquisition | ||
| Steven T. Barham, Taylorsville, Utah (US); Samuel Kingston, Salt Lake City, Utah (US); Randal R. Sylvester, West Valley, Utah (US); and Ronald Leahy, Salt Lake City, Utah (US) | ||
| Assigned to L-3 Communications Corporation, New York, N.Y. (US) | ||
| Filed on Sep. 20, 2006, as Appl. No. 11/533,509. | ||
| Application 11/533509 is a continuation of application No. 09/620888, filed on Jul. 21, 2000, granted, now 7,126,982. | ||
| Prior Publication US 2007/0014336 A1, Jan. 18, 2007 | ||
| Int. Cl. H04B 1/69 (2006.01); H04B 1/707 (2006.01); H04B 1/713 (2006.01) | ||
| U.S. Cl. 375—150 [375/142; 375/149; 375/145] | 7 Claims |
| 1. A method of acquiring a signal code, the method comprising steps of:
acquiring a signal from a first transceiver at a second transceiver;
as part of the acquisition, correlating the signal with a first code sequence having a first code rate and achieving a timing
lock at said first code rate;
transmitting, in response to the step of correlating the signal with said first code sequence, an acknowledgement from said
second transceiver of the signal to said first transceiver of the signal;
changing, at said first and second transceivers, in response to the step of correlating the signal with the first code sequence,
to a second code sequence having a second code rate that is higher than said first code rate; and
maintaining the timing lock while said first and second multi-rate generators shift to the second code sequence.
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