| US 7,499,428 B2 | ||
| Method, apparatus, and system for receiving data on a first frequency band and observing a second frequency band | ||
| Thomas B. Wilborn, San Diego, Calif. (US); and Johnny K. John, San Diego, Calif. (US) | ||
| Assigned to QUALCOMM, Incorporated, San Diego, Calif. (US) | ||
| Filed on Mar. 14, 2003, as Appl. No. 10/388,668. | ||
| Claims priority of provisional application 60/424753, filed on Nov. 07, 2002. | ||
| Prior Publication US 2004/0090947 A1, May 13, 2004 | ||
| Int. Cl. H04J 3/00 (2006.01) | ||
| U.S. Cl. 370—330 [370/458; 370/468; 370/478; 455/458; 455/343.2] | 9 Claims |
| 1. A method of signal reception, said method comprising:
during a first time slot, receiving a first burst of data over a first frequency band;
during a second time slot after the first time slot, receiving a second burst of data over the first frequency band;
between the first and second time slots, sampling a signal received over a second frequency band and storing the samples;
powering down at least a portion of an Radio Frequency (RF) receiving circuit for at least a portion of an interval between
the first and second time slots; and
based on the samples, calculating a received signal quality value during at least the portion of the interval between the
first and second time slots during which the RF receiving circuit is powered down by correlating at least a portion of the
samples with at least a portion of a scrambling code,
wherein the first burst of data is a burst of a paging block, and wherein the second burst of data is a burst of the paging
block that is consecutive to the first burst;
wherein the signal received over the second frequency band has a code period, and wherein a duration of said sampling is not
greater than twenty-five percent of the code period.
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