The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 02, 2017
Filed:
Dec. 31, 2014
Motorola Solutions, Inc, Schaumburg, IL (US);
Alan P Conrad, Geneva, IL (US);
Other;
Abstract
Disclosed herein are methods and systems for dynamic single-frequency-network-(SFN)-multicast symbol synchronization. In an embodiment, a wireless-communication device (WCD) receives an SFN-multicast transmission at least in part by receiving a respective SFN-multicast-transmission signal from each site in a plurality of sites in a given SFN-multicast area, where each such received SFN-multicast-transmission signal has a respective SFN-multicast cyclic prefix. The WCD calculates a multisource multipath delay spread ('MMDS') that is characteristic of the received plurality of SFN-multicast-transmission signals, and determines whether that calculated MMDS exceeds a threshold MMDS. If so, the WCD selects a multicast timing point that is after the SFN-multicast cyclic prefix of a first-received one of the received SFN-multicast-transmission signals. If not, the WCD selects a multicast timing point that is within the SFN-multicast cyclic prefix of the first-received SFN-multicast-transmission signal. The WCD uses the selected multicast timing point to demodulate the received SFN-multicast transmission.