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:
Nov. 15, 2016
Filed:
Feb. 05, 2013
Qualcomm Incorporated, San Diego, CA (US);
Lionel Jacques Garin, Palo Alto, CA (US);
Vinay Sridhara, Santa Clara, CA (US);
Xiaoxin Zhang, Sunnyvale, CA (US);
Sundar Raman, Fremont, CA (US);
Gengsheng Zhang, Cupertino, CA (US);
Bernal A. Arroyo, Santa Clara, CA (US);
Carlos Horacio Aldana, Mountain View, CA (US);
QUALCOMM Incorporated, San Diego, CA (US);
Abstract
Systems, apparatus and methods for determining a cyclic shift delay (CSD) mode from a plurality of CSD modes is disclosed. A received OFDM signal is converted to a channel impulse response (CIR) signal in the time domain and/or a channel frequency response (CFR) signal in the frequency domain. Matched filters and a comparator are used to determine a most likely current CSD mode. Alternatively, a classifier is used with a number of inputs including outputs from two or more matched filters and one or more outputs from a feature extractor. The feature extractor extracts features in the time domain from the CIR signal and/or in the frequency domain from the CFR signal useful in distinguishing various CSD modes.