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:
Dec. 08, 2015
Filed:
Jun. 08, 2015
Saankhya Labs Pvt. Ltd, Bengaluru, IN;
Srinidhi Nagaraja, Davangere, IN;
Shrinivas Subramania Bhat, Bengaluru, IN;
Other;
Abstract
A method of ranging and sub-carrier selection in an orthogonal frequency division multiple access (OFDMA) system and the OFDMA system is disclosed. An OFDM symbol is received from a customer premises equipment (CPE) at a base station. The OFDM symbol is demodulated for obtaining a plurality of subcarriers. A plurality of data subcarriers are multiplied by zeros and stored. A plurality of uniformly spaced subcarriers is extracted from the stored subcarriers. A ranging CPE is detected in uniformly spaced subcarriers. Delay estimation is performed using the stored plurality of subcarriers upon detecting presence of ranging CPE. A method of subcarrier allocation at a ranging CPE transmitter based on total number of subcarriers, subcarriers in used band, a delay spread to be supported in terms of number of samples, a required ratio of highest amplitude to second highest amplitude of the ranging signal is disclosed.