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:
Aug. 19, 2014
Filed:
Nov. 08, 2011
Ramesh Annavajjala, Natick, MA (US);
Liangbin LI, Irvine, CA (US);
Philip Orlik, Cambridge, MA (US);
Ramesh Annavajjala, Natick, MA (US);
Liangbin Li, Irvine, CA (US);
Philip Orlik, Cambridge, MA (US);
Mitsubishi Electric Research Laboratories, Inc., Cambridge, MA (US);
Abstract
Interference in a received orthogonal frequency division multiplexing (OFDM) symbol, modulated according to selected constellation points s, is reduced. The symbol includes a set of pilot signals and a set of data signals y, where k is a number of consecutive subcarriers used for the pilot and the data signals. The pilot signals are thresholded to detect interfering pilot signals, which are then erased. Channels Ĥare estimated using remaining pilot signals. The set of data signals are decoded based on the estimated channels Ĥ, and, for each bit bin the set of data signals, a logarithmic likely ratio (LLR) is determined. The LLR is an indicator of the likely interference.