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. 17, 2013
Filed:
Apr. 13, 2012
Saurabh Mishra, Madhepura, IN;
Subrahmanya Kondageri Shankaraiah, Bangalore, IN;
Subramanian Harish Krishnan, Bangalore, IN;
Saurabh Mishra, Madhepura, IN;
Subrahmanya Kondageri Shankaraiah, Bangalore, IN;
Subramanian Harish Krishnan, Bangalore, IN;
Saankhya Labs Private Limited, Bangalore, IN;
Abstract
A receiver for reducing acquisition time of a Carrier Frequency Offset (CFO) of an input intermediate frequency (IF) signal with M-PSK modulated preamble using spectral based analysis is provided. The receiver includes an analog to digital converter that converts the input IF signal into a digital signal, a down conversion unit that down converts the digital signal to a baseband complex signal, and a CFO estimation block that estimates the CFO. The CFO estimation block includes a carrier harmonic generation unit that generates an output of carrier Mharmonic without modulation in the baseband complex signal, a spectral mapping unit that spectrally maps the carrier harmonic using complex Fast Fourier Transform, a spectral analysis unit that performs peak search on the spectrally mapped carrier Mharmonic to obtain a peak position (P), and a carrier frequency offset estimation unit that receives the peak position (P) and estimates the CFO.