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:
Jul. 10, 2012
Filed:
Mar. 20, 2009
Hemanth Sampath, San Diego, CA (US);
Kaushik Ghosh, San Diego, CA (US);
Raghu N. Challa, San Diego, CA (US);
Sameer Vermani, San Diego, CA (US);
Hemanth Sampath, San Diego, CA (US);
Kaushik Ghosh, San Diego, CA (US);
Raghu N. Challa, San Diego, CA (US);
Sameer Vermani, San Diego, CA (US);
Qualcomm Incorporated, San Diego, CA (US);
Abstract
In embodiments, a fast Fourier transform (FFT) engine includes a series of stages, each stage containing a butterfly and a data normalization device configured to scale output of the stage's butterfly. The scaling factors are adjusted, for example, periodically or on as-needed basis, so that the dynamic range of the butterflies and the buffers is increased for a given bit-width, or the bit-width of these devices is decreased for the same dynamic range. Additionally, bit-width of other buffer(s) is decreased because of the scaling of the data.
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