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:
Sep. 07, 2004
Filed:
Jul. 09, 2001
Dongxing Jin, Ottawa, CA;
Tropic Networks Inc., Kanata, Ontario, CA;
Abstract
A digital signal processor DSP for bit-reversal of a large data array of a size has a direct memory access (DMA) controller for performing in-place bit reversal routines on an external memory during a first stage, and a central processing unit (CPU) for swapping small sub-arrays on internal memory in a second stage. The two stage method according to the invention importantly reduces the real-time implementation for sorting large size data arrays on uni-processor DSP platforms, by extensively using the external memory and avoiding a random access to the internal memory. As well, the invention provides for improved dense integration and reduced costs when used in dense wavelength division multiplexing (DWDM) systems.