Invention Grant
US08832171B2 Index generation scheme for prime factor algorithm based mixed radix discrete fourier transform (DFT)
有权
基于素数算法的混合基数离散傅里叶变换(DFT)的索引生成方案
- Patent Title: Index generation scheme for prime factor algorithm based mixed radix discrete fourier transform (DFT)
- Patent Title (中): 基于素数算法的混合基数离散傅里叶变换(DFT)的索引生成方案
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Application No.: US13435073Application Date: 2012-03-30
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Publication No.: US08832171B2Publication Date: 2014-09-09
- Inventor: Gururaj Padaki , Saurabh Mishra , Suman Sanisetty
- Applicant: Gururaj Padaki , Saurabh Mishra , Suman Sanisetty
- Applicant Address: IN Bangalore, Karnataka
- Assignee: Saankhya Labs Pvt. Ltd.
- Current Assignee: Saankhya Labs Pvt. Ltd.
- Current Assignee Address: IN Bangalore, Karnataka
- Agency: Mendelsohn, Drucker & Dunleavy, P.C.
- Agent Steve Mendelsohn
- Priority: IN1083/CHE/2011 20110331
- Main IPC: G06F17/14
- IPC: G06F17/14

Abstract:
In one embodiment, a processor performs a method of generating pipelined data read indexes and data write indexes for a Prime Factor Algorithm (PFA) Discrete Fourier Transform (DFT) without look-up tables. The processor is adapted to factorize an ‘N’ point PFA DFT into one or more mutually prime factors and zero or more non-prime factors, calculate a 0th column index for an ith row (Xi0), calculate an IndCor when the value of Xi0 equals zero and when a row number (i) does not equal zero, calculate Xij, generate the data read indexes, perform a DFT kernel computation on Lk point for the mutually prime factors and the non-prime factors, and generate the data write indexes for the mutually prime factors and the non-prime factors. Xij represents ith row and jth column of 2D input Buffer and enables a selection of a linear index from the 2D input buffer.
Public/Granted literature
- US20120254274A1 Index Generation Scheme for Prime Factor Algorithm Based Mixed Radix Discrete Fourier Transform (DFT) Public/Granted day:2012-10-04
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