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Device and method for realizing 65536-point fft based on fpga

A technology of complex addition and complex multiplication, which is applied in the field of FPGA-based 65536-point FFT devices, can solve the problems of slow FFT processing speed and other problems, and achieve the effects of eliminating data input and output bottlenecks, reducing the use of RAM resources, and fast processing speed

Active Publication Date: 2019-02-01
西安卓鸣电子科技有限公司
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Problems solved by technology

[0004] For the problems referred to above, the object of the present invention is to provide devices and methods based on FPGA to realize 65536-point FFT, to overcome the slow problem of FFT processing operation speed in the prior art

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  • Device and method for realizing 65536-point fft based on fpga
  • Device and method for realizing 65536-point fft based on fpga
  • Device and method for realizing 65536-point fft based on fpga

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[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0048] The technical solution of the present invention adopts the radix-16 butterfly operation module as the data processing unit, so the FFT of 65536 point data needs four stages of operations, and each stage performs 4096 times of butterfly operations. After the data is serially input, it is first stored in the RAM storage module, and then a set of 16-point data is read each time according to a certain rule, and the 16-way parallel butterfly operation is perf...

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Abstract

The invention belongs to the field of digital signal processing, and discloses a device and method for realizing 65536 point FFT (Fast Fourier Transform) on the basis of an FPGA (Field Programmable Gate Array). The operation speed of the FFT is accelerated by increasing the number of data points capable of being processed in one clock period in an input and output part, a storage part and a processing part. In an input interface part, the parallel data input is realized by using a great-bit-width data wire, and the data input time is reduced; in the storage part, the storage is performed in a conflict-free mode and the simultaneous reading and writing of 16-point data can be realized in one clock period; the operation result is subjected to in-situ storage so that RAM (Random Access Memory) resources are saved; in the processing part, a radix-16 operation kernel is used, and the processing speed is accelerated, so that 16-point data can be processed in one clock period; and in an output interface part, a great-bit-width parallel output technology is used, and the high-speed output of the processing result is realized.

Description

technical field [0001] The invention relates to the field of digital signal processing, in particular to a device and method for realizing 65536-point FFT based on FPGA. Background technique [0002] Fourier transform has extremely important significance in theory. With the development of computer technology and the appearance of discrete Fourier transform (DFT), Fourier transform has entered the stage of practical application in engineering. However, due to the huge workload and long operation time of the DFT algorithm, the application of this data processing method is limited. Subsequently, the appearance of the Fast Fourier Transform (FFT) reduced the calculation amount of DFT from O(N2) to O(Nlog2N) times, and achieved a breakthrough in the field of digital signal processing technology. As the basic operation of time domain and frequency domain conversion, FFT has become a necessary means of digital signal processing and is widely used in radar, communication, sonar an...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/14
CPCG06F17/14
Inventor 贾艳艳
Owner 西安卓鸣电子科技有限公司
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