A calculation method and device for partial frequency points based on fft library function

A calculation method and technology of a calculation device, applied in the field of FFT algorithm, can solve problems such as time and resource waste

Active Publication Date: 2021-02-19
TIME VARYING TRANSMISSION CO LTD
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  • Claims
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Problems solved by technology

[0018] The embodiment of the present invention provides a method and device for calculating partial frequency points based on FFT library functions, which solves the technical problem of waste of time and resources in the calculation process of partial frequency points in the current FFT library functions

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  • A calculation method and device for partial frequency points based on fft library function
  • A calculation method and device for partial frequency points based on fft library function
  • A calculation method and device for partial frequency points based on fft library function

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Embodiment Construction

[0049] The embodiment of the present invention provides a method and device for calculating partial frequency points based on FFT library functions, which solves the technical problem of waste of time and resources in the calculation process of partial frequency points in the current FFT library functions.

[0050]In order to make the objectives, features, and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Apparently, the embodiments described below 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.

[0051] see figure 1 , an embodiment of a metho...

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Abstract

The embodiment of the present invention discloses a method and device for calculating partial frequency points based on the FFT library function. The embodiment of the present invention obtains two subsequences by decomposing the target frequency point sequence, and then performs FFT calculation on the subsequences to obtain the FFT result. Finally, the FFT results are calculated according to the frequency points required by the user to obtain the FFT results of some frequency points required by the user, thereby saving the memory space of the processor, and can give full play to the hardware performance of the processor and obtain a shorter running time.

Description

technical field [0001] The invention relates to the field of FFT algorithms, in particular to a method and device for calculating partial frequency points based on FFT library functions. Background technique [0002] In the field of signal processing, DSP chips and FFT operations are often used. For users, the following situations may occur: [0003] 1. Some chip manufacturers do not provide FFT library functions [0004] In this case, the user needs to write the FFT program by himself. Usually due to the time cost and the user's lack of sufficient understanding of the underlying structure of the hardware, the code written by himself is inefficient. At present, DSP manufacturers generally provide FFT library functions, so it is generally not necessary (and users should try not to) write them by themselves. [0005] 2. It is not easy to modify the FFT library function provided by the chip [0006] When the manufacturer provides the library function, the user can directly ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/14
Inventor 张旺李跃星刘耿烨
Owner TIME VARYING TRANSMISSION CO LTD
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