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FFT processor for digital audio broadcasting receiver

A digital audio broadcasting and processor technology, applied in the field of FFT processors, can solve problems such as the complexity of mixed base implementation, and achieve the effect of simplifying the implementation complexity

Inactive Publication Date: 2009-01-28
SICHUAN PANOVASIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commonly used is the algorithm of mixed base 2 and base 4, and the mixed base still has the problem of complex implementation

Method used

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  • FFT processor for digital audio broadcasting receiver
  • FFT processor for digital audio broadcasting receiver
  • FFT processor for digital audio broadcasting receiver

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Embodiment Construction

[0019] In order to better understand the present invention, the present invention will be described in more detail below in conjunction with specific embodiments. It is to be noted that similar components are given similar reference numerals even though they appear in different drawings. In the following description, when a detailed description of known functions and designs employed may obscure the subject matter of the present invention, these descriptions will be omitted here.

[0020] figure 1 It is a structural diagram of the FFT processor of the present invention. In the picture:

[0021] (1) The controller 200 controls the work of the entire FFT processor. When there is input data to be processed, the controller 200 sends a control signal.

[0022] (2) After the address generator 300 receives the control signal, it generates 4096 data addresses and sends them to the block floating point unit 500 and the FFT unit 600 .

[0023] (3) After receiving the signal from the...

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PUM

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Abstract

The invention discloses an FFT processor for a digital audio frequency broadcasting receiver. In the FFT processor of the invention, DAB signals with different lengths, namely the input data of the FFT processor, are supplemented to be 4096 points meeting the 4 length in a simple zeroing mode, and by utilizing the same length, namely the FFT unit with the length of the 4096 point conducts the FFT calculation on the 4096 point data generated by the zeroing, and according to the logical derivation relation, the FFT result of the input data length is acquired from the FFT calculation result; therefore, by utilizing the same length, namely the FFT unit with the length of the 4096 point, the FFT calculation of the input data with a plurality of length modes of 2048, 512, 256 and 1024 length is realized, thereby simplifying the realizing complexity of the FFT algorithm.

Description

technical field [0001] The invention relates to a digital audio broadcasting receiver, in particular to an FFT processor therein. Background technique [0002] The development of digital processing technology has made the transition from analog to digital broadcasting a trend. At present, some wireless broadcasts have adopted digital transmission, and others are preparing to adopt digital transmission. Digital audio broadcasting adopts Orthogonal Frequency Division Multiplexing (OFDM) technology, in which the FFT processor used can process four digital audio broadcasting (DAB) signals with lengths of 256, 512, 1024, and 2048. [0003] The traditional FFT processor adopts different data address generation algorithms and butterfly operation algorithms according to DAB signals of different lengths, and such processing methods will lead to complicated implementation. [0004] Typically, base-2 arithmetic is used to handle length-2 n The FFT operation of the DAB signal, such a...

Claims

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Application Information

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IPC IPC(8): H04H40/18H04B1/06
Inventor 霍永青
Owner SICHUAN PANOVASIC TECH