Multi-mode configurable FFT processor and method supporting DAB and CDR

A processor and multi-mode technology, applied in the direction of electrical digital data processing, special data processing applications, digital data processing components, etc., to achieve the effect of reducing resource consumption, reducing occupied resources, and reducing resource consumption

Active Publication Date: 2020-04-17
CHONGQING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is how the baseband demodulation chip of the digital broadcasting receiver is compatible with the DAB and CDR two standards and can quickly reconfigure the processing units with different computing functions, so as to realize the two standards in different scenario

Method used

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  • Multi-mode configurable FFT processor and method supporting DAB and CDR
  • Multi-mode configurable FFT processor and method supporting DAB and CDR
  • Multi-mode configurable FFT processor and method supporting DAB and CDR

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Experimental program
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Effect test

Embodiment 1

[0078] like figure 1 As shown, a multi-mode configurable FFT processor supporting DAB and CDR, including a top-level control module, an address generation module and a configurable arithmetic circuit module;

[0079] The top-level control module analyzes the received configuration information to obtain a control signal, uses the control signal to select a data path, configures the control information, and stores and transmits the control information;

[0080] The control information includes a working mode, the number of operation points and the number of butterfly calculation layers, and the working mode includes a radix-2 butterfly operation mode and a radix-4 butterfly operation mode;

[0081] The address generation module generates the operand address of the corresponding working mode and the reading address of the rotation factor according to the working mode, generates the storage address of the operation result number, and combines the operand address, the storage addre...

Embodiment 2

[0132] On the basis of Embodiment 1, the configuration information of this embodiment is 128 points of CDR, and the top-level control module parses the configuration information, using:

[0133]

[0134] where N=128=2 1 *4 3 = 2 5 *4 1 , that is, the working mode includes radix 1-2 butterfly operation, radix 3-4 butterfly operation or radix 5-2 butterfly operation, radix 1-4 butterfly operation, in order to improve calculation efficiency, select 1 Sub-radix-2 butterfly operation, 3-sub-radix-4 butterfly operation as the working mode;

[0135] The control information includes operation points 128, 4 layers of butterfly operation layers and the working mode;

[0136] The butterfly operation unit reconstructs the butterfly operation structure according to the 1st radix-2 butterfly operation and the 3rd radix-4 butterfly operation, and the butterfly operation structure is the fifth level of the radix-2 operation and the radix-4 operation Level 1, radix-4 operations level 2...

Embodiment 3

[0139] On the basis of Embodiment 1, the configuration information of this embodiment is 256 points of CDR, and the top-level control module parses the configuration information, using:

[0140]

[0141] where N=256=2 2 *4 3 = 2 6 *4 1 , that is, the working mode includes 2 radix-2 butterfly operations, 3 radix-4 butterfly operations, 6 radix-2 butterfly operations, 1 radix-4 butterfly operations, in order to improve calculation efficiency, select 2 Sub-radix-2 butterfly operation, 3-sub-radix-4 butterfly operation as the working mode;

[0142] The control information includes operation points 256, 5 layers of butterfly operation layers and the working mode;

[0143]The butterfly operation unit reconstructs the butterfly operation structure according to the 2nd radix-2 butterfly operation and the 3rd radix-4 butterfly operation, and the butterfly operation structure is the fourth level of the radix-2 operation, and the radix-2 operation Level 5, radix-4 operations leve...

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Abstract

The invention discloses a multi-mode configurable FFT (Fast Fourier Transform) processor and method supporting DAB (Digital Audio Broadcasting) and CDR (Code Division Register). The FFT processor comprises a top layer control module, an address generation module and a configurable operational circuit module. The configurable operation circuit module comprises a butterfly operation unit, an input control module, a twiddle factor generation unit and a twiddle factor multiplication unit. The configuration information received by the FFT processor is analyzed by the top layer control unit to obtain a working mode, an operation point number and a butterfly operation layer number; and performing configurable reconstruction on the butterfly arithmetic unit by using the working mode. Arbitrary configuration and operation of different operation points under two standard different modes of DAB and CDR are carried out by reconstructing a butterfly operation structure; the FFT processor is compatible with two standards of DAB and CDR and can quickly reconstruct processing units with different operation functions, the operation efficiency is improved, the resource consumption is reduced, and the circuit area is reduced.

Description

technical field [0001] The invention relates to the technical field of digital multimedia broadcasting, in particular to a multi-mode configurable FFT processor and method supporting DAB and CDR. Background technique [0002] With the continuous development of information communication technology in the direction of digitalization and networking, my country's broadcasting industry has entered a digital development process, gradually shifting from traditional analog FM broadcasting to digital audio broadcasting. At present, the mainstream standards of domestic digital audio broadcasting include digital audio broadcasting (DAB) and China digital broadcasting (CDR). DAB is an all-digital system, suitable for application scenarios with many services and large amounts of data, but the DAB is easy to interfere with the analog broadcast frequency band, does not support digital-analog simulcast, and equipment replacement costs are expensive; CDR supports digital-analog simulcast, an...

Claims

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Application Information

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IPC IPC(8): G06F17/14G06F7/57
CPCG06F17/141G06F7/57Y02D10/00
Inventor 杨虹唐瑶张红升
Owner CHONGQING UNIV OF POSTS & TELECOMM
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