Discrete conversion operational apparatus

A computing device and discrete transformation technology, applied in complex mathematical operations, calculations, code conversion, etc., can solve problems such as processor interruptions

Inactive Publication Date: 2003-04-02
PENDRAGON WIRELESS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Thus, the processor is interrupted during the operation

Method used

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  • Discrete conversion operational apparatus

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Embodiment Construction

[0022] The present disclosure relates to an example of a discrete transform arithmetic device used in a receiver in the field of terrestrial television.

[0023] Transmitters and receivers are used in transmission systems for signal transmission over channels (not shown), especially in the field of terrestrial television. The transmitter modulates the signal to convert the digital signal to an analog signal and simultaneously transmits this signal in the channel. At the output of the channel, a receiver that demodulates the signal and converts the analog signal into a digital signal completes the signal reception.

[0024] Different techniques are used in the DVB-T ("Digital Video Broadcasting Terrestrial") standard, such as the OFDM technique ("Orthogonal Frequency Division Multiplexing") used in Europe in the demodulation process. This technique uses, inter alia, the fast operation of the discrete Fourier transform.

[0025] During digital signal reception, the receiver gr...

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Abstract

The invention relates to a device (FFTP) for computing discrete transforms. The device comprises a local memory (RAM2) for registering results of sub-transform computations, a sub-transform computation comprising several computation layers. The device is characterized by computation means (CAL_M) which are capable of interlacing computation layers of two or several consecutive sub-transforms of the same size.

Description

technical field [0001] The invention relates to a device for operating on a discrete transform comprising sub-transforms, the device comprising a local memory for recording the results of the operation of the sub-transforms, the sub-transform operations comprising a plurality of layers of operations. The invention also relates to an algorithm suitable for the device. Background technique [0002] This invention is especially useful for channel decoding during terrestrial signal transmission. [0003] In 1998, the journal number 0-7803-4344-1 published by IEEE International Solid State Circuits is a document titled "Multimedia Broadcasting Energy-Saving Single-Chip OFDM Demodulator and Channel Decoder", which describes the discrete transform computing equipment, here The transform of refers to the Fourier transform in OFDM ("Orthogonal Frequency Division Multiplexing") receivers. Each Fourier transform provides an OFDM receiver with a variable space of 1024 to 8192 data or ...

Claims

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Application Information

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IPC IPC(8): G06F7/00G06F17/14H03M7/30
CPCG06F17/142G06F7/00
Inventor O·盖伊-贝利勒E·杜亚丁
Owner PENDRAGON WIRELESS LLC
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