Microcomputer-based real-time/online f.f.t. processor
作者:
W.K.Luk,
H.F.Li,
期刊:
IEE Proceedings E (Computers and Digital Techniques)
(IET Available online 1980)
卷期:
Volume 127,
issue 1
页码: 18-23
年代: 1980
DOI:10.1049/ip-e.1980.0006
出版商: IEE
数据来源: IET
摘要:
The fast Fourier transform (f.f.t.) has found wide applications in areas requiring the processing of uniformly sampled signals. This paper investigates the characteristics of using a standard, inexpensive micro-computer system to implement an f.f.t. processor operating in either real-time or online mode. Various aspects on the maximum sampling rate in either mode of operation, such as the limitation by the system input/output time and f.f.t. computation time, as well as the aliasing-free condition to process bandlimited periodic signals, are revealed. The sampling clock is made adaptive to the real-time signal. So the processor is capable of processing signals from d.c. up to the online aliasing frequency. An example of real-time/online line-voltage fault detection is also included.
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