The Fourier Transform and its Applications
The Fourier Transform and its Applications
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DOI:
10.1049/ep.1965.0268
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发表时间:
1965
期刊:
影响因子:
--
通讯作者:
K. W. Cattermole
中科院分区:
文献类型:
--
作者:
K. W. Cattermole
There are many books on this subject, and any addition to their number needs to be justified either by special excellence or by some worthwhile novelty of approach: this one deserves halfmarks on the first score, and full marks on the second. The author explains its genesis as a commentary to a pictorial dictionary of transforms. Virtually all the theorems and specific transforms cited are abundantly illustrated by clear diagrams and discussion of physical significance. The relations between the abstract analytic approach, the graphical representation, and several applications are clearly expounded. Indeed, my own first reaction on scanning the text was one of recognition: here, in a coherent presentation, were several topics that I had first learnt in isolation, whose similarities had slowly dawned on me through the years, and which I should wish to explain in just this way myself.The treatment is founded on the Fourier integral rather than the series; discrete terms are represented as impulses, which are justified by the'generalised-function'approach. As the latter is so fundamental, it is a pity that its exposition is the weakest part of the work, neither as lucid nor as rigorous as LighthilPs book which Bracewell cites as an authority. All the usual properties of Fourier transforms in one and two dimensions are given, with emphasis on convolution and on the use of repeated impulse trains and other idealised waveforms; the special notations used for these are helpful. Other integral transforms are explained as relatives of the Fourier transform. The applications treated are to signal representation and filtering, antenna radiation patterns, diffusion and statistics. There are many problems, some of them unusually well contrived to be thoughtprovoking. On the whole, it is a clear and useful volume. KW CATTERMOLE