Design of UWB Pulses in Terms of B-Splines(Pulse Shape, <Special Section>Ultra Wideband Systems)
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概要
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The present paper discusses a new construction of UWB pulses within the framework of soft-spectrum adaptation. The employed basis functions are B-splines having the following properties : (i) The B-splines are time-limited piecewise polynomials. (ii) The first-order B-splines are rectangular pulses and they converge band-limited functions at the limit that their order tends to infinity. (iii) There are an analog circuit and a fast digital filter for the generation of B-splines. Simple application of Gram-Schmidt orthonormalization process to the shifted B-splines results in a few basic pulses, which are well time-limited and have a broad band width, but do not comply with the FCC spectral mask. A constrained approximation technique is proposed for adaptively designing pulses so that they approximate target frequency characteristics. At the cost of using eleven shifted B-splines, an example set of four pulses comforting the FCC spectral mask is obtained.
- 社団法人電子情報通信学会の論文
- 2005-09-01
著者
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MATSUO Mitsuhiro
Department of Anatomy, Faculty of Medicine, University of Toyama
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Kamada Masaru
Department Of Computer And Information Sciences Faculty Of Engineering Ibaraki University
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Kamada Masaru
Ibaraki Univ. Hitachi‐shi Jpn
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Habuchi Hiromasa
Department Of Computer And Information Sciences College Of Engineering Ibaraki University
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Habuchi Hiromasa
Department Of Computer And Information Sciences Ibaraki University
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Matsuo Mitsuhiro
Department Of Anatomy Faculty Of Medicine University Of Toyama
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