Presentation 2008-01-25
A New Multiband Frequency Down-Conversion Method by Up-conversion to Common Frequency Band for Cognitive Radio
Naohiro FUKAYA, Hiroshi HARADA, Ryuhei FUNADA, Tetsushi IKEGAMI,
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Abstract(in English) Cognitive radio wireless systems require an RF unit that enables adaptive bandpass filtering for recognizing and selecting available wireless systems each of which has predefined frequency band and bandwidth. A conventional method required a filter bank consisting of multiple bandpass filters, and this filter bank dominated the size of RF unit. This paper proposes a new down-conversion method that supports multiband and bandwidths by introducing up-conversion to common frequency followed by single band signal processing. As an advantage, intermediate frequency bandpass filters whose center frequencies and bandwidths are fixed can cut off undesired signals with converting the center frequency of the received signal by a tunable synthesizer even if undesired signals are up-converted together. This paper derives how to optimize parameters of filters and evaluates the performance of proposed method by using a prototype.
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Keyword(in English) Software radio / cognitive radio / multiband / down-converter / tunable synthesizer
Paper # SR2007-79
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Conference Date 2008/1/17(1days)
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Registration To Software Radio(SR)
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) A New Multiband Frequency Down-Conversion Method by Up-conversion to Common Frequency Band for Cognitive Radio
Sub Title (in English)
Keyword(1) Software radio
Keyword(2) cognitive radio
Keyword(3) multiband
Keyword(4) down-converter
Keyword(5) tunable synthesizer
1st Author's Name Naohiro FUKAYA
1st Author's Affiliation Graduate School of Science and Engineering, Meiji University:National Institute of Information and Communications Technology()
2nd Author's Name Hiroshi HARADA
2nd Author's Affiliation National Institute of Information and Communications Technology
3rd Author's Name Ryuhei FUNADA
3rd Author's Affiliation National Institute of Information and Communications Technology
4th Author's Name Tetsushi IKEGAMI
4th Author's Affiliation Graduate School of Science and Engineering, Meiji University:National Institute of Information and Communications Technology
Date 2008-01-25
Paper # SR2007-79
Volume (vol) vol.107
Number (no) 452
Page pp.pp.-
#Pages 7
Date of Issue