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 Japanese) | (See Japanese page) |
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. |
Keyword(in Japanese) | (See Japanese page) |
Keyword(in English) | Software radio / cognitive radio / multiband / down-converter / tunable synthesizer |
Paper # | SR2007-79 |
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Conference Information | |
Committee | SR |
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Conference Date | 2008/1/17(1days) |
Place (in Japanese) | (See Japanese page) |
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Topics (in Japanese) | (See Japanese page) |
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Paper Information | |
Registration To | Software Radio(SR) |
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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 |