The Wireless-Receiver-LSI Design Technique for Suppressing Adjacent Channel Interference Signal using Chanel-Grouping Method
| Project/Area Number |
26420317
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Electron device/Electronic equipment
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| Research Institution | Nippon Institute of Technology |
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Principal Investigator |
UGAJIN Mamoru 日本工業大学, 工学部, 教授 (90506164)
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| Co-Investigator(Kenkyū-buntansha) |
束原 恒夫 会津大学, コンピュータ理工学部, 教授 (10433153)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2014: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
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| Keywords | 無線受信回路 / イメージ妨害信号 / 多位相アナログ信号 / 電子回路 / 多相アナログ信号処理 / イメージ妨害信号抑圧 / ３相アナログ信号処理 / 複素フィルタ / イメージ信号除去 / 3相信号 / 無線受信器 / アナログ回路 |
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| Outline of Final Research Achievements |
A high-image-rejection wireless receiver with an N-phase active RC complex filter is proposed and analyzed. Signal analysis shows that the double-conversion receiver with (N+N*N) mixers corrects the gain and phase mismatches of the adjacent image. Monte Carlo simulations evaluate the relation between image-rejection performances and the dispersions of device parameters for the double-conversion wireless receiver. The simulations show that the image rejection ratio of the adjacent image depends almost only on R and C mismatches in the complex filter.
For controlling the pass-band of a 3-phase active complex filter, switched capacitor architectures were analyzed. Then two types of circuits were devised and designed. Modified 3-phase mixers for canceling folding noises by even-order distortions were devised and analyzed. In principle, 3-phase signal processing could eliminate the folding noise by the 3-order distortion, thus the degradation of the mixer noise figure were reduced by 2 dB.
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Report
(4 results)
Research Products
(9 results)
