| Presentation | 2009-07-30 Transmission Schemes of Cognitive Radio System with Power Control over Rayleigh Fading Chen SUN, Yohannes D. ALEMSEGED, HaNguyen TRAN, Hiroshi HARADA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This paper addresses the transmission schemes of cognitive radio system (CRS) with power control. An adaptive power control scheme in Rayleigh fading channel is proposed. The transmit power of a secondary user (SU) is adjusted in Rayleigh fading to maximize the constant output signal-to-noise ratio (SNR) at an SU receiver while keeping the interference to a primary user (PU) under given constraints. To calculate the maximum constant output SNR at the SU receiver under the interference constraints of the PUs, we develop an analytical model for the distribution of the interference to PUs while considering the detection performance at the SUs. The analytical model takes into account of the use of multiple antennas and includes a single antenna scenario as a special case. The CRS transmission with the proposed adaptive power control scheme is compared with the transmission using a straightforward fixed power control scheme for the CRS in terms of bit-error-rate (BER). Results show that the proposed adaptive power control scheme outperforms the fixed power control scheme. For example, when the BER is 10^<-3> the adaptive power control scheme with two transmit antennas and two receive antennas has a 3-dB improvement in SNR as compared with the fixed power control scheme. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Cognitive radio / power control / interference constraint / spectrum sensing / energy detection (ED) / selective sensing / Rayleigh fading / maximum ratio combining (MRC) |
| Paper # | SR2009-43 |
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| Conference Information | |
| Committee | SR |
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| Conference Date | 2009/7/22(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Registration To | Software Radio(SR) |
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| Language | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Transmission Schemes of Cognitive Radio System with Power Control over Rayleigh Fading |
| Sub Title (in English) | |
| Keyword(1) | Cognitive radio |
| Keyword(2) | power control |
| Keyword(3) | interference constraint |
| Keyword(4) | spectrum sensing |
| Keyword(5) | energy detection (ED) |
| Keyword(6) | selective sensing |
| Keyword(7) | Rayleigh fading |
| Keyword(8) | maximum ratio combining (MRC) |
| 1st Author's Name | Chen SUN |
| 1st Author's Affiliation | New Generation Wireless Communications Research Center National Institute of Information and Communications Technology (NICT)() |
| 2nd Author's Name | Yohannes D. ALEMSEGED |
| 2nd Author's Affiliation | New Generation Wireless Communications Research Center National Institute of Information and Communications Technology (NICT) |
| 3rd Author's Name | HaNguyen TRAN |
| 3rd Author's Affiliation | New Generation Wireless Communications Research Center National Institute of Information and Communications Technology (NICT) |
| 4th Author's Name | Hiroshi HARADA |
| 4th Author's Affiliation | New Generation Wireless Communications Research Center National Institute of Information and Communications Technology (NICT) |
| Date | 2009-07-30 |
| Paper # | SR2009-43 |
| Volume (vol) | vol.109 |
| Number (no) | 155 |
| Page | pp.pp.- |
| #Pages | 8 |
| Date of Issue | |