講演抄録/キーワード |
講演名 |
2009-07-30 11:45
Transmission Schemes of Cognitive Radio System with Power Control over Rayleigh Fading ○Chen Sun・Yohannes D. Alemseged・Ha Nguyen Tran・Hiroshi Harada(NICT) SR2009-43 |
抄録 |
(和) |
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 0.001 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. |
(英) |
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 0.001 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. |
キーワード |
(和) |
Cognitive radio / power control / interference constraint / spectrum sensing / energy detection / selective sensing / Rayleigh fading / maximum ratio combining (MRC) |
(英) |
Cognitive radio / power control / interference constraint / spectrum sensing / energy detection / selective sensing / Rayleigh fading / maximum ratio combining (MRC) |
文献情報 |
信学技報, vol. 109, no. 155, SR2009-43, pp. 131-138, 2009年7月. |
資料番号 |
SR2009-43 |
発行日 |
2009-07-22 (SR) |
ISSN |
Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 |
著作権に ついて |
技術研究報告に掲載された論文の著作権は電子情報通信学会に帰属します.(許諾番号:10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) |
PDFダウンロード |
SR2009-43 |