講演抄録/キーワード |
講演名 |
2015-05-28 15:40
Channel Direction Information Probing for Multi-Antenna Cognitive Radio System ○Fang Yuan・Gabriel Porto Villardi・Fumihide Kojima・Hiroyuki Yano(NICT) SR2015-7 |
抄録 |
(和) |
This work studies the problem of channel direction information (CDI) probing for cognitive radio systems with multiple antennas. The CDI from the secondary transmitter (ST) to primary receiver (PR) needs to be acquired by the ST for beamforming in the interference mitigation. Due to the lack of explicit cooperation between primary and secondary systems,
the CDI has to be acquired by means of probing, which is generally challenging. In this work, we consider the case for the line of sight (LoS) channels, and propose one simple CDI probing scheme by exploiting the hidden primary transmitter (PT) feedback. Specifically, the ST sends two probing signals with directional beamforming towards the PR, and then actively learns the hidden feedback from the PT to acquire the targeted CDI. The proposed scheme is of low complexity and irrespective of channel gains. To show the impact of Non-LoS channels on the proposed scheme, the performance of acquired CDI accuracy is further analyzed under Rician channels. Simulation results show that the proposed scheme works very well for channels with moderate Rician K factor. |
(英) |
This work studies the problem of channel direction information (CDI) probing for cognitive radio systems with multiple antennas. The CDI from the secondary transmitter (ST) to primary receiver (PR) needs to be acquired by the ST for beamforming in the interference mitigation. Due to the lack of explicit cooperation between primary and secondary systems,
the CDI has to be acquired by means of probing, which is generally challenging. In this work, we consider the case for the line of sight (LoS) channels, and propose one simple CDI probing scheme by exploiting the hidden primary transmitter (PT) feedback. Specifically, the ST sends two probing signals with directional beamforming towards the PR, and then actively learns the hidden feedback from the PT to acquire the targeted CDI. The proposed scheme is of low complexity and irrespective of channel gains. To show the impact of Non-LoS channels on the proposed scheme, the performance of acquired CDI accuracy is further analyzed under Rician channels. Simulation results show that the proposed scheme works very well for channels with moderate Rician K factor. |
キーワード |
(和) |
Cognitive Radio / CDI / Probing / Hidden Feedback / / / / |
(英) |
Cognitive Radio / CDI / Probing / Hidden Feedback / / / / |
文献情報 |
信学技報, vol. 115, no. 62, SR2015-7, pp. 39-44, 2015年5月. |
資料番号 |
SR2015-7 |
発行日 |
2015-05-21 (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 |
SR2015-7 |
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