A study on blind signal separation using independent component analysis in multiple antenna systems
| Autor: | Yuki, Norimatsu, Hideichi, Sasaoka, Hisato, Iwai |
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| Jazyk: | japonština |
| Rok vydání: | 2017 |
| Předmět: | |
| Zdroj: | 同志社大学ハリス理化学研究報告 = The Harris science review of Doshisha University. 58(2):63-72 |
| ISSN: | 2189-5937 |
| Popis: | 複数アンテナを用いた通信システムが同一周波数を同時に共用する場合，複数の信号が空間上で合成されて合成信号が受信される．この相互干渉を起こす合成信号は，電波伝搬係数が既知の場合に個々の信号成分に分離可能であるが，複数システムが異種システムの場合には信号分離が難しい．本論文では，複数アンテナシステムで受信した合成信号の独立成分分析によるブラインド信号分離を取り扱う．そして，独立成分分析の正常動作を評価する基準を検討し，各信号成分と伝搬係数を推定する方式を提案する．また，伝搬係数推定の応用として個々の信号の到来方向推定と他システムへの干渉回避法を提案する．提案方式の有効性を確認するため，計算機シミュレーションを実施した．計算機シミュレーションの結果、提案方式により各信号成分と伝搬係数の推定が十分な精度で可能なことが分かった．また，提案方式が、到来方向推定が有効であること，独立成分分析が正常動作する場合に他システムへの干渉回避に有効であることが分かった． In the multiple antenna communication systems with same frequency band, multiple transmitting signals are composed in space and the composed signals are received. The composed signals which occurs mutual interface are easily separated to each signal component in the case of known propagation efficient, but separation of composed signals is difficult in the case of different systems. This paper deals with blind signal separation using ICA (Independent Component Analysis) for the composed signals which received in multiple antenna systems. This paper studies the criterion to estimate the normal action of ICA and proposes the estimation method of each signal component and propagation coefficient. As an application of the estimated propagation coefficient, this paper also proposes the estimation method of incoming direction of each signal and the interference avoidance scheme to other systems. Computer simulation is carried out to confirm the usefulness of proposed system. Simulation results show that the proposed method estimates the each signal component and propagation coefficient with sufficient accuracy. Simulation results also show that the proposed method is useful for the estimation of incoming direction of each signal and that the proposed method is useful for the interference avoidance to other systems in the case of the normal action of ICA. |
| Databáze: | OpenAIRE |
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