Time differences of arrival estimation of mixed interference signals using blind source separation based on wireless sensor networks
| Autor: | Pengwu Wan, Zhou Licun, Zan Li, Benjian Hao, Zhang Mian |
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| Rok vydání: | 2016 |
| Předmět: |
0209 industrial biotechnology
Computer science business.industry 020206 networking & telecommunications 02 engineering and technology Multilateration Signal Blind signal separation Uncorrelated 020901 industrial engineering & automation Interference (communication) Signal Processing 0202 electrical engineering electronic engineering information engineering Electrical and Electronic Engineering Linear combination Telecommunications business Estimation methods Wireless sensor network Algorithm |
| Zdroj: | IET Signal Processing. 10:924-929 |
| ISSN: | 1751-9683 1751-9675 |
| DOI: | 10.1049/iet-spr.2016.0002 |
| Popis: | The estimation of the time differences of arrival (TDOAs) is significant in passive source localisation systems. The TDOA estimation accuracy may directly affect the source location performance. For co-frequency interference environments, the authors address the problem of the passive blind estimation of time-delays for uncorrelated interference source signals based on wireless sensor networks. The received mixtures at the sensors are modelled as unknown linear combinations of the differently delayed versions of the communication signal and the interference signal. Blind source separation and secondary interference signal extracting are both introduced in the proposed method. The interference signals in the mixed receiving signals of all the sensors are extracted effectively and the effect of the mixed communication signals can be significantly reduced. Simulations show that the proposed method has a more accurate performance compared to other TDOA estimation methods, and is therefore valid and practical in the TDOA localisation systems. |
| Databáze: | OpenAIRE |
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