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21 September 2006 Research on denoising in WDM laser inter-satellites communication system
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Proceedings Volume 6353, Optical Transmission, Switching, and Subsystems IV; 63532B (2006) https://doi.org/10.1117/12.687270
Event: Asia-Pacific Optical Communications, 2006, Gwangju, South Korea
Abstract
This paper proposes a method of wavelet analysis for de-noising at receiver system in WDM laser inter-satellites communication. Background noises such as galactic noise, sunlight and etc make the received power reduce. The noisy signal is decomposed using wavelets and wavelet packets; then is transformed into wavelet coefficients and the lower order coefficients are removed by applying a soft threshold. De-noised signal is obtained by reconstructing with the remaining coefficients. In this paper, we evaluate different wavelet analysis for de-noising at receiver system in inter-satellites laser communication. Simulation results indicate that if the wavelet de-noising method is used with different wavelet analyzing functions, it will improves the signal to noise ratio (SNR) about 2 dB when the signal frequency is 1.5 GHz.
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Chuanhua Wen, Yang Su, Yuquan Li, and Li Zhou "Research on denoising in WDM laser inter-satellites communication system", Proc. SPIE 6353, Optical Transmission, Switching, and Subsystems IV, 63532B (21 September 2006); https://doi.org/10.1117/12.687270
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