Research on denoising in WDM laser inter-satellites communication system

Details Research on denoising in WDM laser inter-satellites communication system Research on denoising in WDM laser inter-satellites communication system

Oct 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006spie.6353e..64w&link_type=abstract

Optical Transmission, Switching, and Subsystems IV. Edited by Park, Chang Soo; Xie, Shizhong; Menyuk, Curtis R.; Kitayama, Ken-i

Computer Science

Scientific paper

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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