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Preprocessing of ionospheric echo Doppler spectra |
| FANG Liang, ZHAO Zhengyu, WANG Feng, SU Fanfan |
| School of Electronic Information, Wuhan University, Wuhan 430072, China |
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Abstract The real-time information of the distant ionosphere can be acquired by using the Wuhan ionospheric oblique backscattering sounding system (WIOBSS), which adopts a discontinuous wave mechanism. After the characteristics of the ionospheric echo Doppler spectra were analyzed, the signal preprocessing was developed in this paper, which aimed at improving the Doppler spectra. The results indicate that the preprocessing not only makes the system acquire a higher ability of target detection but also suppresses the radio frequency interference by 6 7 dB.
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Issue Date: 05 December 2007
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