Proceedings of the Symposium on Global and Environmental Monitoring: Proceedings of the Symposium on Global and Environmental Monitoring

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Persistent identifier:: 856665355

Title:: Proceedings of the Symposium on Global and Environmental Monitoring

Sub title:: techniques and impacts ; September 17 - 21, 1990, Victoria Conference Centre, Victoria, British Columbia, Canada

Year of publication:: 1990

Place of publication:: Victoria, BC

Publisher of the original:: [Verlag nicht ermittelbar]

Identifier (digital):: 856665355

Language:: English

Document type:: Multivolume work

Volume

Persistent identifier:: 856669164

Title:: Proceedings of the Symposium on Global and Environmental Monitoring

Sub title:: techniques and impacts; September 17 - 21, 1990, Victoria Conference Centre, Victoria, British Columbia, Canada

Scope:: XIV, 912 Seiten

Year of publication:: 1990

Place of publication:: Victoria, BC

Publisher of the original:: [Verlag nicht ermittelbar]

Identifier (digital):: 856669164

Illustration:: Illustrationen, Diagramme, Karten

Signature of the source:: ZS 312(28,7,1)

Language:: English

Usage licence:: Attribution 4.0 International (CC BY 4.0)

Editor:: International Society for Photogrammetry and Remote Sensing, Commission of Photographic and Remote Sensing Data

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2016

Document type:: Volume

Collection:: Earth sciences

Chapter

Title:: [THP-5 IMAGE INTERPRETATION AND ANALYSIS]

Document type:: Multivolume work

Structure type:: Chapter

Chapter

Title:: AIR QUALITY AND EMVIRONMENTAL MONITORING IN CHINA BY THE YEAR OF 2000. Chunming Cheng

Document type:: Multivolume work

Structure type:: Chapter

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences. Vol. XXXVII. Part B2. Beijing 2008 The improved equalizer structure is shown in figure 6. Although it is a little more complicated than linear transversal equalizer, the effect of it is obvious when equation (5) is true. We can use pipelining in practice. 4.2 Groups of Simulation results 4.2.1 The eye diagram without fading: We give the original signal as figure 9. It is a simulation under the ideal conditions, therefore, the “eye” is perfect. Received signal(two-path) Figure 6. improved linear transversal equalizer 4. SIMULATION RESULTS Figure 9. eye diagram of signal without multipath 4.2.2 The eye diagram of two-ray signal and signal with equalizer: In order to compare, we give the two-ray signal and signal after equalizer as figure 10. It is obvious that the equalizer make the closed eye diagram open, which means the signal can be judged correctly. Also, it verified the effect of the equalizer model we built. Go into details, the simulation condition meets the specification as equation (5). 4.1 Simulation Introduction To verify the performance of the equalizer, we did some emulation with the software SYSTEMVUE2006. The model built in it is shown in Figure7. Moreover, some groups of emulation are compared to make the characteristics of equalizer more clearly. The simulation results will be shown in the next parts. iiftSïBüSü ñftSSB! Figure 7. the model built in systemvue2006 The position of equalizer in the receiver is shown in figure 8. It is just behind the A/D convertor, meanwhile, the output of the equalizer should be similar to the input of the DDC. Figure 8. the position of equalizer in the receiver Figure 10. comparison of eye diagram between two-ray signal and signal after equalizer 4.2.3 The eye diagram of two-ray signal and signal with improved equalizer: When equation (5) is not true, the equalizer like figure (5) doesn’t work any longer. The improved equalizer will be tested in this part. The simulation results is shown in figure 11. What is clear, the eye diagram of the signal after original equalizer, when equation (5) is false, is even worse than that of the two-ray signal. But the improved equalizer can weaken the effect of reflection signal under this condition. (a)Two-ray signal (b)Signal after linear (c)Signal after improved transversal equalizer equalizer Figure 11. comparison of eye diagram between signal after two kinds of equalizer when equation (5) is false

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