A shadow occlusion detection method for satellite mobile communication
A satellite mobile communication and shadow occlusion technology, which is applied in the field of satellite communication, can solve the problems of inability to judge tree shadows, false judgments, and long time consumption, and achieve the effects of eliminating false judgments and overly sensitive detection judgments, increasing speed, and improving accuracy
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[0047] In the Xi'an area (latitude 34.16N, longitude 108.54E), use the 0.6m reflector satellite antenna in motion to receive the Asia-Pacific 3S satellite (longitude 105.5°E), and use the beacon receiver to monitor the change of the received signal strength, as shown in the attached Figure 5 shown.
[0048] 1. Characteristic analysis of received signal strength
[0049] According to the change of received signal strength measured before the test, the following three intervals are divided: L 1 =[0,0.5), L 2 =[0.5,3), L 3 =[3,+∞).
[0050] (1) In an open area, the strength of the signal received by the mobile communication (as shown in the attached Image 6 Shown) mainly jitter within 4.05±0.2V, the signal strength is large, and the change is small. At this time, P 3 = 1, P 1 =P 2 = 0, all signal strengths are at L 3 in the interval;
[0051] (2) When driving on roads covered by utility poles and overpasses, the speed of the vehicle is greater than 30km / h, and the rece...
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