A Signal Blocking Detection and Restoration Method for Mobile Communication Antenna
A recovery method and occlusion detection technology, applied in the field of satellite communication, can solve problems such as satellite communication blocking, and achieve the effect of calibration
Active Publication Date: 2020-07-14
SHANDONG INST OF AEROSPACE ELECTRONICS TECH
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Problems solved by technology
In the case of complete occlusion, such as the occlusion of tall buildings and culverts next to the road, the receiver cannot receive the signal, and the satellite communication will be blocked
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[0037] The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0038] A signal occlusion detection and recovery method for a communication antenna in motion according to the present invention processes the occlusion in four stages, including stage one occlusion detection stage, stage two relying on inertial navigation tracking stage, stage three sine scanning fast star-seeking stage, Phase 4 is the 360-degree scanning star-seeking phase, in which phases 1 and 2 can achieve zero-wait recovery, and phase 3 can achieve rapid recovery. The implementation details of the specific scheme are as follows.
[0039] Step 1. First, the initialization of the antenna is completed, and the star-seeking is performed by 360-degree rotation (the same as the fourth stage of occlusion recovery), and the satellite is aligned to enter the satellite tracking state. In the case of no occlusion, the antenna relies on inertial navigation trac...
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The invention discloses a signal shielding detection and recovery method of an antenna communication in moving. According to the staged processing scheme of inertial navigation performance, the stage one and the stage two sufficiently utilize the inertial navigation performance to realize the zero-waiting recovery of the signal shielding, the stage three realizes the fast satellite searching through sine scanning by using the low precision of the inertial navigation, and the stage four performs the large-range satellite searching in 360 DEG; for detecting whether a satellite signal is lost, the invention provides a detection method for zero-zero signal, thereby accurately judging whether the satellite signal is shielded; a conception of the inertial navigation drifting tolerance time is given out dependent on the inertial navigation tracking stage, and the related factor influencing the concept and an estimation formula are analyzed. At the sine scanning stage, the reduction of the inertial navigation course precision is compensated through the sine scanning, the control method of the sine scanning is provided, the progressive increase of the sine scanning range is realized, an inertial navigation course angle inverse solution computing method and an inertial navigation compensation method installed on an antenna rotary table for the inertial navigation are provided after the signal is scanned, thereby realizing the calibration of the inertial navigation course.
Description
technical field [0001] The invention belongs to the technical field of satellite communication, and specifically relates to a method for detecting and recovering signal occlusion of a communication-in-motion antenna, which is suitable for a communication-in-motion system with low-cost inertial navigation tracking. Background technique [0002] In recent years, driven by the demand for long-distance and broadband multimedia emergency communications in motion, a new satellite communication technology——Satcom On-the-Move (SOTM) emerged and developed rapidly. The essence of mobile satellite communication is broadband mobile satellite communication based on fixed satellite service (Fixed Satellite Service, FSS) resources. The mobile communication system is integrated on mobile carriers such as airplanes, ships, and automobiles, and can transmit multimedia information such as voice, data, and video in real time during fast motion. Mobile communication has the characteristics of f...
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IPC IPC(8): H04B17/00H04B7/185
CPCH04B7/1851H04B17/00
Inventor 韩泉城杨志群苗萍石宝民
Owner SHANDONG INST OF AEROSPACE ELECTRONICS TECH