发明授权
US5241319A Antenna beam pointing method for satellite mobile communications system
失效
用于卫星移动通信系统的天线波束点方法
- 专利标题： Antenna beam pointing method for satellite mobile communications system
- 专利标题（中）： 用于卫星移动通信系统的天线波束点方法
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申请号： US687729申请日： 1991-04-19
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公开(公告)号： US5241319A公开(公告)日： 1993-08-31
- 发明人: Ryuji Shimizu
- 申请人： Ryuji Shimizu
- 申请人地址： JPX
- 专利权人： NEC Corporation
- 当前专利权人： NEC Corporation
- 当前专利权人地址： JPX
- 优先权： JPX2-103411 19900419
- 主分类号： G01S3/40
- IPC分类号： G01S3/40 ; H01Q1/27 ; H01Q1/32 ; H01Q3/02 ; H01Q3/26
摘要：
A method for tracking a satellite in a land mobile satellite communications system is disclosed. A rate gyro is provided for use in the event that an automatic satellite tracking is prevented. The satellite is automatically tracked using a receive signal level if the receive signal level equals or exceeds a threshold. An output of the rate gyro is constantly compensated while automatically tracking the satellite. When the receive signal level falls below the threshold and the automatic satellite tracking becomes unable, the satellite is tracked using the compensated output of the rate gyro.
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