发明名称 |
Method and device for generating a constant envelope navigation signal with four independent codes |
摘要 |
A method and a device for generating a modulated navigation signal which is intended to be used to position a downlink receiver. Four pseudorandom navigation codes of chip rhythms greater than 0.5 MHz are modulated onto a carrier of frequency greater than 500 MHz according to an 8-PSK modulation of constant amplitude with a modulation frequency fM such that: 8fc<=fM where fc=Max(fci), and fci designates the chip rhythms.
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申请公布号 |
US7561103(B2) |
申请公布日期 |
2009.07.14 |
申请号 |
US20050537800 |
申请日期 |
2005.06.07 |
申请人 |
CENTRE NATIONAL D'ETUDES SPATIALES (C.N.E.S.) |
发明人 |
LESTARQUIT LAURENT |
分类号 |
G01S19/02;H04B7/185;G01S1/00;H03H7/30;H03H7/40;H03K5/159 |
主分类号 |
G01S19/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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