发明名称 |
Phase measurements using pseudo-random code |
摘要 |
Signal phase delay may be accurately measured by transmitting a pseudo-random noise coded reference signal, deriving in-phase and quadrature components of the received coded signal and then separately decoding the in-phase and quadrature components. This technique effectively compresses the transmitted signal pulse to a very narrow width (thereby simplifying discrimination of separate pulses with similar arrival times) while magnifying the pulse amplitude (thereby enhancing the signal to noise ratio).
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申请公布号 |
US4933916(A) |
申请公布日期 |
1990.06.12 |
申请号 |
US19850794086 |
申请日期 |
1985.11.01 |
申请人 |
CANADIAN PATENTS AND DEVELOPMENT LIMITED;SOCIETE CANADIENNE DES BREVETS ET D'EXPLOITATION LIMITEE |
发明人 |
MAY, GEORGE A.;FARMER, DAVID M. |
分类号 |
G01S11/02;G01S11/14;G01S19/48 |
主分类号 |
G01S11/02 |
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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