发明名称 |
Method and system of generating a modulated chirp signal |
摘要 |
A method and system generates a modulated chirp signal in accordance with the present invention. A phase-locked loop output signal is generated, together with a sampled feedback signal from a voltage controlled oscillator. The sampled feedback signal is received within a quadrature I/Q phase modulator. I/Q quadrature signals are generated from an I/Q generator circuit to the quadrature I/Q phase modulator to produce a desired modulation of a sampled feedback signal as a string of +/-90 degree phase shifts to create a desired offset at the voltage controlled oscillator. The I/Q quadrature signals are chirp modulated and the resultant phase-locked loop output signal is chirp modulated by the chirp signal that comprises a sequence of chirps having a reference chirp followed by a plurality of data chirps.
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申请公布号 |
US6549562(B1) |
申请公布日期 |
2003.04.15 |
申请号 |
US19990439971 |
申请日期 |
1999.11.12 |
申请人 |
HARRIS CORPORATION |
发明人 |
OLAKER DAVID A.;OTTO JAMES C.;FILLION JAMES R. |
分类号 |
H04B1/69;(IPC1-7):H04B1/69 |
主分类号 |
H04B1/69 |
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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