发明名称 |
Radar for detecting a target based on a frequency component |
摘要 |
In a radar, a coupler extracts a part of a transmission signal as a local signal and a mixer mixes a reception signal from a circulator and the local signal so as to output an intermediate frequency signal which is the frequency difference between the transmission signal and the reception signal. An IF-amplifying circuit amplifies the intermediate frequency signal and an AD converter converts the signal to digital data. A DC-removing unit removes a DC component by subtracting the average from the data and an FFT operation unit performs fast Fourier transform so that the distance to a target and the relative velocity of the target are calculated based on a peak included in the frequency spectrum.
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申请公布号 |
US6795012(B2) |
申请公布日期 |
2004.09.21 |
申请号 |
US20020157660 |
申请日期 |
2002.05.29 |
申请人 |
MURATA MANUFACTURING CO. LTD. |
发明人 |
NAKANISHI MOTOI;ISHII TORU;NISHIMURA TETSU |
分类号 |
G01S7/02;G01S7/35;G01S13/34;G01S13/58;G01S13/93;(IPC1-7):G01S13/93 |
主分类号 |
G01S7/02 |
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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