发明名称 |
Radar system using a cell averaging constant false alarm rate device |
摘要 |
A cell averaging (CA) constant false alarm rate (CFAR) device for use in a radar system which filters noise and clutter from a signal containing a plurality of range cells. A moving window average calculator (MWAC) calculates a moving window average (MWA) for each range cell in a signal. A central processing unit (CPU) estimates a skew factor of a probability density function (PDF) and calculates an offset factor based on information contained in the signal. A multiplying device multiplies the offset factor by the MWA calculated for each range cell and creates a second signal containing a plurality of range cells. A comparator compares each range cell of the second signal to each corresponding range cell of the original signal, selects a the larger value of the two signals, and creates a third signal which is essentially free of noise and clutter.
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申请公布号 |
US5808579(A) |
申请公布日期 |
1998.09.15 |
申请号 |
US19960772668 |
申请日期 |
1996.12.20 |
申请人 |
NORTHROP GRUMMAN CORPORATION |
发明人 |
RADEMACHER, PAUL E. |
分类号 |
G01S7/12;G01S7/292;G01S7/295;(IPC1-7):G01S7/292;G01S7/34 |
主分类号 |
G01S7/12 |
代理机构 |
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代理人 |
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地址 |
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