Title:
【発明の名称】ランダムFSK波形付車両衝突レーダー
Document Type and Number:
Japanese Patent JP2002513468
Kind Code:
A
Abstract:
An automotive radar incorporates a repetitive randomized equivalent LFM sequence of frequencies for improved immunity to jamming from other automotive radars. Each frequency in the sequence is of sufficient duration to travel round trip over the detection range of the radar. The Doppler shift in the received signal is estimated by performing a spectral analysis on similar frequency components of the received signal, and is then removed from the entire received signal. The received signal is then reordered so as to form an equivalent LFM received signal, and is compared with a similarly reordered image of the transmitted signal so as to estimate the range to the target. The randomization sequence, initial start frequency, or initial start time of the repetitive sequence are varied to minimize the effects of jamming by other radars, and this variation can be directionally dependent.
Inventors:
Farmer, Michael Edward
Application Number:
JP53471898A
Publication Date:
May 08, 2002
Filing Date:
January 17, 1998
Export Citation:
Assignee:
Automotive Systems Laboratory Inc.
International Classes:
G01S13/38; G01S7/36; G01S13/34; G01S13/42; G01S13/536; G01S13/931; B60R21/01; B60R21/0134; G01S7/35; G01S13/02; (IPC1-7): G01S13/38; G01S13/93
Attorney, Agent or Firm:
Kiyokazu