| 摘要 |
PROBLEM TO BE SOLVED: To suppress range ambiguity and Doppler ambiguity in target position detection.SOLUTION: Reception parts 11, 21 generate a direct wave signal and a reflection wave signal from a direct wave and a reflection wave, respectively. An FT part 13 performs Fourier transform of a direct wave signal and a reflection wave signal divided in each first block by a first division part 12, and an FT part 23 performs Fourier transform of a direct wave signal and a reflection wave signal divided in each second block by a second division part 22. Multiplication parts 14, 24 generate first arithmetic data and second arithmetic data by multiplying results of Fourier transform of the reflection wave signals by a complex conjugate of results of Fourier transform of corresponding direct wave signals, and inverse FT parts 15, 25 calculate a cross-correlation function by performing inverse Fourier transform of the first arithmetic data and the second arithmetic data. Integration parts 16, 26 generate a first cross-correlation result and a second cross-correlation result by overlapping the cross-correlation function on a time domain, and a combination part 17 detects a position and speed of a target 40 on the basis of the first cross-correlation result and the second cross-correlation result. |
