Method for HPRF-radar measurement

Abstract

In a method for HPRF-radar measurement of the range and Doppler frequency of at least one target, a transmit signal is generated which consists of two pulse sequences that are interleaved on a pulse to pulse basis, and have the same pulse repetition frequency PRF and the same transmit frequency. The pulses of a first one of the two pulse sequences have a linearly increasing phase value with a fixed phase difference φ1n (greater than zero) from pulse to pulse with φ1n≧0, while the pulses of the second pulse sequence have a linear increasing phase value with a fixed phase difference φ2n which differs from φ1n. The two received base band signals of each individual pulse sequence are Fourier transformed, and the amplitude peaks of the resulting two Fourier spectra are determined. The amplitude peaks of the two Fourier spectra are then clustered to determine pairs of spectral lines of a Doppler frequency shift of 1 Δ ⁢ ⁢ f = ϕ 2 ⁢ n - ϕ 1 ⁢ n 2 ⁢ π · PRF . The target Doppler frequency is calculated based on two Doppler frequencies of a previously determined spectral line pair, and the target range is calculated based on the phase difference between the two spectral lines of a previously determined spectral line pair.

Dependencies are inferred from the claim text.