Method for HPRF-radar measurement

US6686871B2 · kind B2 · utility

Assignee

• EADS Deutschland GmbH · DE

Inventors

• Hermann Rohling · Wolfenbüttel, DE
• Wilhelm Guener · Ulm, DE
• Hans Hommel · Baindt, DE
• Dieter Nagel · Des Plaines, US

Key dates

• Filing date: Nov 25, 2002
• Grant date: Feb 3, 2004
• Expiry date: Nov 25, 2022

Classification

• Technology area (CPC G): Physics
• CPC primary: G01S7/2883
• WIPO field: Measurement
• WIPO sector: Instruments

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 &phgr;1n (greater than zero) from pulse to pulse with &phgr;1n≧0, while the pulses of the second pulse sequence have a linear increasing phase value with a fixed phase difference &phgr;2n which differs from &phgr;1n. 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 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 …