Cost-effective method for determining a pulse response of a high-resolution, band-limited radar channel

US5805107A · kind A · utility

Assignee

• Deutsche Forschungsanstalt Fur Luft-Und Raumfahrt E.V. · DE

Inventors

• Arno Schroth · Puchheim, DE
• Tobias Felhauer · Kaiserslautern, DE
• Walter Baier

Key dates

• Filing date: Apr 18, 1997
• Grant date: Sep 8, 1998
• Expiry date: Apr 18, 2017

Classification

• Technology area (CPC G): Physics
• CPC primary: G01S13/934
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

For less expensive estimation the impulse response x.sub.MOS of a high-resolution, band-limited radar channel in a radar station operating with an expanded transmitted pulse a(t), from a received signal e, over which a correlated or uncorrelated additive interference signal n can be superimposed, with the use of knowledge about the spread code c and the use of a channel estimator with which a so-called linear, optimum unbiased estimation of the radar channel impulse response x.sub.MOS is performed in a time range covering M range gates of interest, the linear, optimum estimation in the unbiased channel estimator is modified in such a way that the pulse response x.sub.MOS of the band-limited radar channel is determined according to the basic principle of a multiplication of the sampled received signal e and an inverse estimation matrix A.sub.E.sup.-1. The matrix A.sub.E is formed by the extension of the rectangular matrix represented by the components c.sub.i of the spread code c to form a quadratic matrix that circulates to the right, that is, the modified, optimum unbiased estimation: EQU x.sub.MOS =A.sub.E.sup.-1 e applies for a radar channel.