Browse Prior Art Database

Processing the Echo From Range-Dependent Multiplexed Pulses in Range-Doppler Radar

IP.com Disclosure Number: IPCOM000059990D
Original Publication Date: 1986-Feb-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 45K

Publishing Venue

IBM

Related People

Feig, E: AUTHOR

Abstract

Present radar systems cannot assign radial velocities to targets which are clustered in the range-Doppler plane. This article describes a range-dependent multiplexed pulse for a radar to transmit and how to process the echo created by such a pulse when it is reflected by a cluster in the range-Doppler plane. The range-dependent multiplexed transmitted pulse is described as follows: (Image Omitted) Next, compute the Fourier transform of E(t). It can be shown to be of the form where U denotes the Fourier transform of U. Since we assume that the targets are clustered in the range-Doppler plane, the yj are clustered and the fk are very far apart. Furthermore, the signal is constructed so that U is narrow banded.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 84% of the total text.

Page 1 of 2

Processing the Echo From Range-Dependent Multiplexed Pulses in Range- Doppler Radar

Present radar systems cannot assign radial velocities to targets which are clustered in the range-Doppler plane. This article describes a range-dependent multiplexed pulse for a radar to transmit and how to process the echo created by such a pulse when it is reflected by a cluster in the range-Doppler plane. The range-dependent multiplexed transmitted pulse is described as follows:

(Image Omitted)

Next, compute the Fourier transform of E(t). It can be shown to be of the form where U denotes the Fourier transform of U. Since we assume that the targets are clustered in the range-Doppler plane, the yj are clustered and the fk are very far apart. Furthermore, the signal is constructed so that U is narrow banded. Thus, the various summands in the expression for E(s) do not overlap, and we can determine each of them,

(Image Omitted)

We next compute the Fourier inverse Ek(t) of each of these and divide them by a phase factor yielding This system of equations is well conditioned because of our choice for the fk, so we can solve for 2fiyjt Hj(t) = U(t+xj) e In effect, we have isolated that portion of the echo contributed by a single target. The procedure now follows the standard matched- filter method for radar detection, which is well known to yield range and Doppler information for a single target. Thus, we form the time averages of the Hj's with all "possible echoes" yielding

(Image Omi...