Bistatic Denial Using Spatial-Temporal Coding
Abstract
This report describes work performed on the design of waveforms emitted by an airborne radar, such that the radar cannot be used by an adversary as a coherent reference for a bistatic radar system. This is accomplished by radiating, in addition to the conventional radar signal, another signal or set of signals, coded so as to be distinguishable from the conventional radar signal, and radiated via different radiation pattern(s) to the conventional radar signal. Thus, in the direction in which the radar operates the masking signal will be suppressed both by the radiation pattern with which it is radiated in that direction, though an adversary will detect a combination of the radar signal and the masking signal, such that he cannot correctly distinguish the radar signal. The investigation included a spatial coding technique based on orthogonal beams from a linear antenna array fed by a Butler Matrix. A simulation code was developed to calculate and plot the auto- and cross-ambiguity functions of arbitrary signals. The results indicate that the level of the masking signal received outside the main beam of the radar signal pattern should be adequate to deny a coherent reference.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 2001
- Accession Number
- ADA389603
Entities
People
- Hugh Griffiths