(6) There is also an
antijam Have Quick capability as well as the ability to passively monitor the guard frequency.
A method that adapts bandwidth of delay locked loop (DLL) to carrier to noise intensity ratio (C/N0) was proposed to handle high interference or weak signal environment and it indicated improvement in
antijam margin over an INS/GPS with fixed bandwidths [7], but carrier tracking loop, that is, phase locked loop (PLL), is not considered.
Furthermore, simple logic would tell us that, if it is known that an attack on our strategic
antijam main asset, AEHF, is tantamount to an act of war, extending the use of that same asset to provide secure coverage for both tactical and strategic forces would make the tactical support more secure simply by being on the same strategic asset.
In an indirect response, Thales Avionics in France produces the Topshield
antijam solution for helicopters.
Compared to earlier analogue technology, it provides significantly more GPS
antijam protection against complex jamming scenarios and has been modified for an extended mean time between failures.
SMART-T--Secure Mobile
Antijam Reliable Tactical Terminal
Everywhere we stopped, our communications sergeant spent a lot of time setting up the single-channel
antijam man-portable (SCAMP) terminal and attempting to establish effective communications, only to learn later that the host network SCAMP terminal was not set up.
Session III will be chaired by Mark Youhanaie, Raytheon, and will address "Overview of the Threat Response." Briefings will include "Electronic Protection, Support, and Attack and Increased SV Signal Power" by Kyle Sperry, Overlook; "Inertial Navigation via MEMS IMUs and Deep Integration" by Tony Abbott, Aerospace Corp.; "Adaptive Processing Antilam Solutions -- Low Cost Analog to High Performance Digital" by David Lewis, Raytheon; "Miniature Antenna Arrays" by Alan Babich, SPAWAR System Center, and Allen Morrison, SAIC; and "
Antijam Test Experience" by Col James Greenlee, JGPSCE.
Such systems are being considered as part of IMT2000 (third-generation wireless systems), and are also of particular interest for defense applications because of their
antijam and low probability of intercept features.
Recently, [12] drew the attention on suppressing the multiple interferences according to their direction of arrival (DOA) and power by using an open-loop
antijam approach.
These radios provide
antijam, secure communications links for joint task forces and Army aviation missions.
Many future space systems will require satellite-based active antenna arrays at mm-wavelengths to provide rapid beam steering and
antijam capability, as well as to provide spatial combining of the outputs of low power, solid-state sources.