Calls from 24 satellites running Global Positioning System (GPS) services are more expensive than calls to help you find the nearest gas station. From ground missions to missile systems, the military relies on GPS. The military’s dependence on GPS is so high that its staff and agencies warn that GPS may become a single point of failure. If the system fails, the armed forces will routinely not conduct GPS exercises. The global civilian life relies on GPS more than we realize.
Although these 24 satellites may fail due to various technical reasons, there are also concerns that adversaries using jamming technologies may block access to GPS. Such attacks will affect critical applications of civilian infrastructure (power grids and GPS-based ATM networks) and will severely disrupt military operations. In the past few years, a team from the Aerospace Communication System Implementation Department has developed blind jamming signal suppression (BLISS) technology, which aims to eliminate potential jamming signals and thereby interfere with GPS reception.
Since the strength of GPS signals on the earth is very low, the GPS signals received by users on the ground are easily blocked. On the battlefield, the enemy can deliberately block GPS to prevent soldiers from knowing their exact location. There are records of cases in which gps jammer purchased on the Internet refuse location information throughout the country. Specifically, although man-made jammers are illegal, they are easy to obtain and have been used to circumvent GPS tracking technology.
Dr. Philip Dafesh, one of the architects of BLISS, said: “BLISS uses a set of proprietary algorithms to estimate the specific characteristics of high-power jammers, which can mitigate the effects of various strong jammers.” BLISS can be implemented with existing receivers , As an independent device between the GPS receiver and its antenna, it can also be integrated into the future receiver chipset.
BLISS is effective against multiple interference types
There are well-known techniques for suppressing interference, which focus on eliminating narrow-band interference on a small frequency range. These techniques will fail when the GPS jammer frequency changes rapidly. Unlike these traditional technologies, BLISS can also effectively combat interference that matches the target signal, and is not affected by interference that quickly changes frequency or phase characteristics.
Military GPS receivers used in this field.
This technology has shown great promise and has been licensed by Orolia’s subsidiary Talen-X, which specializes in the production of precision time and frequency products for solving global navigation satellite system problems. The research and development of BLISS was initially funded by the Aerospace Innovation Laboratory (iLab), which aims to encourage engineers to explore innovative solutions to the problem of space capacity. BLISS is an example of how to transform ideas generated in iLab into real solutions. Dr. Esteban Valles, Director of the Digital Communication Implementation Department, said: “We have a very talented and diverse staff who use cutting-edge technologies in many fields to create and deliver operational proofs of concept equipment such as BLISS.”