A multifunction millimeter-wave system ( ) that provides simultaneous and prioritized active radar protection and surveillance, high digital data rate communications, interceptor missile guidance, passive surveillance and IFF interrogation for a military vehicle. The system ( ) includes a multi-function control computer ( ) that provides high level control functions. The system ( ) also includes a plurality of azimuth sector sub-systems ( ), each including a steerable antenna ( ) that directs a millimeter-wave beam to a particular location within the area covered by the sector sub-system ( ). Each sector sub-system ( ) also includes an FPGA-based modem ( ) that performs digital signal processing for the various system operations, such as signal modulation and demodulation. Each sector sub-system ( ) also includes an IF/RF transceiver ( ), including a direct digital synthesizer ( ), for providing signal tuning and frequency up-conversion and down-conversion.
Mobile Communication Units That Display Connectivity Loss Boundaries
Northrop Grumman Systems Corporation - Falls Church VA
International Classification:
H04M 11/00
US Classification:
455421, 4554221, 455423, 4554561, 455457
Abstract:
A mobile communication unit is provided that employs a propagation algorithm to determine connectivity loss boundaries that define connectivity loss regions based on one or more forward projected position vector paths of the mobile communication unit and connectivity data. The mobile communication unit further comprises a map renderer configured to provide map display data that includes the map area data, situational awareness location data and the determined connectivity loss boundaries, and a display configured to display the map display data as a geographical map area with an icon of the mobile communication unit located in a geographic location of the geographical map area and drawn connectivity loss boundaries that define connectivity loss regions in a geographic location of the geographical map area.
A radar system (10) uses independent, adaptive modulation controls for the local oscillators (16, 40) in the transmitter (24) and receiver (26) portions. The adaptive modulation enables the radar to filter out any repeater jammer signal while maintaining a good signal-to-noise ratio (SNR) on the target. The radar system (10) provides a SNR that is sensitive to the target range and minimizes the SNR at the jammer range and maximizes the SNR at the target range. A communication system (60) similarly uses independent, adaptive modulation controls (66, 84) to provide a communication system resistant to jamming.