Military Communications and Information Technology: A Trusted ...

78 Military Communications and Information Technology...
B. Jammer capabilieties:
• tuning time of an upconverter, required less than 1 ms;
• reaction time (memory access, switching time between waveforms) of an exciter;
• D/A converters quality, required 16 bit resolution;
• power amplifier, resistant to high temperature;
• utilization of switched RF filters on the amplifier output for protection of friendly
communications systems;
• selective jamming, required time synchronization and exact frequency channel
matching.
C. Propagation, terrain type and fading influence:
• jammer antenna height, placement and its impact on protection range;
• RCIED antenna placement and its impact on jamming effectiveness in fading
environment [7];
• ground conductivity factor, unfavorable in dry rough terrain;
• link budget (including height, gain of antennas and effective radiated power).
V. RCIED jamming system conception
Taking into consideration previously discussed aspects, a concept of automated,
self-contained RCIED jamming system is based on guidelines:
• simultaneous multi-band spectrum monitoring and simultaneous multi-band
reactive and barrage jamming of detected signals;
• simultaneous multi-band detection, classification and measurement of signal
parameters using programmable FPGA hardware and DSP support;
• utilization of filter block for protection of friendly forces communications;
• cooperation of multiple RCIED jamming devices in a network;
• user programmable interface for frequency preservation and a jam planning;
• limited dimensions and weight that allow installation on various types of vehicles.
At MCI counter RCIED solution is developed which consists following stages:
1. designing and developing receiver block and validation of its performance
and accuracy;
2. designing and developing transmitter block and its integration with a receiver
block and a controller;
3. integration and testing also in a cooperative sensor/jammer network.
Previously effective data processing algorithms for target acquisition and
identification were developed. It was done using data from commercial wideband