This research aims to present accurate computer models of a
communication link and a Super High Frequency (SHF) radio
communication system. Network Warfare Simulation (NETWARS) is a J-6
initiative aimed at modeling all communication traffic in the
Department of Defense (DoD) for testing and analysis of specific
real world scenarios. The AN/TSC-94 is a SHF radio system with
satellite communication capabilities. The AN/TSC-94 incorporates a
Direct Sequence Spread Spectrum (DSSS) radio link for certain
Anti-Jam (AJ) features. A DSSS 'spreads' signal power over a large
bandwidth, reducing power previously concentrated within the
original system bandwidth. The simulations were performed using
OPNET. Simulation results show DSSS lowered Bit Error Rate (BER)
over links not using spread spectrum. Results show that in the
presence of multiple jamming forms, the DSSS link performed without
bit errors while the normal (non-DSSS) link was disrupted by the
jammer, experiencing BER's of up to 0.43. The AN/TSC-94 was able to
defeat the jammer using the DSSS link. By performing in normal mode
during unjammed scenarios, and switching to AJ mode in the presence
of a hostile transmitter, the AN/TSC-94 demonstrated its ability to
successfully communicate in multiple access and hostile
environments.
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