3-D Spread Spectrum Communication for High Threat Environments

Multiple input multiple output (MIMO) systems have attracted a large amount of research since their introduction in the mid 1990s by Gans and Foschini, boasting several orders of magnitude improvement in capacity relative to current technologies. However,the ongoing research focuses on the application of MIMO to data communications. The creative research space of applying MIMO architectures to achieve high bit rate, anti-jamming, low probability of detection/interception (AJ/LPI/LPD) systems suitable formilitary applications has been largely ignored. We strongly believe that an architecture combining a MIMO structure with direct sequence spread spectrum (DSSS) and orthogonal frequency division multiplexing (OFDM) techniques is the best architecture toprovide sufficient flexibility and robustness to meet the demands of modern military systems. LPI/LPD communication is enhanced due to the three dimensional randomization process in the MIMO-OFDM-DSSS algorithm. Data randomization occurs in space,frequency and time via MIMO, OFDM and DSSS, respectively. Furthermore, MIMO provides interference suppression capabilities for additional AJ protection and increases the data throughput by several orders of magnitude, which will prove invaluable in thefield.SiComm is uniquely poised to leverage the extensive MIMO experience existing within its staff to develop a next generation modem for high threat environments.