MIMO Based Eigen-Space Spreading

摘要

In this work, Pulsar leveraged the multiple input multiple output (MIMO) concept to achieve anti-jamming and low probability of detection/interception (AJ/LPI/LPD) communications. The proposed work randomizes the signal in space, as well as time and frequency. Space randomization will be achieved by transmitting on the spatial singularities of the MIMO matrix channel. Combination of this powerful technique with orthogonal frequency division multiplexing (OFDM) based modulation and traditional time and frequency spreading techniques results in a highly secure mode of communications. The results show that for LPD, almost 20 dB reduction in overall TX power can be achieved for the same performance at 5% outage when going from a single antenna system to an 8 antenna system. Moreover, our results show that the eigen vector spreading concept is complementary and additive to conventional spread spectrum techniques such as frequency hopped spread spectrum and direct sequence spread spectrum.