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Application areas Secure communications / Military communications / UAV control & telemetry systems / Wireless sensor network
Assignments • Signal hiding below noise level (-12/-24dB +digital noise supress.) • Electronic countermeasures resistance providing (~30dB).
Performances
At bandwidth of ΔF = 1MHz
Data Rate R, kbps Link Power Gain W, dB ~9,7 30
~10,7 27 ~21,4 24
Advantages over analogues / prototypes Analogue / Prototype techniques: IEEE 802.11b, GPS. Advantages: • Each next data symbol is transmitted by different orthogonal
spreading sequence • Fast changing of channel coding algorithm • Does not require other encryption techniques • Does not require outer synchronization channels • Does not require carrier signal acquiring • Allowable absolute frequency instability δf = 0,78х10-6
Current project state Completed steps • MATLAB simulation software is developed • Prototype on basis of SDR USRP2 (N210) is realized (+GNURadio) Current steps: • Hardware making • Code transforming to VHDL for FPGA and С/С++ for DSP
Potentials, capabilities Capabilities: • Resistance to all known ECM systems • Hiding signal transmission in 90% of covered area • Data rates up to SD video 360p H.264. (20MHz BW)
Potential improvements: • Synchronization algorithms • Orthogonal spreading sequences • Fast orthogonal transform algorithms
see you at
MAKEITSHOW
festival of innovation
27-28 JUNE 2015
http://makeitshow.com.ua