Chaotic MIMO — Spatial Diversity Techniques for DCSK Modulation

J.L. Lagunas Morales and S. Roy (Canada)


Chaos, chaotic communications, CSK, DCSK, MIMO, spectral efficiency.


In this paper, we present three techniques that provide spa tial diversity to a Differential Chaos Shift Keying (DCSK) chaotic transceiver. The system transmits and receives chaos-based modulated signals through multiple antennas. We show that Multiple-Input Multiple-Output (MIMO) systems greatly improve the BER performance of chaotic communications over the Rayleigh channel, achieving for M = 2 antennas a gain of up to 8 dB.The spectral effi ciency is analyzed as well in terms of users, spreading gain and signal-to-noise ratio.

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