Chaotic Communications in MIMO Systems
ICESS '07 Proceedings of the 3rd international conference on Embedded Software and Systems
M-DCSK-based chaotic communications in MIMO multipath channels with no channel state information
IEEE Transactions on Circuits and Systems II: Express Briefs
From theory to practice: an overview of MIMO space-time coded wireless systems
IEEE Journal on Selected Areas in Communications
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his paper, we consider chaotic digital communications in Single Input Single Output (SISO) and Multiple-Input-Multiple-Output (MIMO) wireless multipath Nakagami channels. We focus on a single user system that employs M-ary Differential Chaos Shift Keying (M-DCSK). We consider a transceiver scheme, which requires no channel state information at either the transmitter or the receiver. SISO system employs a distinct chaotic sequence at the transmit antenna to spread the data symbols and transmit omnidirectionally, whereas MIMO system employs a distinct chaotic sequence at each transmit antenna to spread the same data symbols and transmit omnidirectionally. In MIMO systems, at the receiver, differential detection statistics is performed for each receive antenna, and these statistics are then combined with equal gain combining and maximum ratio combining for symbol detection. System performance is calculated in terms of the Bit Error Rate for various space diversity levels and average SNRs. Performance comparison for SISO and MIMO systems is performed. Also, the performance of the system is evaluated for various chaotic sequence lengths.