Multiuser Chaos Communication Through Polyphase Spreading for Overlay Cognitive Radio – Wright State University

TY – GEN

T1 – Multiuser Chaos Communication Through Polyphase Spreading for Overlay Cognitive Radio

AU – Sundersingh, Dan

AU – Ma, Yao

AU – Chakarvarthy, Vasu

AU – Wu, Zhiqiang

N1 – Publisher Copyright:
© 2012 IEEE.

PY – 2012

Y1 – 2012

N2 – Chaos communication systems have received strong interest due to its performance and security advantages such as robustness in multi-path fading environments, resistance to jamming, and low probability of interception. With recent advances in cognitive radio, it is highly desired to combine the security advantages of chaos communication with the flexibility of cognitive radio to create a chaos based cognitive radio communication system that improves the spectrum usage while maintaining high security features. In this paper, we propose a multi-user non-continuous orthogonal frequency division multiplexing (NC-OFDM) based chaotic communication system employing orthogonal polyphase spreading codes. Specifically, a polyphase spreading code called carrier interferometry code is layered onto the frequency domain chaotic waveform to create multi-user support. The proposed system not only maintains the capability of operating over multiple non-contiguous spectrum holes, but also offers security features by chaos sequence modulation. For comparison purposes, we develop two benchmark schemes using both NC-OFDM and chaos modulation. Simulation results show significant performance advantage of the proposed scheme than the benchmark schemes. Finally, we point out that the proposed scheme allows flexible access control for different users and groups, in broadcast, multicast and unicast services.

AB – Chaos communication systems have received strong interest due to its performance and security advantages such as robustness in multi-path fading environments, resistance to jamming, and low probability of interception. With recent advances in cognitive radio, it is highly desired to combine the security advantages of chaos communication with the flexibility of cognitive radio to create a chaos based cognitive radio communication system that improves the spectrum usage while maintaining high security features. In this paper, we propose a multi-user non-continuous orthogonal frequency division multiplexing (NC-OFDM) based chaotic communication system employing orthogonal polyphase spreading codes. Specifically, a polyphase spreading code called carrier interferometry code is layered onto the frequency domain chaotic waveform to create multi-user support. The proposed system not only maintains the capability of operating over multiple non-contiguous spectrum holes, but also offers security features by chaos sequence modulation. For comparison purposes, we develop two benchmark schemes using both NC-OFDM and chaos modulation. Simulation results show significant performance advantage of the proposed scheme than the benchmark schemes. Finally, we point out that the proposed scheme allows flexible access control for different users and groups, in broadcast, multicast and unicast services.

KW – chaos modulation

KW – Cognitive radio

KW – NC-OFDM

KW – Modulation

KW – Chaotic communication

KW – Benchmark testing

KW – Peak to average power ratio

UR – www.scopus.com/pages/publications/84962129158

UR – www.scopus.com/inward/citedby.url?scp=84962129158&partnerID=8YFLogxK

UR – corescholar.libraries.wright.edu/ee/100

U2 – 10.1109/WDD.2012.7311271

DO – 10.1109/WDD.2012.7311271

M3 – Conference contribution

SP – 197

EP – 202

BT – 2012 International Waveform Diversity & Design Conference (WDD)

PB – IEEE

T2 – International Waveform Diversity and Design Conference, WDD 2012

Y2 – 22 January 2015 through 27 January 2015

ER –