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IEICE Technical Report; IEICE Tech. Rep.

Wireless Security Schemes using Random Phases for MISO-OFDM Communications

Kaikai Huang, Kazuhiko Fukawa, Yuyuan Chang

Published Aug 10, 2015• 0 citations
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This paper studied physical-layer MISO-OFDM (Multiple Input Single Output) secure communication with random phases in transmitter. Channel estimation error caused by OFDM pilot symbol transmission was discussed and overall transmission power was minimized by amplitude adjustment of transmitted signals under 16QAM modulation. Moreover, mathematical expression of security rate between legitimate channel and wire-tap channel was derived and how number of transmitter antennas Nt, correlation factor p and CNR (carrier to noise ratio) will influence actual security rate was investigated and illustrated by simulation in our proposal.

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Spatial signature for secure MISO‐OFDM systems

Berna Özbek, Güneş Karabulut Kurt

Physical layer security is a promising approach to establish secure communications based on the characteristics of wireless channels. A spatial signature based secure multiple‐input single‐output (MISO) orthogonal frequency division multiplexing (OFDM) system is proposed to disrupt the reception of a passive eavesdropper by holding two practically relevant assumptions: a limited feedback link for legitimate node and the unavailability of channel state information of eavesdropper. The proposed algorithm achieves a higher average secrecy rate than the conventional secure MISO‐OFDM systems in presence of a limited feedback link.

Electronics Letters•Mar 13, 2018•1 citation
This paper studied physical-layer MISO-OFDM (Multiple Input Single Output) secure communication with random phases in transmitter. Channel estimation error caused by OFDM pilot symbol transmission was discussed and overall transmission power was minimized by amplitude adjustment of transmitted signals under 16QAM modulation. Moreover, mathematical expression of security rate between legitimate channel and wire-tap channel was derived and how number of transmitter antennas Nt, correlation factor p and CNR (carrier to noise ratio) will influence actual security rate was investigated and illustrated by simulation in our proposal.
Physical layer security is a promising approach to establish secure communications based on the characteristics of wireless channels. A spatial signature based secure multiple‐input single‐output (MISO) orthogonal frequency division multiplexing (OFDM) system is proposed to disrupt the reception of a passive eavesdropper by holding two practically relevant assumptions: a limited feedback link for legitimate node and the unavailability of channel state information of eavesdropper. The proposed algorithm achieves a higher average secrecy rate than the conventional secure MISO‐OFDM systems in presence of a limited feedback link.