To combat wiretapping of wireless wideband system, this paper presents a method for wireless wideband system physical layer secrecy in the time domain. The method adds random noise based on weak channel characteristic. First, the transmitter decomposes the nonsingular channel characteristic matrix into
some sub-channels. The sub-channels with strong characteristic are selected to transmit useful information, and weak ones are transformed into a random channel. The signal received by legitimate receivers becomes steady, while the eavesdropper’s turns random. Simulation results show that the method can lower the requirements to the legitimate channel state while decrease SINR at eavesdroppers to keep its error probability high so as to enhance system security.
PANG Hong-wei, JIN Liang, HUANG Kai-zhi, JI Jiang
. Physical Layer Secrecy of Wideband System by Adding Random Noise Based on Channel’s Weak Characteristics[J]. Journal of Applied Sciences, 2013
, 31(3)
: 233
-238
.
DOI: 10.3969/j.issn.0255-8297.2013.03.003
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