Abstract
A novel encryption scheme using chaotic Zadoff-Chu matrix transform (ZCMT) precoding is proposed to improve both of the data security and performances in orthogonal frequency-division multiplexing (OFDM) transmission, where the security is significantly enhanced with a huge key space of ∼10400 provided by hyper digital chaos. The chaotic ZCMT matrix is generated with the reconfigurable parameters and row permutation of ZCMT matrix, both of which are predetermined by a hyper digital chaos. The OFDM data encryption using the chaotic ZCMT precoding effectively reduces the peak-to-average power ratio (PAPR) and consequently improves the OFDM transmission performance, if compared with the traditional OFDM transmission. The significant PAPR reduction is numerically analysed via the autocorrelation and the complementary cumulative distribution function (CCDF).
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