In order to improve the data rate and energy efficiency of permutation index differential chaos shift keying(DCSK),a high rate permutation index DCSK communication system is proposed.The system uses a permutation matrix to index the multi-ary information and carry a modulation bit.The transmitter replicates the reference signal P times as the information bearing signal,then transmits N more user information in each time slot through Hilbert transform,and cascades the signal to orthogonal frequency division multiplexing system for orthogonal carrier modulation,which greatly improves the data transmission rate of the system.At the some time,the bit error rate(BER)expressions of the system are derived for Gaussian white noise channel and multipath Rayleigh fading channel,and the theoretical analysis and simulation results prove that the system has good characteristics of high speed and low BER compared with other permutation index type systems and better application prospects.
关键词
差分混沌移位键控/高速/正交频分复用/置换矩阵/希尔伯特变换
Key words
differential chaos shift keying(DCSK)/high rate/orthogonal frequency division multiplexing(OFDM)/permutation matrix/Hilbert transform
维普
万方数据