Abstract:

A novel chaotic spread spectrum communication scheme is proposed, which is multiple ary multiple user differential chaos shift keying (MAMU-DCSK), it is based on traditional multi-user differential chaos shift keying. The scheme converts the binary symbols to multiple ary symbols at the transmitter, which greatly raises the transmission rate of binary symbols, and uses frequency division multiplexing to realize multi-user transmission. At the receiver, the reference signals of all users are combined as new reference signals which are non-coherent demodulated with each user respectively. The simulation results show that increasing the number of users can improves the system error performance of MAMU-DCSK effectively, and the scheme shows some practical value.