基于FDM的多进制多用户DCSK

Multiple ary multiple user DCSK based on FDM

基于传统的多用户差分混沌移位键控(differential chaos shift keying,DCSK),本文提出一种新型的多进制多用户DCSK混沌扩频通信方案。该方案在发送端将二进制码元转换为多进制码元,极大提高了二进制码元的传输速率,并利用频分复用实现多用户传输。接收端将所有用户参考信号合并作为新的参考信号,分别与各个用户进行相关解调。仿真结果表明,增加用户数可以有效改善多进制多用户DCSK系统的误码性能,该方案具有一定的实际应用价值。

A novel chaotic spread spectrum communication scheme is proposed, which is multiple ary multi- ple 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.