基于量子计算方法的多址DCSK通信系统的研究

为了降低多用户之间的干扰问题，提出了一种新的混沌多址通信系统（多比特MA-DCSK），并设计了该系统的多用户检测算法。通过仿真实验，比较了该多比特MA-DCSK系统与可变延时MA-DCSK系统的误码率性能，证明了该系统具有更低的误码率。利用量子并行运算的特性，采用Grover量子算法解决多用户检测算法的计算复杂度，这种算法可以将复杂度从 降低到 。仿真结果表明，在不影响系统性能的同时，量子算法可以有效地降低计算复杂度。

Multiple access DCSK communication system based on quantum computing method

In order to reduce the interference among multiple users, a new system (multi-bit MA-DCSK) of chaotic multiple access communication is proposed, and the multi-user detection algorithm is designed for it. Through the simulation, the bit error rate (BER) of the multi-bit MA-DCSK system is compared with the variable delay MA-DCSK (VDMA-DCSK), and the result proves the new system has lower BER. By making use of the parallelism computation characteristic of quantum, the Grover quantum algorithm is used to solve the computational complexity of the multi-user detection algorithm, and it can reduce the computational complexity from to . The simulation result shows Grover quantum algorithm can effectively reduce the computational complexity without affecting the performance of the system at the same time.