分形调制的硬件实现方案

Hardware Implementation Scheme for Fractal Modulation

以Mallat算法和多相滤波器为基础,提出了一种分形调制和解调系统的硬件实现方案,对成形和同步系统进行了综合设计。针对同步中对定时精度敏感,易假同步等弱点,在最大似然估计算法的基础上采取了载波相位恢复与码元帧同步相结合的方式,同时也可以对假同步进行检测和纠正。仿真和测试的结果表明,该方案在信噪比为10 dB的条件下,能使单个子带的误码率达到10-5数量级。

This paper proposes a hardware implementation scheme for the fractal modulation and demodulation system based on Mallat algorithm and polyphase filter, and the shaping and synchronization system are also designed. According to the weakness of false synchronization and high sensitivity to timing error, the carrier phase recovery is combined with frame synchronization on the basis of maximum likelihood （ML-） estimation, and at the same time the false synchronization can be detected and corrected. The simulation results indicate that the scheme is feasible and effective.