SDPSK的调制与解调

详细分析SDPSK（Symmetrical DPSK）的调制特性，提出一种基带编解码方法及定时同步方法。基带编解码器由开关、延时单元和逻辑运算单元构成，不涉及复杂运算；而定时同步方法，直接通过基带信号运算得到同步时钟，不需要锁相环，运算量小。因此，所提出的基带编解码方法和定时同步方法非常适合硬件实现。仿真结果验证了算法的正确性。另外，通过对解调器性能的测试，分析了算法的局限性及应用范围。

Modulation and Demodulation of SDPSK

The modulation characteristics of the SDPSK signal are analyzed and the methods of base-band coding-decoding and timing synchronization proposed. elements and logic elements. And the timing clock is and the PLL （phase lock loop） is not needed. So the The dir pro The simulation results show that the methods are correct base-band coder/decoder consists of switches, time delay ec po In tly sed generated through operating the base-band signals methods are adaptable to hardware implementation addition, the performance of the demodulator is tested and the limtation and application scope are discussed.