基于DSP的π/4-DQPSK调制解调器的实现

Implementation of π/4-DQPSK Modem Based on DSP

介绍了一种广泛应用于移动通信、卫星通信中的π/4-DQPSK调制解调技术。给出了一种易于DSP实现的π/4-DQPSK调制解调器的算法,相比于相干解调算法,该算法计算量小,在实际信道中测试性能好,同时该算法减少了硬件实现的难度。利用蒙特卡罗方法对该方案进行了仿真,并给出了理论和仿真的误比特率曲线。实验表明该算法执行效率高,能够满足实际通信系统对调制解调器的要求。

The π/4-DQPSK modem technology which is widely used in mobile communication and satellite communication is introduced. An algorithm which is easy using DSP to implement is given. Comparing to coherent algorithm, this one has lower calculation, the performance is good in realtime channel and the hardware design is easy. This paper gives the Monte Carlo simulation about this project, and shows the BER curve of the theoretical and experimental consequence of this project. It＇s proved that this algorithm is high efficiency and it＇s good enough to fulfill the demand of realtime communication system.