基于IP集成的RS码+DQPSK系统设计

Design of RS code+DQPSK system based on IP core's Integration

本文利用Altera公司开发的RS、NCO和FIR IP core以及Simulink、DSP_Builder中的模块快速搭建了一个RS(204,188)+DQPSK的低中频调制解调系统。分别在Simulink、Modelsim中验证了系统的功能,最后在Altera公司的Stratix II EP2S60DSP开发板中实现了该系统,并对系统进行了测试。试验结果表明DQPSK系统加入RS码后,在Pe=1e-3时,RS(204,188)编码可以带来3￣4dB的增益。

In this paper, we use Altera corporation＇s RS、NCO、FIR IP core and some modules in the Simulink、DSP_Builder, fast build a low intermediate frequency RS （204,188） ＋DQPSK modulation/demodulation system, validating the system＇s function in Simulink and Modelsim environment , finally implementing the system in Stratix Ⅱ DSP development board and testing the system . Simulation results show that RS （204, 188） coding gain of this scheme can achieve 3-4dB at bit error rates around 1e- 3 compared with the uncoded DQPSK.