【摘要】 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。更多还原

【Abstract】 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.更多还原