基于LDPC编码的QAM调制系统性能研究

Performance of QAM Modulation System Based on LDPC Code

在对QAM调制系统进行深入分析的基础上,发现QAM的高频带利用率是以牺牲其抗干扰性来获得的。为了提高QAM调制系统中数据传输的质量,降低误码率,将LDPC编码技术引入QAM调制系统中,并利用仿真软件对其进行仿真。仿真结果表明,基于LDPC编码的QAM调制系统的性能得到了改善,降低了系统的误码率,到达了预期目的。

It found that QAM expenses its anti-interference to obtain the high frequency utilization on the basis of analysis deeply in QAM modulation system In order to improve the data transmission quality of QAM modulation system and reduce BER, the technology of LDPC code in the system of QAM modulation was applied, and the simulation software for system simulation was used. Simulation results show that it improved the performance of QAM modulation system based on LDPC code, BER got lower, and reached file expected purpose.