改进QAM调制技术在电力通信中的应用研究  

Research of Improved QAM Techniques Application in PLC System

作　　者：张在玲[1] 韩富春[2] 朱永利[1] 靳春光[1] 

机构地区：[1]华北电力大学,河北保定071003 [2]太原理工大学,山西太原030024

出　　处：《低压电器》2004年第1期40-43,共4页Low Voltage Apparatus

摘　　要：论述了电力通信中QAM调制技术及其不足,提出了改进QAM调制下的编、译码结构及译码算法。解决了宽带利用率和传输速率之间的矛盾,提高了抗干扰性和纠错能力,在电力线通信中具有较好的应用前景。In this paper, the QAM modulation techniques and its disadvantages were discussed, and, the struc- tures of the coder and the decoder were given and presented, the corresponding decoding algorithm was presented. The proposed strcture and algorithm can Solve the conflict between the bandwidth utilization and transmission speed. Moreover, Viterbi decoding technqiues are adopted to improve the capacity of interference rejection and correctness. Therefore, the improved QAM techniqies show good prospect in power-line communication system.

关 键 词：电力通信 QAM调制 电力系统 数字通信 抗干扰性 

分 类 号：TM73[电气工程—电力系统及自动化] TN76[电子电信—电路与系统]