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.
出处
《低压电器》
2004年第1期40-43,共4页
Low Voltage Apparatus
