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低压电网基于发射效率的OFDM比特分配算法

Bit Allocation Algorithm for Low Voltage Network OFDM Systems Based Transmitted Efficiency
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摘要 低压电网信道衰减特性变化剧烈,正交频分复用(OFDM)系统的自适应调制技术根据每个子载波的信道状况和用户需求,为每个用户分配最佳的子载波,为每个子载波分配最佳的调制方式,这样可以更好地利用信道资源,提高传输速率.以低压电网为对象,利用多项式函数拟合的低压电网信道模型,从基于SNR门限的比特分配算法出发,提出了一种基于发射效率的OFDM比特分配算法,并与固定调制方式和固定功率分配的OFDM系统进行对比.结果表明该算法能够根据各个子信道的实际传输情况灵活地分配发送功率和信息比特,使更多的子载波可以使用性能好的调制方式,从而有效地利用了低压电网信道资源. Selfadaptation OFDM is suitable for the low voltage network. 'To satisfy the request of high speed communication in low voltage network, this paper studies a bit allocation algorithm for low voltage network OFDM systems based transmitted efficiency. And compared with the fix modulate OFDM and fix power OFDM, this algorithm can allocate the power and modulate flexibly and increase the speed. It is very appropriate for the low voltage network application.
出处 《重庆大学学报(自然科学版)》 EI CAS CSCD 北大核心 2006年第11期85-88,共4页 Journal of Chongqing University
基金 云南省省院省校科技合作计划项目(24031)
关键词 低压电网 电力线通信 自适应OFDM 发射效率 比特分配算法 low voltage network power line ommunication selfadaptation OFDM transmitted efficiency bit allocation algorithm
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参考文献9

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