基于分子带电力线载波速率最大化算法

Research on Rate Maximization Algorithm Based on Sub-bands for Power Line Carrier

在Q/GDW 1379.4-2013通信单元检验技术规范对载波通信单元功率消耗的限定要求下,为了有效提高低压电力集抄台区电能信息的采集速率,建设高速实时、双向智能的用电信息采集系统,提出了一种基于分子带的电力线载波速率最大化算法。以带宽2~30 MHz为信号载频,结合Homeplug AV规约下的子载波自适应调制方式,将相邻子载波进行逻辑分组为子带,以中值信噪比门限算法为基础,融入贪婪功率分配机制,合理分配分子带比特数,得到了最大化载波速率。仿真结果表明:较传统的信噪比门限算法和Homeplug AV自适应比特分配算法,提出的算法具有更高的载波速率,而相比于传统贪婪算法,虽达到的载波速率略低,却极大地降低了计算复杂度和硬件开销。

In order to develop the collection efficiency for power utilization information in low voltage power metering area,a high speed,real-time and bilateral intelligent power utilization information collection system is constructed under the demand of limitation for communication unit power consumption defined in Q/GDW 1379. 4-2013 technical specification. A rate maximization algorithm based on sub-bands for power line carrier is proposed. In the algorithm,signal carrier band is 2 ~ 30 MHz. The adaptive sub-carrier modulation based on Homeplug AV statute is combined to make the neighboring sub-carriers be a unit sub-band. The greedy power allocation is assimilated into the average SNR threshold algorithm to allocate the bite on each sub-band which we set so as to acquire the maximal carrier rate.Simulation results show that the algorithm proposed owns a higher carrier rate compared to the classical SNR threshold algorithm and Homeplug AV method. Although it has weaker rate compared to the classical greedy algorithm,it cuts greatly the calculating complexity and hardware consumption.