ZHANG Rui, LIU Shi-hui, SAI Ying-fu. Bit and Power Allocation Algorithm for Adaptive OFDM System of Power Line[J]. 2011, 16(4): 73-77.DOI:
低压电力线自适应OFDM系统比特功率分配算法
摘要
自适应OFDM系统的比特功率分配能够提高频谱利用率
可以有效地克服低压电力线的多径干扰.在实际系统中
由于对传输比特数整数规划的要求
注水功率算法无法达到比特功率分配的优化结果
鉴于此考虑低压电力线信道的实际传输特性
提出具有变异特性的简化云粒子群优化算法(SCAPSO)
对OFDM系统进行比特功率分配
从而解决在功率及系统误码率限定条件下传输速率最大化的比特功率分配问题.仿真实验表明
本文提出的算法与贪婪算法性能相当
节省运算时间
与注水功率算法和粒子群优化算法相比
提高了系统传输速率.
Abstract
Adaptive OFDM system can improve spectrum efficiency and overcome the multi-path interference of the low-voltage power line effectively.Due to the modulation manner and actual integer programming requirements
optimal results of Water-filling algorithm can not be obtained.Simplified cloud particle swarm optimization(SCAPSO) with characteristics of variation is proposed in this paper in consideration of transmission behaviour of power line channel
accordingly the problem of bit allocation maximizing data rate...