摘要
提出了一种改进的OFDM系统中自适应比特功率分配算法。该算法可适用于多径频率选择性衰落信道,根据信道特征,动态地为OFDM系统的各子信道分配比特和发送功率。该算法在一定的误比特率和信息速率的情况下,使得总发送功率最小化。仿真结果表明,该算法在相同误比特率的情况下比不采用自适应技术的OFDM系统节省了发送功率。
This paper proposes adaptive bit and power allocation algorithm for frequency division OFDM system, which can be used over multipath frequency selective fading channels. The adaptive algorithm assigns the bits and power to the subchannels, According to the subcarrier gains to minimize the total transmission power for a given bit error rate. The simulation results show that the proposed adaptive system save power compared with non-adaptive systems.
作者
高俊磊
GAO Jun-lei （College of Optoelectronic Engineering;Nanjing University of Posts and Telecommunications;Nanjing 210003;China）
出处
《电脑知识与技术》
2007年第10期146-147,153,共3页
Computer Knowledge and Technology
