一种改进的OFDM系统的功率和比特分配算法  

A Modified Bits and Power Allocation Algorithm for OFDM System

作　　者：刘保军[1] 李彦[1] 

机构地区：[1]空军工程大学理学院,陕西西安710051

出　　处：《通信技术》2009年第4期186-188,共3页Communications Technology

摘　　要：OFDM系统中采用自适应技术,可以使系统的性能得到改善。首先简单介绍了经典的自适应比特功率分配算法:H-H算法。其次提出了一种新的自适应算法,此算法改进了H—H算法的初始条件,并且进行多比特分配来提高性能。最后的仿真结果显示该算法减少了迭代时间,而且降低了误比特率,优化了系统的性能。The adaptive technology employed in OFDM could improve the performance of system. This paper first describes the classical bits and power allocation algorithm-greed algorithm, then proposes a new adaptive algorithm, which improves the initial conditions of greed algorithm and implements multi bit allocation to make the performance better. Finally, the simulation result shows that this algorithm could reduce the time of allocation and bit error rate, optimize the system function.

关 键 词：自适应 贪婪算法 MATLAB 

分 类 号：TN911.3[电子电信—通信与信息系统]