均匀功率谱密度约束下的OFDM－UWB比特分配算法

山东大学学报(工学版)

均匀功率谱密度约束下的OFDM－UWB比特分配算法

郭举修¹，陈　哲²，王德强²

1．山东大学离退休工作处，山东济南 250061；2．山东大学信息科学与工程学院，山东济南 250100

收稿日期:2006-08-14 修回日期:1900-01-01 出版日期:2007-02-24 发布日期:2007-02-24
通讯作者: 郭举修

Bit allocation algorithm for OFDM-UWB with constraints of uniform power spectrum density

GUO Ju-xiu¹, CHEN Zhe², WANG De-qiang²

1.Office for Staff Members Retired，Shandong Univercity，Jinan 250061，China; 2.School of Information Science and Engineering, Shandong University,Jinan 250100, China

Received:2006-08-14 Revised:1900-01-01 Online:2007-02-24 Published:2007-02-24
Contact: GUO Ju-xiu

摘要/Abstract

摘要： 针对基于正交频分复用的超宽带系统（OFDMUWB），提出一种自适应比特分配算法，以对抗超宽带信道的频率选择性衰落.以系统传输速率和均匀功率谱密度为约束条件，将比特分配问题转换为以误比特率（BER）为目标函数的最优化问题，给出了比特分配算法的具体步骤.仿真结果表明该算法可以有效地提高系统性能.

关键词: 超宽带, 正交频分复用, 比特分配, 均匀功率谱密度

Abstract: To the ultrawideband systems (OFDMUWB) based on orthogonal frequency division multiplexing, an adaptive bit allocation algorithm is proposed to combat the frequency selective fading of ultrawideband channels. Under the constraints of data transmitting rate and uniform power spectrum density, the bit allocation is transformed into an optimization problem, whose target function is bit error rate. The bit allocation algorithm is presented in details. Simulation results suggest that the proposed algorithm can effectively boost the system performance.

Key words: OFDM, bit allocation, uniform power spectrum density , UWB

中图分类号:

TN911

郭举修,陈　哲,王德强 . 均匀功率谱密度约束下的OFDM－UWB比特分配算法[J]. 山东大学学报(工学版), 2007, 37(1): 39-42 .

GUO Ju-xiu,CHEN Zhe,WANG De-qiang . Bit allocation algorithm for OFDM-UWB with constraints of uniform power spectrum density[J]. JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE), 2007, 37(1): 39-42 .

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