基于IEEE802.16e的子载波分配方式分析

针对IEEE802.16e规定的分布式和连续式2种基本的子载波分配方式,以上行链路为例,分析无线移动信道环境下,其接收端信号的功率分布、信号干扰噪声比SINR的累积分布函数曲线CDF(cumulative distribution function)分布,得出了分布式子载波分配功率分布更加集中的特点。同时,通过分析用户逻辑子信道上所采用的调制编码方案MCS(modulation coding scheme)的分布,从另一个角度验证分析结果,进一步给出2种不同分配方式的性能特点和适用情况,对IEEE802.16e的OFDMA无线资源的有效管理和调度具有积极的指导意义和实用价值。

Performance analysis of subcarrier allocation based on IEEE802. 16e

Aiming at the tw o basic way s of subcarr ier allo cat io n in IEEE802. 16e called the dist ributed subcarrier permutation and the adjacent subcarrier permutation, the dist ribut ion curves of the received signal pow er and the CDF ( cumulat ive dist ribut ion funct ion) of SIN R w ere analyzed in the U L under the mobile channel. T he resul t show s that the pow er dist ribut ion of the dist ributed subcarr ier permutat ion is more centr al ized and is consistent w ith the analysis of the use o f MCS ( modulat ion co ding scheme) o n OFDMA subchannels. T he tw o basic w ays of subcarrier allocation based o n sub-channel have dif ferent performance characterist ics and applicable conditio ns were pro vided. T he conclusion has act ive meanings to the management and schedul ing of OFDMA w ireless resources