| 摘要: |
| 针对载波、功率资源分配问题，考虑本小区对其它小区的干扰情况，提出了一种应用于多
小区正交频分多址复用（OFDMA）系统中的改进罚函数模拟退火(PSA)算法。该问题模型是在
传输速率和性能
一定的条件下，最小化传输功率。该算法是一种随机寻优算法，是一种能将局部搜索扩展为
全局搜索的启发式算法。仿真结果表明，改进算法简化了问题模型，可以在不影响系统性能
的情况下减少运算时间。基于模拟退火算法的离散功率的取值具有随机性，但是整体规律性
仍很明显，且能够获得较高的单位功率吞吐量。 |
| 关键词: 多小区OFDMA系统 资源分配 罚函数 模拟退火 离散功 |
| DOI： |
|
| 基金项目: |
|
| An Improved Penalty-SA Based Resouce Allocation Algorithm for OFDMA Cellular Systems |
| ZHAO Qing-li,JI Chun-mei |
| (School of Electronic and Information Engineering, South China University of T
echnology,Guangzhou 510640,China) |
| Abstract: |
| In consideration of the interference from other cells,an improved penalty simula
ted an
nealing(PSA) algorithm used in multi-cell OFDMA systems is proposed for carrier
and
power allocation. The question model is to minimize transmitted power subject t
o transmitted rate and performance. This stochastic optimizing algorithm is an h
euristic algorithm which expands local search into global search. Experimental r
esults show that the improved algorithm can decrease the complexity of the mode
l and operation time without affecting system performance. Though the value of d
iscrete power based on simulated annealing algorithm is random, the whole regula
rity is ob
vious with high throughput per unit power. |
| Key words: OFDMA cellular system resource allocation penalty function simulated annealin
g discrete power |
