节点文献
瑞利衰落信道下OFDM系统多址接入方案的性能比较
On performance of multiple access for OFDM transmission technique in rayleigh fading channel
【摘要】 调制方式和多址接入的灵活性是正交频分复用(OFDM)技术的一大优点。对OFDM系统下行链路的不同多址方式进行了比较,介绍了分别用于OFDM-FDMA和OFDM-TDMA的自适应子载波分配和自适应调制。仿真结果表明:带自适应子载波分配的OFDM-FDMA方式性能最佳。
【Abstract】 One of the advantages of OFDM is the flexibility concerning modulation and multiple access techniques. In this paper, different multiple access schemes for the downlink of OFDM system are compared. Adaptive subcarrier allocation and adaptive modulation,applied to the OFDM-FDMA and OFDM-TDMA respectively, are discussed. Simulation results indicate that OFDM-FDMA with adaptive subcarrier allocation performs the best.
【关键词】 OFDM;
多址接入;
自适应子载波分配;
自适应调制;
【Key words】 OFDM; multiple access; adaptive subcarrier allocation; adaptive modulation;
【Key words】 OFDM; multiple access; adaptive subcarrier allocation; adaptive modulation;
【基金】 国家自然科学基金重大研究项目资助(90104018);国家自然科学基金项目资助(60172052;60002009);国家十五"863"重大研究课题项目资助(2001AA123016)
- 【文献出处】 重庆邮电学院学报(自然科学版) ,Journal of Chongqing University of Posts and Telecommunications , 编辑部邮箱 ,2004年04期
- 【分类号】TN919.3
- 【被引频次】9
- 【下载频次】266