补码键控正交频分复用系统仿真研究  

Simulation of CCK-OFDM Systems

作　　者：孙高飞[1] 吴杰[1] 孟庆微[1] 

机构地区：[1]空军工程大学电讯工程学院,陕西西安710077

出　　处：《计算机仿真》2008年第3期134-137,共4页Computer Simulation

摘　　要：补码键控-正交频分复用(CCK-OFDM)技术是无线局域网标准IEEE802.11g指定的调制方式之一,结合了补码键控(CCK)调制和正交频分复用(OFDM)技术的性能优势,增强了抗多径、抗窄带干扰、抗频率选择性衰落的能力,在未来可兼容性、高速率的无线局域网数据传输中起着重要作用。文章在回顾了CCK、OFDM技术基本原理的基础上,提出了CCK-OFDM系统的仿真流程,并运用Matlab在高斯信道环境和典型的多径信道环境进行了蒙特卡罗仿真。结果表明,在不降低编码效率的条件下,CCK-OFDM系统性能较OFDM系统有大约3dB的改善。CCK - OFDM is an optional standard of Wireless LAN criterion （ IEEE802. 11 g）, which combines the advantages of the CCK and OFDM performance, enhances the ability of anti -multipath, narrowband interference suppression and frequency -selective fading suppression, and will play a very important role in future network data transmissions. Based on introducing the principles of CCK and OFDM briefly, a simulation framework of the CCK - OFDM system is proposed, the system performance under AWGN channels and the Rayleigh fading channels is simulated by Monte Carlo using Matlab. Without reducing the coding efficiency, the CCK -OFDM system acquires about 3dB Gain in BER performance than the OFDM system ,as the simulation result indicated.

关 键 词：无线局域网 补码键控-正交频分复用 蒙特卡罗仿真 

分 类 号：TP302.7[自动化与计算机技术—计算机系统结构]