射频六端口OFDM解调器研究  

A Study of Microwave Six-Port OFDM Demodulator

作　　者：张兰[1] 王兵[2] 

机构地区：[1]北京科技大学信息工程学院,北京海淀区100083 [2]北京卫星信息工程研究所,北京海淀区100086

出　　处：《电子科技大学学报》2008年第1期31-34,共4页Journal of University of Electronic Science and Technology of China

摘　　要：该文提出了一种新的基于射频六端口网络的多频带OFDM解调器。推导了该解调器的数学模型,仿真了用于WLAN802.11a通信系统时,射频六端口网络的本振电平、输入信号电平对解调器性能的影响。研究了射频六端口网络中正交电桥和同相电桥分别存在相位幅度不平衡时和同时存在相位幅度不平衡时解调器误差矢量幅度的特性。讨论了解调器的动态范围、接收性能等指标。结果表明结合当前的MMIC集成水平,使用射频六端口网络可以实现多频带、多制式、多载波的OFDM解调器。A novel microwave six-port network orthogonal frequency division multiplexing （OFDM） demodulator is presented in this paper. The model of demodulator is educed. The influence of local oscillator level and input level of microwave six-port network to demodulator are simulated in the condition of IEEE802.11a communication system. The characteristics of error vector magnitude （EVM） of demodulator are investigated when 90° hybrid bridge and 0° hybrid bridge in microwave six-port network have amplitude/phase imbalance separately or synchronously, respectively. The performance of this demodulator is discussed. The result shows that microwave six-port network can be used to realize a multi-band, multi-mode and multi-carrier OFDM demodulator.

关 键 词：误差矢量幅度 正交频分复用 射频六端口网络 无线局域网 

分 类 号：TN92[电子电信—通信与信息系统]