一种新的多载波二维码分多址通信系统及其辅助矢量合成接收机研究  

The Study of A Novel MC-2D-CDMA Communication System and Its Auxiliary Vector Combination Receiver

作　　者：肖磊[1] 梁庆林[1] 

机构地区：[1]北京大学电子学系,北京100871

出　　处：《电子学报》1999年第S1期29-32,28,共5页Acta Electronica Sinica

摘　　要：:本文提出了一种适用于前向链路的多载波二维码分多址 (MC 2D CDMA)系统 .由于充分利用了时域和频域上的二维扩频能力 ,MC 2D CDMA系统具有很好的灵活性 ,而且多址能力大大增强 ,还具有抗衰落能力 .针对MC 2D CDMA系统 ,本文又提出了一种辅助矢量合成 (AVC)接收机 .AVC同时具有最大比合成 (MRC)的良好抗衰落能力和正交恢复合成 (ORC)的优点而又克服了二者的缺点 ,是一种更合适于MC 2D CDMA系统的合成方式 .通过仿真 ,验证了频率选择性衰落信道中MC 2DThis paper presents a multicarrier 2 Dimension code division multiple access (MC 2D CDMA) system for forward link.MC 2D CDMA system utilizes fully the 2 Dimension spreading characteristic in both time and frequency domain and so is very flexible.Moreover,2 Dimension Spreading enhances the capability of multiple access and anti fading.We also present an Auxiliary Vector Combination (AVC) receiver for MC 2D CDMA system.AVC can be viewed as the combination of MRC and ORC and has great capability to reject both fading and MAI,but avoids their drawbacks.By simulation,we test its performance in many cases of system load under frequency selective fading channel.The results show the advantage of the proposed system and its receiver.

关 键 词：多载波 码分多址 分集 频率选择性衰落 

分 类 号：TN914.5[电子电信—通信与信息系统]