切换驻留合并与选择合并相结合的混合合并技术  

Hybrid combining technique composed of Switch-and-Stay Combining and Selection Combining

作　　者：郭冬梅[1] 张曙[1] 

机构地区：[1]哈尔滨工程大学信息与通信工程学院,哈尔滨150001

出　　处：《吉林大学学报（工学版）》2010年第4期1133-1138,共6页Journal of Jilin University:Engineering and Technology Edition

基　　金：国防科学技术工业委员会基础研究基金项目(40106030503)

摘　　要：针对分集合并技术中低复杂度与高性能之间存在的矛盾,将选择合并(SC)与切换驻留合并(SSC)相结合,提出一种新的混合合并方式SSC-SC,并对瑞利信道下2L个独立同分布分支的SSC-SC系统进行研究,给出了平均输出信噪比SNR、误码率BER、电平交叉率LCR和平均中断时间AOD的闭合表达式。最后将SSC-SC与选择合并和广义选择合并(GSC)进行比较,结果表明SSC-SC性能稍差,但在可以接受的范围内,而其最大特点是结构简单、易于实现、节约资源,具有良好的实际应用价值。Low-complexity and high-performance of diversity combing schemes always conflict. A new hybrid combining technique named SSC-SC is proposed,which is composed of Selection Combining （ SC） and Switch-and-Stay Combining （ SSC） . The SSC-SC scheme with 2L branches in Rayleigh fading channel is studied. The closed-form expressions for the average output Signal-to-Noise Ratio （ SNR） ,Bit Error Ratio （ BER） ,Level Crossing Rate （ LCR） and Average Output Duration （ AOD） of the SSC-SC system are provided. Finally,the proposed SSC-SC is compared with SC and with Generalized Selection Combining （ GSC） . Results show that the performance of SSC-SC is not as good as that of SC and GSC but is still acceptable. From the standpoint of implementation,SSC-SC is characterized by simple structure,easy realization and resources saving. With these characteristics,SSC-SC is feasible for practical application.

关 键 词：通信技术 混合合并 切换驻留合并 选择合并 平均输出信噪比 误码率 电平交叉率 平均中断时间 

分 类 号：TN929.5[电子电信—通信与信息系统]