矿井巷道协作MC-CDMA功率控制与扩容  

Power control and capacity expansion of cooperation MC-CDMA in mine tunnel

作　　者：杨维[1] 张琳园[1] 许晶晶[1] 邵小桃[1] 

机构地区：[1]北京交通大学电子信息工程学院,北京100044

出　　处：《华中科技大学学报（自然科学版）》2016年第5期64-70,共7页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家'十二五'科技支撑计划资助项目(2013BAK06B03);国家自然科学基金资助项目(51274018)

摘　　要：提出了一种矿井巷道时频编码协作MC-CDMA上行子载波功率控制算法,利用接收端反馈给发送端的每个MC-CDMA子载波对应信道增益的估计值,为每个扩频支路按一定比例去除信道状况较差的一些子载波,从而保证发射功率能有效用于每个扩频支路中信道状况较好的部分子载波.针对MC-CDMA扩频序列长度限制矿井巷道时频编码协作MC-CDMA系统用户容量的问题,提出了一种基于迭代译码的矿井巷道时频编码协作MC-CDMA上行用户容量扩充算法.仿真结果表明:采用所提出的矿井巷道时频编码协作MCCDMA上行子载波功率控制算法,显著提高了系统中用户的误码率性能;采用所提出的矿井巷道时频编码协作MC-CDMA上行用户容量扩充算法,能有效实现系统扩容.A subcarrier power control algorithm was proposed for the uplink time-frequency coded cooperation multiple carrier-code division multiple access（MC-CDMA）wireless transmission to ensure that power could be efficiently utilized on subcarriers with good channel conditions of every spread branch.In the algorithm,the transmitter wiped off a fixed portion of deep fading subcarriers according to the channel gains of MC-CDMA subcarriers feedback from the receiver.A capacity expansion algorithm was proposed based on iterative decoding to break through the restriction on number of users caused by the length of spreading sequence in time-frequency coded cooperation MC-CDMA system.Simulation results show that the bit error rate performance of users are improved significantly with the proposed subcarrier power control algorithm and the capacity expansion is achieved effectively with the proposed capacity expansion algorithm for time-frequency coded cooperation MC-CDMA system under mine tunnels.

关 键 词：编码协作 多载波码分多址 子载波功率控制 用户容量 矿井巷道 

分 类 号：TD655[矿业工程—矿山机电]