矿井巷道协作MC-CDMA功率控制与扩容
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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.
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.
引文
[1]Sun Zhi,Akyildiz I F.Channel modeling and analysis for wireless networks in underground mines and road tunnels[J].IEEE Trans Commun,2010,58(6):1758-1768.
[2]张琳园,杨维.矿井巷道时频编码协作MC-CDMA无线传输[J].煤炭学报,2014,39(6):1177-1183.
[3]张琳园,杨维.矿井巷道时频编码协作MC-CDMA伙伴选择与子载波分配[J].煤炭学报,2014,39(10):2141-2146.
[4]胡茂凯,陈西宏,张群.多径衰落信道下MC-DSCDMA系统性能分析[J].华中科技大学学报:自然科学版,2013,41(1):97-101.
[5]杨维,冯锡生,程时昕.新一代全矿井无线信息系统理论与关键技术[J].煤炭学报,2004,29(4):506-509.
[6]Permuter H H,Shamai S,Somekh-Baruch A.Message and state cooperation in multiple access channels[J].IEEE T Inform Theory,2011,57(10):6379-6396.
[7]田雨,马林华,唐红,等.基于虚拟MIMO的协作通信节点选择算法[J].电子与信息学报,2014,36(4):797-803.
[8]Zhu Y,Gunawan E.Performance of MC-CDMA system using controlled MRC with power control in Rayleigh fading channel[J].Electronics Letters,2000,36(8):752-753.
[9]Lee Y H,Bar-Ness Y.Transmission power adaptations in MC-CDMA communications over Rayleigh fading channels[C]∥Preceedings of the IEEE Wireless Communications and Networking Conference.Atlanta:IEEE,2004:1589-1594.
[10]Kim Yun Hee,Song Lickho,Yoon Seokho.A multicarrier CDMA system with adaptive subchannel allocation for forward links[J].IEEE Trans on SRPVT,1999,48(5):1428-1436.
[11]吴凡,毛玉明,黄晓燕,等.OFDMA系统中最优能效功率分配[J].电子与信息学报,2014,36(7):1673-1679.
[12]Kamal A A,Hussain A A,Patrick G.A blind block based DCT watermarking technique for gray level images using one dimensional Walsh coding[C]∥Proceedings of the International Conference on the Current Trends in Information Technology.Dubai:IEEE,2009:1-6.
[13]Nsratinia A,Hunter T E.Grouping and partner selection in cooperative wireless networks[J].IEEE Journal on Selected Areas in Communications,2007,25(2):369-378.
[14]Shan Hangguan,Wang Hao,Wang Zongxin.Joint optimization of subchannel reassignment and power adaptation for multicarrier cooperative systems[C]∥Preceedings of the IEEE Conf on WiCom.Shanghai:IEEE,2007:974-979.
[15]Sun Zhi,Akyildiz I F.Channel modeling and analysis for wireless networks in underground mines and road tunnels[J].IEEE Trans Commun,2010,58(6):1758-1768.
[16]张琳园,杨维.矿井巷道时频编码协作MC-CDMA信道估计[J].煤炭学报,2015,40(2):481-486.
[2]张琳园,杨维.矿井巷道时频编码协作MC-CDMA无线传输[J].煤炭学报,2014,39(6):1177-1183.
[3]张琳园,杨维.矿井巷道时频编码协作MC-CDMA伙伴选择与子载波分配[J].煤炭学报,2014,39(10):2141-2146.
[4]胡茂凯,陈西宏,张群.多径衰落信道下MC-DSCDMA系统性能分析[J].华中科技大学学报:自然科学版,2013,41(1):97-101.
[5]杨维,冯锡生,程时昕.新一代全矿井无线信息系统理论与关键技术[J].煤炭学报,2004,29(4):506-509.
[6]Permuter H H,Shamai S,Somekh-Baruch A.Message and state cooperation in multiple access channels[J].IEEE T Inform Theory,2011,57(10):6379-6396.
[7]田雨,马林华,唐红,等.基于虚拟MIMO的协作通信节点选择算法[J].电子与信息学报,2014,36(4):797-803.
[8]Zhu Y,Gunawan E.Performance of MC-CDMA system using controlled MRC with power control in Rayleigh fading channel[J].Electronics Letters,2000,36(8):752-753.
[9]Lee Y H,Bar-Ness Y.Transmission power adaptations in MC-CDMA communications over Rayleigh fading channels[C]∥Preceedings of the IEEE Wireless Communications and Networking Conference.Atlanta:IEEE,2004:1589-1594.
[10]Kim Yun Hee,Song Lickho,Yoon Seokho.A multicarrier CDMA system with adaptive subchannel allocation for forward links[J].IEEE Trans on SRPVT,1999,48(5):1428-1436.
[11]吴凡,毛玉明,黄晓燕,等.OFDMA系统中最优能效功率分配[J].电子与信息学报,2014,36(7):1673-1679.
[12]Kamal A A,Hussain A A,Patrick G.A blind block based DCT watermarking technique for gray level images using one dimensional Walsh coding[C]∥Proceedings of the International Conference on the Current Trends in Information Technology.Dubai:IEEE,2009:1-6.
[13]Nsratinia A,Hunter T E.Grouping and partner selection in cooperative wireless networks[J].IEEE Journal on Selected Areas in Communications,2007,25(2):369-378.
[14]Shan Hangguan,Wang Hao,Wang Zongxin.Joint optimization of subchannel reassignment and power adaptation for multicarrier cooperative systems[C]∥Preceedings of the IEEE Conf on WiCom.Shanghai:IEEE,2007:974-979.
[15]Sun Zhi,Akyildiz I F.Channel modeling and analysis for wireless networks in underground mines and road tunnels[J].IEEE Trans Commun,2010,58(6):1758-1768.
[16]张琳园,杨维.矿井巷道时频编码协作MC-CDMA信道估计[J].煤炭学报,2015,40(2):481-486.