An Improvement of QR-M MLD for MIMO Wireless Communications
Recently,we can see a lot of wireless systems in many kind of products such as computers,broadcast,and mobile phones.It means that we need higher-speed wireless systems.There are many technique for higher wireless communications,especially a lot of researches for the signal detection technique.In this paper,we propose a new detection method based on the QRM MLD,which is based on the algorithm of QR-M MLD with a tree structure.The nodes on first level represent the symbol candidate of the symbol transmitted by NT-th antenna.The nodes on d-th level represent the candidates of the symbol transmitted from(NT-d+1)-th antenna.Each nodes have the M child nodes which represent the M constellation points,respectively.MLD method check the all of the nodes from first level to NT-th level,so it takes a lot of times.QRM MLD method select M nodes for each level by selecting the nodes which have lower metrics.Our method selects kM nodes by selecting k nodes for each signal point,which have smaller metrics in the set of N(S)in the level.Here we refer to nodes corresponding to the constellation point S as N(S).By this method,we have no chance to delete the correct symbol candidate for all level,and we think the bit error ratio(BER)performance should get better than the other method.
Tatsuki Fukuda Tadaharu Takahashi Hua-An Zhao
Department of Computer Science and Electrical Engineering,Kumamoto University,Japan
国际会议
Progress in Electromagnetics Research Symposium 2011(2011年电磁学研究新进展学术研讨会)
苏州
英文
746-749
2011-09-01（万方平台首次上网日期，不代表论文的发表时间）