標題: An efficient near-ML algorithm with SQRD for wireless MIMO communications in metro transportation systems
作者: Pan, Chien-Hung
Lee, Ta-Sung
Li, Yiming
電信工程研究所
Institute of Communications Engineering
關鍵字: multiple input multiple output;inter-antenna interference;multiuser detection;QR decomposition;genetic algorithm;evolutionary technique;optimization
公開日期: 2007
摘要: A high-speed multiple input multiple output (NEMO) wireless communication system is proposed for metro transportation. In order to better mitigate the inter-antenna interference (LAI) which degrades the quality of the MIMO receiver, we propose an efficient hybrid multiuser detection (MUD) technique. This approach consists of a two-stage procedure to achieve the optimum multiuser detector (OMD) by an acceptable computational complexity. The first stage performs interference cancellation by using sorted QR decomposition (SQRD), and the second stage performs the genetic algorithm (GA). It has two significant advantages: 1) The SQRD scheme provides "good initial setting knowledge" to improve the fitness of the population for GA. 2) The effect of fitness calculation is obtained from the QR decomposition (QRD) of a MIMO channel. Simulation results demonstrate that the two-stage procedure obtains a gain of 3 dB to 25 dB than other well-known MUD schemes. The computational complexity of the two-stage procedure can be reduced by 30% with QRD than other fitness calculation scheme in GA-MUD.
URI: http://hdl.handle.net/11536/11033
ISBN: 978-1-4244-1395-9
期刊: 2007 IEEE INTELLIGENT TRANSPORTATION SYSTEMS CONFERENCE, VOLS 1 AND 2
起始頁: 328
結束頁: 331
Appears in Collections:Conferences Paper