دانلود مقاله ترجمه شده تخمین نیمه کور کانال MIMO-OFDM براساس ICA و حامل های راهنما

Abstract

This paper presents a semi-blind channel estimation  approach  for  MIMO-OFDM  Systems.  The  proposed  method is a combination of methods based on Independent Component Analysis(ICA) and methods based on Pilot Carriers. Firstly,  the  Pilot  Carriers  are  used  for  pre-estimation  of  the channel,  and  then  the  pre-estimated  values  are  exploited  as  a  kind of piroir information in the algorithm of ICA. Secondly, the ordering  and  scaling  of  the  estimated  sources  are  corrected  by  the convolutional encoding between data carriers and pilot carriers.  Experimental  results  show  that  the  proposed  method  achieves  higher  accuracy  and  significantly  better  performance camparing with whole-blind source seperation methods.