International Journal of Electrical, Electronics and Computer Engineering (IJEECE)
In this paper, the authors address channel estimation based on the Minimum Mean Square Error (MMSE) and Least Square (LS) criteria and also consider time-domain channel statistics. It presents an optimal criterion for the pilots, and corresponding optimal designs enabling complexity reductions. Using a general model for a slowly fading channel, the MMSE and LS estimators and a method for modifications compromising between complexity and performance is presented. The symbol error rate for a 16-QAM system is estimated by means of simulation results.