Indian Journal of Science and Technology

Abstract

Objectives: Novel channel estimation technique of MIMO-OFDM system based on Modified Kalman Filter (MKF).The performance metrics are bit error rate, types of modulation method, size of the antenna, types of the Kalman filter. Methods: The performance methods considered are MKF, Single Kalman Filter (SKF), Double Kalman Filter (DKF).We have evaluated channel effect with respect to QPSK modulation technique and Rayleigh channel. Using MATLAB simulation tool, we have plot the bit error rate versus signal to noise ratio graph for MKF, SKF and DKF method. Results: The proposed channel estimation method improves the bit error rate performance compare to conventional channel estimation method. We have compared the proposed MKF method with the SKF and DKF method. Theoretical analysis and simulation results shows that the proposed channel estimation and tracking method based on MKF offer the excellent improvement in bit error rate compare to conventional channel estimation method. Improvements: We have achieved lowest bit error rate in the proposed MKF method compare to SKF and DKF method. As we increase the number of antenna at transmitter and receiver side we have also achieved the lowest bit error rate in the proposed MKF method.
Keywords: BER (Bit Error Rate), Channel Estimation, DKF (Double Kalman Filter), MIMO-OFDM (Multiple Input Multiple Output - Orthogonal Frquency Division Multiplexing), MKF (Modified Kalman Filter), SKF (Single Kalman Filter)