A Novel Estimation and Tracking of Channel for MIMO-OFDM Systems

Gadda Archana Devi,MoparthyGurunadhaBabu

Recent days, due to the transmission of higher data rates over wireless networks and maximum efficiency, MIMO-OFDM has become most vital wireless communications system. Further, this is also enhanced to long term evaluation (LTE) and 5th generation (5G) wireless networks. For higher practical mobility altering, these MIMO-OFDM systems requires an accurate channel estimation under severe time and frequency selective fading channels. Most of the methods presented in the literature trust on non-realistic estimations or result in impractical complexities, which doesn’t suit for the applications such as LTE and 5G networks. To enhance the performance of MIMO-OFDM system that suits for ultra-speed data transmission by mitigating the values of bit error rate, a new scheme of channel estimation (CE) is proposed. In addition, our proposed channel estimation scheme altered to derive the initial channel fluctuation and its Doppler rate, afterwards during the payload applied for MIMO channel tracking (CT) using discrete multivariate hybrid linear quadratic estimation (DMH-LQE) filter, which provides better performance under the severe channel conditions like time selective (TS) and frequency selective (FS) fading channels. Extensive analysis of simulation obtained superior performance over the conventional CE and even CT algorithms with reduced BER performance. It is also achieved lower diversity of transmitting bits by applying DMH-LQE filter and the superior estimation of c

Volume 11 | 02-Special Issue

Pages: 2135-2144