1.
Suraiya Tarannum
– Professor, Dept. Of Ece, Hkbk College Of Engineering, Bengaluru, Karnataka, India.
2.
Shaista Farheen
– Professor, Dept. Of Ece, Hkbk College Of Engineering, Bengaluru, Karnataka, India.
Abstract
The essence of modern telecommunication systems in this era of emerging wireless technology is invariably Multiple Input Multiple Output (MIMO), in combination with Orthogonal Frequency Division Multiplexing (OFDM) forming the much promising MIMO-OFDM systems. These systems form an attractive air-interface for the next generation Wireless Local Area Network (WLAN) and Wireless Fidelity (Wi-Fi) Systems. The MIMO-OFDM systems are characterized by enviably High Data Transmission Rates, along with excellent Spectral Efficiency and robustness against Noise with extremely small Bit Error Rate (BER), while providing excellent SNR characteristics. One of the challenges faced by a Wireless Engineer in these systems is the precise determination of Channel Estimation (CE), which has attracted a lot of research in recent times. In this paper, we present various Channel Estimation techniques being explored over the years, to complement the excellent features offered by this technology.
Keywords Blind CE, Channel Estimation (CE), MIMO, MIMO-OFDM, OFDM, Pilot based CE.
