Role of Contributing Factors MIMO-OFDM in 4G-LTE Wireless Transmission Technologies from Technical Perspective

Abstract: This paper studies the role of MIMO-OFDM as foremost contributing performance factors in 4G LTE Wireless Transmission Technology from a technical perspective. Long Term Evolution (LTE) uses Orthogonal Frequency Division Multiplexing (OFDM) along with MIMO (Multiple Input Multiple Output) antenna technology standard to achieve high radio spectral efficiency and multi-carrier approach for multiple accesses. For the downlink OFDM is used and for the uplink SC-FDM (Single Carrier - Frequency Division Multiplexing) also known as DFT (Discrete Fourier Transform) is used. In this paper Bit-Error-Rate (BER) is calculated and measured with respect to Signal to Noise Ratio (SNR). The higher SNR at the receiver enabled by MIMO, along with OFDM which provides improved coverage and throughput, especially in dense urban areas.

Keywords: Long Term Evolution, Signal-to-Noise Ratio, Bit-Error-Rate, Cyclic Prefix.