New Algorithm for Time and Frequency Synchronization in MIMO-OFDM Systems Sandeep Kumar Singh 1 • Anagha. P. Rathkanthiwar 2 • Abhay S. Gandhi 1 Ó Springer Science+Business Media New York 2017 Abstract This paper addresses the problem of time and frequency synchronization in MIMO-OFDM systems, which are extremely sensitive to these errors. A preamble based algorithm is proposed for the estimation of synchronization errors. Product of autocorre- lation function and cross correlation function is used for symbol timing offset estimation which reduces the uncertainty in timing estimation due to timing metric plateau. Phase difference between two identical parts of the preamble is used for carrier frequency offset estimation. Simulation results are presented to validate the performance of the algorithm. Keywords MIMO-OFDM  OFDM synchronization  Timing synchronization  Carrier frequency offset  Frequency synchronization 1 Introduction Multiple input multiple output-orthogonal frequency division multiplexing (MIMO- OFDM) is the backbone of the most of practical wireless communication technologies such as IEEE 802.11n, 3GPP LTE, and WiMAX etc. It is one of the most used air interface for 4G and among important technologies for 5G, Massive MIMO, broadband wireless communications [1]. MIMO-OFDM combines and exploits advantages of both the tech- nologies, for example achieving greatest spectral efficiency, delivering the highest capacity and data throughput, etc [2]. & Sandeep Kumar Singh sandeepraju1988@gmail.com 1 Department of Electronics and Communication Engineering, Visvesvaraya National Institute of Technology, Nagpur, Maharashtra, India 2 Department of Electronics Engineering, Priyadarshini College of Engineering, Nagpur, Maharashtra, India 123 Wireless Pers Commun DOI 10.1007/s11277-017-4090-x