Promoting fractional frequency reuse performance for combating pilot contamination in massive multiple input multiple output

<span>Massive multiple-input multiple-output (MIMO) improves spectrum efficiency by increasing the capacity of wireless structure. Therefore, massive MIMO is promising for fifth generation (5G) communications. In MIMO, channel estimation a crucial part that should achieve reliable performance. Pilots are sent from end-users to be used estimating channel. However, problem interference in pilot contamination affects performance cell-edge users. Specifically, appears when same sequence utilized at time more than one terminal. This lead an inaccurate Consequently, decoded data will not reliable. For mitigating these effects, enhanced fractional frequency reuse (eFFR) scheme proposed uses algorithm allocation sequences end users’ devices based on locations users target base station (BS). The simulation results exhibit scenario outweighs traditional FFR within both signal interference, and noise ratio (SINR), capacity. suggested enhances 80% cell terminals other 20% have slightly lower compared FFR.</span>