ASSESSMENT OF DIRTY PAPER CODING WITH DECOUPLING NETWORK FOR MITIGATING PILOT CONTAMINATION IN MASSIVE MIMO SYSTEM
Keywords:
Coupling matrix, decoupling scheme, dirty paper coding, pilot contamination, receiving mutual impedance.Abstract
In this paper, we explore the possibilities of using dirty paper coding with decoupling network to mitigate the effects of pilot contamination in massive MIMO technology. Pilot contamination is one of the challenges that 5G poses and it has been shown to impose some constraints on the capacity of the system. We present the performance analysis on dirty paper coding with decoupling network in massive MIMO system. Mutual coupling is characterized by the receiving mutual impedance method to formulate the decoupling network operating matrix and design. A typical channel model of standard massive MIMO is presented and system performance is evaluated when coupling effects existed before and after decoupling process. Results indicate that output voltages of decoupling network can effectively be removed off the coupling effect. Error performance and channel capacity results demonstrate the promising potentials of dirty paper coding with efficient decoupling scheme in massive MIMO technology.
