Mitigating the Effect of Pilot Contamination in Massive Multiple Input Multiple Output System Using Pilot Allocation Protocol

A.M.S Tekanyi, S. M. Waziri, M. B. Abdulrazaq, S. M. Yusuf

Abstract


 

Pilot Contamination (PC) is considered a major drawback of Time Division Duplexing (TDD) Massive Multiple-Input Multiple-Output (M-MIMO) systems because it limits their expected capacity. A Pilot Allocation Protocol (PAP) scheme is proposed in this letter to mitigate the effect of PC in order to improve the performance of users affected severely by PC. Specifically, the PAP technique is based on sectional pilot sequence initialization and sharing which allocate more than one user to share the same orthogonal pilot sequence within a cell which then creates intra cell interference between the users sharing the same pilot sequence but suppresses inter cell interference between users sharing the same pilot sequence in other cells and mitigate the effect of PC. Simulation results verify the performance gain of the proposed scheme over that of conventional schemes in a typical M-MIMO system.


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References


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