Review of the Pilot Contamination Problem for Massive Mimo and Possible Solution
نویسندگان
چکیده
With the increasing demands of data communication speed for different type of data transmission, many revolutions occur with time in wireless communication system. The use of MIMO for wireless data transmission has proven itself for enhancing the capacity of data transmission. The mobile network based on the cell structure also uses the MIMO techniques. Further research in the field of massive MIMO has started for faithful data transmission. The enhancement by massive MIMO encounters many problems related to the implementation. One of the biggest challenges for massive MIMO is the pilot contamination. In this paper, Massive MIMO along with the pilot contamination is described. The research work presented by the researcher on this topic has summarized which also includes the possible solution to this problem.
منابع مشابه
On Hybrid Pilot for Channel Estimation in Massive MIMO Uplink
This paper introduces a hybrid pilot-aided channel estimation technique for mitigating the effect of pilot contamination for the uplink of multi-cell multiuser massive MIMO systems. The proposed hybrid pilot is designed such that it enjoys the complementary advantages between time-multiplexed (TM) pilot and time-superimposed (TS) pilot, and thereby, allows superior solution to the conventional ...
متن کاملDesign of Orthogonal Uplink Pilot Sequences for TDD Massive MIMO under Pilot Contamination
—Massive MIMO has been acknowledged as a promising technology to counter the demand for higher data capacity for wireless networks in 2020 and beyond. However, each Base Station (BS) requires good enough knowledge of Channel State Information (CSI) on both the uplink and the downlink as massive MIMO relies on spatial multiplexing. In Time Division Duplex (TDD) massive MIMO systems, this CSI is...
متن کاملUplink Sounding Reference Signal Coordination to Combat Pilot Contamination in 5G Massive MIMO
To guarantee the success of massive multiple-input multiple-output (MIMO), one of the main challenges to solve is the efficient management of pilot contamination. Allocation of fully orthogonal pilot sequences across the network would provide a solution to the problem, but the associated overhead would make this approach infeasible in practical systems. Ongoing fifth-generation (5G) standardisa...
متن کاملMax-Min Fair Transmit Precoding for Multi-Group Multicasting in Massive MIMO
This paper considers the downlink precoding for physical layer multicasting in massive multipleinput-multiple-output (MIMO) systems. We study the max-min fairness (MMF) problem, where channel state information (CSI) at the transmitter is used to design precoding vectors that maximize the minimum spectral efficiency (SE) of the system, given fixed power budgets for uplink training and downlink t...
متن کاملLocation-Aided Pilot Decontamination for Massive MIMO Systems
One of the key limitation of massive MIMO systems is pilot contamination, which is defined as the interference during uplink channel estimation due to re-use of the same pilots in surrounding cells. In this paper, we propose a location-based approach to the pilot contamination problem for uplink MIMO systems. Our approach makes use of the approximate locations of mobile devices to provide good ...
متن کامل