Abstract Multiple-Input Multiple-Output (MIMO) communication System-Orthogonal
Frequency Division Multiplexing (OFDM) approach can produce reliable transmission of …

In this paper, the cell-free massive multiple input multiple output (MIMO) network is affected
by the pilot contamination phenomenon when a large number of users and a small number …

In this work, two pilot assignment schemes are proposed to mitigate pilot contamination and
improve the performance of the downlink cell-free massive MIMO system. A genetic …

In underwater acoustic-orthogonal frequency division multiplexing (UWA-OFDM) systems,
the performance of channel estimation is significantly affected by pilot allocation in the …

Compressive sensing (CS) based sparse channel estimation requires optimal pilot patterns,
whose corresponding sensing matrices should have small mutual coherences, so as to …

In this paper, a pilot allocation (PA) scheme based on genetic algorithm (GeA) has been
proposed to cope with the pilot contamination problem and increase the system …

Compressed sensing (CS) technologies have been widely adopted to pilot-assisted
orthogonal frequency division multiplexing (OFDM) sparse channel estimation. However …

In this paper, to investigate sparse channel estimation in OFDM communication systems, we
propose a novel binary particle swarm optimization (BPSO) based pilot pattern design …

Accurate placement of pilot tones has been a crucial task in multicarrier transmission
technologies since there is a strong relation between pilot positions and channel estimation …

In this paper, we evaluate the effectiveness of compressed-sensing-based channel
estimation in LiFi orthogonal frequency-division multiplex (OFDM) systems with multiple …