Performance of MAP Channel Estimator in Power Line Communication with OFDM under Impulsive Noise

Yıl 2018, Cilt: 6 Sayı: 1, 36 - 41, 15.02.2018

SELVA Muratoğlu Çürük

https://doi.org/10.17694/bajece.401998

Öz

Power Line Communication (PLC), which is a competitive
technique especially for in-home applications, faces impulsive noise together
with unstable channel characteristics. These two unpredictable factors make the
communication on power lines difficult, which may reduce the efficiency of Orthogonal
Frequency Division Multiplexing (OFDM), the selected modulation standard for PLC.
There exists various channel estimators for PLC in the literature. The former
techniques assume the channel noise is white Gaussian as in the wireless
multipath, while the newer ones model the corrupted noise as impulsive which
results with more complex receivers. In this study, the performance of the
Maximum A-Posteriori (MAP) estimator proposed for additive white Gaussian noise
channels is evaluated for PLC systems with OFDM under the constraint of
impulsive noise. For the simulations multipath channel data is taken from the
literature and Middleton Class A impulsive noise model is used. The results
show that the MAP estimator which is designed with the assumption of white
Gaussian noise has a satisfactory performance even under heavy impulsive noise.

Anahtar Kelimeler

Channel estimation, impulsive noise, Orthogonal Frequency Division Multiplexing, Power Line Communication

Kaynakça

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