A permutation coding and OFDM-MFSK modulation scheme for power-line communication
Date
2015-03
Authors
Ndlovu, Mpendulo Mike Comfort
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Abstract
Power-line communication offers a networking communication over existing
power lines and finds important applications in smart grid, home and business
automation and automatic meter reading. However, the power-line channel
is one of the harshest known communication channels currently in use and
it requires robust forward error correction techniques. Powerful decoding algorithms
tend to be complex and increase latency while robust modulation
schemes offer lower data rates and reduced spectral efficiency. The presented
research is a frequency domain error-correcting scheme that extends the existing
narrowband power-line communication forward error correction concatenated
scheme of Reed-Solomon and Convolutional codes in the OFDM framework.
It introduces a combination of M-ary phase shift keying as an OFDM
subcarrier modulation scheme and a permutation sequence encoding between
subcarriers to combat narrowband interference and carrier frequency offsets
by introducing frequency diversity. The scheme offers improved BER performance
over OFDM and OFDM-MFSK in high narrowband disturbance and
impulse noise probability channels and improves the performance of OFDM in
the presence of carrier frequency offsets.