Title :
Combined Higher Order Spectral Nulls Codes and OFDM Modulation for Power Line Communications
Author :
Ouahada, K. ; Ferreira, H.C. ; Vinck, A. J Han ; Clarke, W.A.
Author_Institution :
Dept. of Electr. & Electron. Eng. Sci., Johannesburg Univ.
Abstract :
We present different techniques for designing codes with higher order spectral nulls, based on the power spectral density function; the binary representation of permutation codes and the finite state machine representation. Distance increasing mappings (a technique for mapping convolutional code outputs onto constrained symbols) is applied to generate codes with a certain power spectral density function and enhanced error correction capabilities. Combining this class of new codes with an OFDM modulation scheme is a very strong candidate-coding scheme for non-AWGN channels such as the power line communications channel
Keywords :
OFDM modulation; carrier transmission on power lines; channel coding; error correction codes; modulation coding; telecommunication channels; OFDM modulation; convolutional code; error correction capabilities; finite state machine representation; higher order spectral nulls codes; nonAWGN channels; permutation codes; power line communications; power spectral density function; Additive white noise; Background noise; Density functional theory; Fading; Gaussian noise; Interference; Null value; OFDM modulation; Power line communications; Programmable control;
Conference_Titel :
Power Line Communications and Its Applications, 2006 IEEE International Symposium on
Conference_Location :
Orlando, FL
Print_ISBN :
1-4244-0113-5
DOI :
10.1109/ISPLC.2006.247448
