Title :
Coded Frequency Modulation with RLL Sequences for CENELEC Band Applications
Author :
Mengi, Anil ; Vinck, A. J Han
Author_Institution :
Duisburg-Essen Univ., Essen
Abstract :
This paper addresses low frequency range power-line communications (PLC), where the transmitters are output voltage and bandwidth limited. We propose an efficient transmission method of combining Reed Solomon (RS) coding with run length limited (RLL) codes. Our proposed transmission model consists of three main parts: RS encoder followed by a one or two bit(s) look-ahead RLL encoder and 2-FSK modulator. The resulting transmission has a constant envelope signal modulation, no bandwidth expansion and more concentrated spectra in the carrier frequencies. This is an important result, directly applicable to the CENELEC band. In addition, a soft decoder based on minimum distance criteria for the RLL codes is introduced to yield an additional coding gain. We present the spectral analysis of RLL coding. Finally, the performance of the detectors is analyzed theoretically as well as through simulations.
Keywords :
Reed-Solomon codes; carrier transmission on power lines; frequency shift keying; modulation coding; runlength codes; sequences; spectral analysis; CENELEC band application; FSK modulator; RLL encoder; RS encoder; Reed Solomon coding; coded frequency modulation; constant envelope signal modulation; look-ahead coding; low frequency range power-line communication; minimum distance criteria; run length limited code sequence; soft decoder; spectral analysis; Bandwidth; Decoding; Detectors; Frequency modulation; Performance analysis; Programmable control; Reed-Solomon codes; Spectral analysis; Transmitters; Voltage; FSK modulation; RLL code; Reed-Solomon coding; look-ahead coding;
Conference_Titel :
Power Line Communications and Its Applications, 2007. ISPLC '07. IEEE International Symposium on
Conference_Location :
Pisa
Print_ISBN :
1-4244-1090-8
Electronic_ISBN :
1-4244-1090-8
DOI :
10.1109/ISPLC.2007.371111
