A rate adaptive bit-loading algorithm for in-building power-line communications based on DMT-modulated systems

This paper deals with a variable rate discrete multitone modulation system for broadband power-line communications, based on the bit-loading algorithm proposed by Leke and Cioffi. In the proposed system a suitable least mean square channel estimator is considered, which is based on the insertion of a training sequence (TS). The proposed approach will be compared with the ideal channel estimates, showing its effectiveness. Moreover, different TS lengths will be compared. The system performance, expressed in terms of bit rate and bit-error rate, is derived by simulation with and without estimation errors. The propagation environment has been assumed as a frequency-selective multipath fading channel with additive colored Gaussian noise, according to the in-building networks model

[1]  Ezio Biglieri,et al.  Coding and modulation for a horrible channel , 2003, IEEE Commun. Mag..

[2]  Romano Fantacci,et al.  Comparison of CDMA and OFDM techniques for downstream power-line communications on low voltage grid , 2003 .

[3]  R. Gallager.  Information Theory and Reliable Communication , 1968 .

[4]  D. A. Bell,et al.  Information Theory and Reliable Communication , 1969 .

[5]  Bahram Honary,et al.  Power line communications: state of the art and future trends , 2003, IEEE Commun. Mag..

[6]  John M. Cioffi,et al.  A maximum rate loading algorithm for discrete multitone modulation systems , 1997, GLOBECOM 97. IEEE Global Telecommunications Conference. Conference Record.

[7]  H. Philipps.  Modelling of Powerline Communication Channels , 2006 .

[8]  Srinivas Katar,et al.  A comparative performance study of wireless and power line networks , 2003, IEEE Commun. Mag..

[9]  Romano Fantacci,et al.  Low-complexity pilot-aided data detection in MC-CDMA systems , 2003, GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489).

[10]  Robert F. H. Fischer,et al.  A new loading algorithm for discrete multitone transmission , 1996, Proceedings of GLOBECOM'96. 1996 IEEE Global Telecommunications Conference.

[11]  John M. Cioffi,et al.  A Discrete Multitone Transceiver System for HDSL Applications , 1991, IEEE J. Sel. Areas Commun..

[12]  John M. Cioffi,et al.  A practical discrete multitone transceiver loading algorithm for data transmission over spectrally shaped channels , 1995, IEEE Trans. Commun..

[13]  Philip J. Lin,et al.  "The time keepers" , 2003, IEEE Communications Magazine.