A rate adaptive bit-loading algorithm for a DMT modulation system for in-building power-line communications

This paper deals with a variable rate discrete multi-tone modulation (DMT) system for broadband power-line communications (PLCs), based on the bit-loading algorithm proposed by Leke and Cioffi. In the proposed system a suitable LMS channel estimator is considered, which is based on the insertion of...

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Bibliographic Details
Published in:GLOBECOM '05. IEEE Global Telecommunications Conference, 2005 Vol. 1; p. 5 pp.
Main Authors: Morosi, S., Marabissi, D., Del Re, E., Fantacci, R., Del Santo, N.
Format: Conference Proceeding
Language:English
Published: IEEE 2005
Subjects:
Additive noise
Bit error rate
Broadband communication
Estimation error
Fading
Frequency estimation
Gaussian noise
Least squares approximation
OFDM modulation
Programmable control
ISBN:0780394143, 9780780394148
ISSN:1930-529X
Online Access:Get full text
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Summary:This paper deals with a variable rate discrete multi-tone modulation (DMT) system for broadband power-line communications (PLCs), based on the bit-loading algorithm proposed by Leke and Cioffi. In the proposed system a suitable LMS 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 performance of the system, expressed in terms of bit-rate and bit error rate (BER), with and without an estimation error is derived by simulation under the assumption of frequency-selective multipath fading channel and additive colored Gaussian noise, according to the in-building networks model.
ISBN:0780394143
9780780394148
ISSN:1930-529X
DOI:10.1109/GLOCOM.2005.1577658