Abstract
AbstractIn this paper different spread spectrum systems are proposed for broadband downstream power‐line communications (PLCs). Orthogonal frequency division multiplexing (OFDM) technique permits to greatly enhance the system throughput but can be strongly damaged by ‘hidden nodes’ situations. The introduction of suitable hybrid schemes, such as MT‐CDMA, allows to efficiently face this inconvenience by increasing system robustness.The performance of the systems considered is expressed in terms of bit error rate (BER), derived by simulations under the assumptions of frequency‐selective multipath fading channel and additive coloured gaussian noise according to the in‐building networks model, under the same overall working conditions of bandwidth occupation, transmitted power and global data rate. Copyright © 2003 John Wiley & Sons, Ltd.
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