Abstract:
Power line communication (PLC) system is evolving as a ubiquitous
communication system for high speed broadband data communication. Multicarrier
DS-CDMA (MC-DS-CDMA) technique is an attractive technique in achieving high
data-rate transmission in wireless communication. In this thesis investigations are
carried out to combine the MC-DS-CDMA technology with the features and
characteristics of a PLC system. To find the effectiveness of MC-DS-CDMA system
in a power line channel, a system model is proposed for high speed data
communication through a power line channel using the DS-CDMA with multicarrier
orthogonal FDM (OFDM) technique. Analysis is carried out by considering the
combined effect of power line impulsive noise, channel transfer function, effect of
load impedances and the number of branches in a PLC network without and with path
diversity using rake receiver. Expressions of signal to interference and noise ratio and
bit error rate (BER) at output of CDMA receiver are developed considering the above
limitations. BER performance results are evaluated for different system parameters,
channel parameters, processing gain, number of OFDM carriers and number of rake
fingers. For a given performance level, the optimum values of system parameters like
number of OFDM subcarriers, code length, number of rake fingers for a given system
length, number of branches and load impedances are determined.
