Robustness Evaluation of OFDM and MC-DS-CDMA Systems in Digital High Voltage Power Line Communication Systems by Using LS Channel Estimation Technique

In this paper OFDM and MC-DS-CDMA techniques performances in down-stream (downlink) high voltage digital PLC (HV dPLC) system have been studied under the same overall working conditions (i.e., transmitted power and global data rate). By using MC-DS-CDMA we have a compromise between SNR and transmission bandwidth. However, by increasing the number of users we can attain a higher data rates for a given bandwidth. Comparisons show that by using least square (LS) channel estimation and comb type pilot frame format, MC-DS-CDMA outperforms OFDM under the same conditions at lower SNRs.