JavaScript is disabled for your browser. Some features of this site may not work without it.
| dc.contributor.author | Gebeyehu, Girma | |
| dc.date.accessioned | 2020-06-08T07:23:17Z | |
| dc.date.available | 2020-06-08T07:23:17Z | |
| dc.date.issued | 2019-10 | |
| dc.identifier.uri | http://hdl.handle.net/123456789/10963 | |
| dc.description.abstract | Power Line Communication (PLC) uses already existing powerlines to communicate data. As power lines are designed to carry electric power at low frequency, they are not suited for high speed data communication. Multipath induced frequency selective fading and Impulsive Noise (IN) are the primary challenges in PLC. To reduce the effect of multipath fading and IN, Orthoganal Frequency Division Multiplexing (OFDM) is commonly used in PLC. The success of OFDM to reduce IN effects is limited to low levels of IN energy, and for higher levels of IN energy, other IN mitigation techniques need to be applied. In this thesis, hybrid nonlinear preprocessing and Turbo coding are applied together to reduce the effect of IN in OFDM-PLC systems. Hybrid preprocessors consideredareoftwotype;conventionalhybridpreprocessing(CHP)andadaptive hybrid preprocessing (AHP). Error performances of the proposed dual mitigation techniques are studied via simulations using MATLAB. Bit Error Rate (BER) performance of Turbo coding paired with CHP and AHP is compared with the performance of Turbo coding paired with blanking and clipping separately, taking different levels of channel impulsiveness. The obtained results indicate that the proposed IN mitigation scheme results in reduced BER comparedtootherpreviouslyappliedcombinationsofTurbocodingandnonlinear preprocessing methods. It is also noted that, comparing all pairs, AHP combined with Turbo coding has the lowest BER for all channel conditions considered, and as a result the performance of OFDM-PLC systems would be better. | en_US |
| dc.language.iso | en | en_US |
| dc.subject | Communication Systems Engineering | en_US |
| dc.title | Impulsive Noise Mitigatin Using Turbo Coding and Hybrid Nonlinear Preprocessing In Ofdm-Plc Systems | en_US |
| dc.type | Thesis | en_US |
