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Performance Analysis of Orthogonal Multiplexing Techniques for PLC Systems with Low Cyclic Prefix Length and Symbol
Túlio Fernandes Moreira1, Ândrei Camponogara2, Sobia Baig3
1Department of Electrical Engineering, Federal University of Juiz de Fora, Juiz de Fora 36036-900, Brazil.
Sensors (Basel, Switzerland)
|May 13, 2023
Summary
This study analyzes interference in narrowband power line communication (PLC) systems, comparing Hermitian symmetric orthogonal frequency division multiplexing (HS-OFDM) and other schemes. It offers methods to improve data rates and reduce errors in PLC networks.
Area of Science:
- Electrical Engineering
- Communications Engineering
- Signal Processing
Background:
- Narrowband power line communication (PLC) systems face performance degradation due to interference.
- Cyclic prefix (CP) violation and symbol timing offset (STO) are key sources of interference in PLC.
Purpose of the Study:
- To present a unified formulation for analyzing various OFDM-based schemes in PLC.
- To quantify interference effects and evaluate system performance under diverse conditions.
- To provide guidance for optimizing PLC systems with different constraints.
Main Methods:
- Developed a unified mathematical framework for HS-OFDM, OCDM, SCCP, and OTFDM.
- Derived closed-form expressions for interference quantification with frequency domain equalization.
- Conducted numerical analyses across various communication scenarios.
Main Results:
- Performance of HS-OFDM, OCDM, SCCP, and OTFDM evaluated under different channel conditions and noise models.
- Impact of channel state information, interference, equalizer type, and resource allocation analyzed.
- Achievable data rates and bit error probabilities quantified.
Conclusions:
- The unified formulation simplifies the analysis and comparison of different PLC schemes.
- Closed-form expressions and performance analyses offer practical guidance for PLC system design.
- Results encourage the development of flexible multi-scheme transceivers for enhanced PLC.
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