Task ID: 1836.133, Naofal Al-Dhahir (UT-Dallas) and Brian L. Evans (UT-Austin) Energy-Efficient Signal Processing Techniques For Smart Grid Heterogeneous Communication Networks Task Description: Improve rate, reliability, and energy efficiency of two-way wireless and powerline communications (PLC) between smart meters & data concentrators in smart grids Anticipated Results: Signal processing algorithms and real-time prototypes to demonstrate enhanced performance of wireless and PLC transceivers for smart grids Co-PIs/Collaborators: Prof. N. Al-Dhahir (UT-Dallas) and Prof. B. L. Evans (UT-Austin) Current Students Mr. Mostafa Ibrahim Dr. Jing Lin Current Status Ph.D. (May 2017) Ph.D. (May 2014) Summer 2014 intern at TI Funding for three years: $360k Industrial Liaisons: Dr. Anuj Batra (TI), Dr. Anand Dabak (TI), Dr. Il Han Kim (TI), Dr. Tarkesh Pande (TI), and Dr. Khurram Waheed (Freescale) Task ID: 1836.133, Naofal Al-Dhahir (UT-Dallas) and Brian L. Evans (UT-Austin) Energy-Efficient Signal Processing Techniques For Smart Grid Task Title (This slide will be used for SRC members only) Heterogeneous Communication Networks Fig.1: Block diagram for narrowband-PLC / wireless diversity Impulsive noise mitigation in narrowband-PLC • • Proposed time-frequency modulation diversity at transmitter and a diversity demodulator at receiver to improve reliability without decreasing data rates Achieved over 1000x reduction in bit error rate in simulations using measured impulsive noise traces Fig.2: Time-frequency modulation diversity. Components of a diversity codeword are marked in the same color. Task ID: 1836.133, Naofal Al-Dhahir (UT-Dallas) and Brian L. Evans (UT-Austin) Energy-Efficient Signal Processing Techniques For Smart Grid Heterogeneous Communication Networks State of Art: Smart grid communications via narrowband PLC and wireless is interference limited. Prior studies on interference mitigation and PLC/wireless diversity do not fully exploit statistics of impulsive noise in PLC. Objectives: Enhance communication performance and reduce power consumption of smart grid communications systems. Novelty: • Narrowband-PLC/Wireless diversity • Time-frequency diversity modulation to combat impulsive noise in narrowband-PLC Accomplishments: • • Proposed maximum ratio combining that takes into account the impulsive noise variations Proposed time-frequency modulation diversity at transmitter and a diversity demodulator at receiver to improve reliability without decreasing data rates Fig. 1: Average bit error rate of PLC with and without diversity combining with a fixed-SNR (Eb/No=6 dB) wireless link Important Publications: 1. M. Sayed and N. Al-Dhahir, “Narrowband-PLC/Wireless Diversity for Smart Grid Communications,” IEEE Globecom, 2014. 2. J. Lin, T. Pande, I. H. Kim, A. Batra and B. L. Evans, ”TimeFrequency Modulation Diversity To Combat Periodic Impulsive Noise In Narrowband Powerline Communications'', IEEE TCOM, submitted. Fig.2: Time-frequency modulation diversity. Components of a diversity codeword (marked in the same color) are allocated to different subcarriers in different OFDM symbols.
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