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The wireless biomedical acquisition and transmission (Wibio'ACT) is a contributive project for real-time electrocardiogram (ECG) monitoring based on a special level-crossing analog-to-digital converter (LC-ADC). The authors present, as the first step in their design flow, modeling and simulation results of the converter in the presence of noise in ECG and comparator errors. Compared to pulse code...
A narrowband power line communications (NB-PLC) modem that can provide reliable and cost effective data communication capabilities is an ideal and natural solution to Smart Grids communication needs. In this paper, a NB-PLC modem design using highly efficient digital signal processor (DSP) is proposed. This design adopts a coding modulation scheme consisting the use of permutations code combined with...
Combining Multiple Frequency Shift Keying (M-FSK) modulation and permutation codes has been used to make power line communications (PLC) robust against narrowband noise disturbance and impulse noise. However, the conventional hard decoding of permutation codes is lacking of stability in frequency selective channel since it depends on threshold comparison with every M-FSK envelope detector. In this...
This paper describes the design of advanced physical layer for narrowband power line communications (NB-PLC) based on coded modulation. The coding modulation scheme is described and decoding process based on soft decoding is proposed. Using this innovative scheme, the decoder performs a gain of 3 dB at symbol error rate (SER) equal to 10−3 over traditional receiver with hard decoding. In the implementation...
A Narrowband Power Line Communication (NB-PLC) modem that can provide reliable and cost effective data communication capabilities is an ideal and natural solution to Smart Grids communication needs. In this paper, authors proposed the design and experimental validation of a robust 9.6 kbps NB-PLC modem. The design methodology of a narrowband S-FSK based PLC modem with optimized physical layer is first...
With the advancement in various fields of energy and communication sector, there is a strong need to achieve simple and reliable data transmission that will enable various entities connected to the Smart Grids (SG) to exchange vital information at all times. This paper propose a transmission scheme combining spread frequency shift keying (S-FSK) modulation with a low-density parity-check (LDPC) code...
When using power line communications (PLC) modems for Smart Grids (SG), achieving fast and reliable data transmission is one of the key issues. This paper investigate a soft Viterbi decoder to reduce errors effects of noises and attenuations in Spread Frequency Shift Keying (S-FSK) communication scheme. Through numerical simulations, the improvements of the proposed Viterbi decoder are shown in terms...
This paper presents the design of an appropriate coupling interface circuit for measuring indoor power line transmission channel characteristics in CENELEC/FCC/ARIB low-frequency bands. This coupling circuit prevents the powerful and damaging 50 Hz/220 V current from entering sensitive measurement equipments while allowing narrowband PLC signals reception. It also guarantees impedance matching and...
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