WireNet: An Experimental System for In-House Power Line Communication

EURASIP J. Adv. Signal Process.

2007

We consider a bit-interleaved coded wideband impulse-modulated system for power line communications. Impulse modulation is combined with direct-sequence code-division multiple access (DS-CDMA) to obtain a form of orthogonal modulation and to multiplex the users. We focus on the receiver signal processing algorithms and derive a maximum likelihood frequency-domain detector that takes into account the presence of impulse noise as well as the intercode interference (ICI) and the multiple-access interference (MAI) that are generated by the frequency-selective power line channel. To reduce complexity, we propose several simplified frequency-domain receiver algorithms with different complexity and performance. We address the problem of the practical estimation of the channel frequency response as well as the estimation of the correlation of the ICI-MAI-plus-noise that is needed in the detection metric. To improve the estimators performance, a simple hard feedback from the channel decoder is also used. Simulation results show that the scheme provides robust performance as a result of spreading the symbol energy both in frequency (through the wideband pulse) and in time (through the spreading code and the bit-interleaved convolutional code).

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Wideband Impulse Modulation and Receiver Algorithms for Multiuser Power Line Communications

EURASIP J. Adv. Signal Process.

2007

“…The frequency response of the th derivative of the Gaussian pulse reads (3) where denotes the Fourier transform operator. In particular, we note that (3) is maximum at the frequency (4) We consider the two frequencies for which (3) falls 10 dB below its maximum. We denote them as and , and we note that in the case of the Gaussian pulse.…”

Section: A Gaussian Pulse-shape Designmentioning

confidence: 99%

“…The first attempt toward the use of I-UWB in PLC was investigated in the European project Wirenet [4]. Practical receiver algorithms for in-home multiuser high-speed I-UWB communications in the IH scenario were studied in [5] and, more recently, the application of I-UWB for outdoor low-voltage PLC was analyzed in [6].…”

Section: Introductionmentioning

confidence: 99%

Multitechnology (I-UWB and OFDM) Coexistent Communications on the Power Delivery Network

IEEE Trans. Power Delivery

Versolatto

Girotto

2013

To improve the performance and to support novel command and control applications in the smart-grid context, novel or alternative transmission schemes can be used in combination with existent power-line communication (PLC) solutions that are based on multicarrier or narrowband single carrier modulation schemes. In this respect, it is fundamental to ensure the coexistence between different systems yet respecting electromagnetic-compatibility (EMC) constraints. We consider the deployment of impulsive-ultrawideband (I-UWB) modulation for low-data-rate PLC. First, we study the design of the modulation parameters as a function of the application scenario. We consider the in-home, the outdoor low-voltage, and the outdoor medium-voltage scenario. Furthermore, we discuss EMC aspects and, according to the norms, we derive the limits for the power spectral density of the I-UWB signal. Then, we study the coexistence between existing orthogonal frequency-division multiplexing (OFDM) PLC solutions and I-UWB when they (partly) share the spectrum. We focus on the physical layer and we perform the analysis in terms of maximum achievable rate. The results show that I-UWB is suitable for low-data-rate applications and, further, it can coexist with existing OFDM PLC systems. Index Terms-Coexistence, multicarrier modulation, power-line communications (PLC), ultra-wideband (UWB) communications. 0885-8977 © 2013 IEEE

“…Direct sequence data spreading can also be used [7]. The training frames can have longer duration than the data frames to allow for accurate channel estimation [6]. …”

Section: Impulse Modulated System Modelmentioning

confidence: 99%

Soft detection with synchronization and channel estimation from hard quantized inputs in impulsive UWB Power Line Communications

2009 IEEE International Conference on Ultra-Wideband

Palermo²

2009

We consider an Ultra Wide Band Power Line Communication system that deploys binary impulse modulation. We propose a simple matched filter receiver that uses one-bit quantized input samples for frame synchronization and soft channel estimation with data training. Data detection can still use unquantized (soft) inputs. The proposed algorithm has low complexity and it requires less memory and computational power than the unquantized maximum likelihood synchronization algorithm. It produces small excess noise w.r.t. the unquantized algorithm for low signal-to-noise ratios. Simulation results over highly frequency selective PLC channels confirm that also the biterror-rate performance penalty is small.