Tsuken Electrical Industrial Co.

Izumi, Japan

Tsuken Electrical Industrial Co.

Izumi, Japan

Time filter

Source Type

Sasaki N.,Tohoku Electric Power Co. | Seino K.,Tsuken Electrical Industrial Co. | Hanaumi T.,Tsuken Electrical Industrial Co. | Oda T.,Tsuken Electrical Industrial Co. | Adachi F.,Tohoku University
IEEJ Transactions on Electronics, Information and Systems | Year: 2012

This paper conducted experiments to model the channel for digital transmission based on the analysis of the experimental results obtained, and revealed the characteristics of propagation loss, characteristics of delay path profile and the noise characteristics of the power line carrier system that uses power transmission lines. In terms of the characteristics of propagation loss, experimental results were subjected to multiple regression analysis and an equation to estimate propagation loss was derived with useful parameters. With the characteristics of delay path profile, additional loss of the delay path was modeled and clarified. It was indicated that delay path travel both by in-phase propagation and out-phase propagation, thus it is important to consider these two propagation characteristics when modeling. With the noise characteristics, it was indicated that they are superposition characteristics of thermal noise and impulse noise and these two characteristics were modeled based on theoretical examination and the cumulative probability distribution. Simulations using these derived models agreed well with the measurement results, indicating these models will be practical for use. © 2012 The Institute of Electrical Engineers of Japan.


Sasaki N.,Tohoku Electric Power Co. | Hanaumi T.,Tsuken Electrical Industrial Co. | Oda T.,Tsuken Electrical Industrial Co. | Adachi F.,Tohoku University
IEEJ Transactions on Electronics, Information and Systems | Year: 2014

In this paper, we propose a transversal adaptive equalizer using the least mean squares (LMS) algorithm for digital power line carrier systems and discuss about the optimal number of taps, the step size parameters, and the achievable bit error rate (BER) performance. First, we present two power line models: Model 1 with a line trap on the power line branch and Model 2 without a line trap on the branch. Then, we present theoretical analysis and the computer simulation results. In the case of Model 1, the sufficient number of taps is around 12, while in the case of Model 2, it increases to 21. This is because a line trap in the case of Model 1 can suppress the electric energy of the delay path. It is desirable to change the step size parameter μ in the training and tracking modes in order to achieve fast mean square error (MSE) convergence rate and a good BER performance; i.e., a relatively large value of μ=0.01 should be used in the training mode while a small value of μ=0.001 should be used in the tracking mode. © 2014 The Institute of Electrical Engineers of Japan.


Sasaki N.,Tohoku Electric Power Co. | Hanaumi T.,Tsuken Electrical Industrial Co. | Oda T.,Tsuken Electrical Industrial Co. | Adachi F.,Tohoku University
IEEJ Transactions on Electronics, Information and Systems | Year: 2016

An adaptive equalizer is adopted in a high speed digital power line carrier system. A surge noise is produced in a digital power line carrier system by opening and closing operations of an electrical equipment. This surge noise causes a serious problem, which is the divergence of tap coefficient of adaptive equalizer. In this paper, we propose a simple tap coefficient divergence prevention scheme and confirm its effectiveness by an experiment. © 2016 The Institute of Electrical Engineers of Japan.

Loading Tsuken Electrical Industrial Co. collaborators
Loading Tsuken Electrical Industrial Co. collaborators