M. Tanaka

Bio: M. Tanaka is an academic researcher from Toyohashi University of Technology. The author has contributed to research in topics: Noise spectral density & Mismatch loss. The author has an hindex of 1, co-authored 1 publications receiving 98 citations.

High frequency noise power spectrum, impedance and transmission loss of power line in Japan on intrabuilding power line communications

Abstract: A communication system for small-scale local area networks using the power transmission line is discussed. With this application in mind and noise power spectrum of a power line at 10 kHz-100 MHz and the impedance characteristics and transmission loss of a power line in the high frequency band (10 kHz-20 MHz) have been measured. Both narrowband and wideband data transmission are considered. The transmission loss of the power line increases with frequency, whereas the intensity of the noise power spectrum decreases rapidly. This means that power line communication by a single-sideband system is possible using a wide frequency band up to 100 MHz. However, the noise, impedance, and transmission characteristics vary greatly with frequency, so special considerations such as line impedance stabilization networks and other techniques are necessary. >

Analysis and modeling of impulsive noise in broad-band powerline communications

Abstract: Contrary to many other communication channels, the powerline channel does not represent an additive white Gaussian noise environment. In the frequency range from several hundred kilohertz up to 20 MHz, it is mostly dominated by narrow-band interference and impulsive noise. In particular, the impulsive noise introduces significant time variance into the powerline channel. Spectral analysis and time-domain analysis of impulsive noise give some figures of the power spectral density as well as distributions of amplitude, impulse width, and "interarrival" times in typical powerline scenarios. Furthermore, the impulse rate and the disturbance ratio of the scenarios are examined. Finally, a statistical model of the time behavior of random impulsive noise based on a partitioned Markov chain is developed, which is suitable for implementation in computer-based communication system simulations.

Power line communications: state of the art and future trends

Abstract: This article constitutes an overview of the research, application, and regulatory activities on power line communications. Transmission issues on the power line are investigated and modeling approaches illustrated. Contemporary communication techniques and reliability issues are treated. A description of regulatory activities worldwide is given. Finally, market perspectives and promising applications are covered to assess the viability of this communications environment.

Power line communication system and method of operating the same

Abstract: The present invention provides a system for operating a power line communications system that is comprised of a plurality of network elements, which may take the form of repeaters, bypass devices, backhaul devices, wireless backhaul devices, enhanced bypass device, communication interface devices and others. In one embodiment, two groups of network elements in the same electrical distribution system are isolated except selected communication link.

Device and method for coupling with electrical distribution network infrastructure to provide communications

Abstract: A device for providing communications through power lines that are communicatively coupled to an electrical distribution network infrastructure and to the internal wiring of at least one customer premises having one or more communication devices therein is provided. One embodiment comprises a coupler configured to be coupled to the electrical distribution network infrastructure, a modem in communication with the coupler to communicate data through the power lines; and a wireless transceiver in communication with said modem. In some embodiments, the electrical distribution network infrastructure may be a structure that uses electricity, such as a street light.

Local area network of serial intelligent cells

Abstract: A serial intelligent cell (SIC) and a connection topology for local area networks using Electrically-conducting media. A local area network can be configured from a plurality of SIC's interconnected so that all communications between two adjacent SIC's is both point-to-point and bidirectional. Each SIC can be connected to one or more other SIC's to allow redundant communication paths. Communications in different areas of a SIC network are independent of one another, so that, unlike current bus topology and star topology, there is no fundamental limit on the size or extent of a SIC network. Each SIC can optionally be connected to one or more data terminals, computers, telephones, sensors, actuators, etc., to facilitate interconnectivity among such devices. Networks according to the present invention can be configured for a variety of applications, including a local telephone system, remote computer bus extender, multiplexers, PABX/PBX functionality, security systems, and local broadcasting services. The network can use dedicated wiring, as well as existing wiring as the in-house telephone or electrical wiring.