Power line communication systems

Details Power line communication systems Power line communication systems

1997-09-10

1999-09-14

Hofsass, Jeffery

Communications: electrical

Systems

Selsyn type

34031003, 34031006, 34031007, H04M 1104

Patent

active

059529148

ABSTRACT:
Two duplex channels are provided using only three lines, two power lines and one neutral line. The transmitter/receiver of each duplex channel includes adaptive filters to cancel cross-coupling introduced by the common neutral line. Each channel is coupled to a power line using a hybrid line driver/receiver device. The hybrid line driver/receiver device includes an echo canceller and a bridge circuit to allow transmitting and receiving signals to and from a single power line with minimized echoing effects. The signal-to-noise ratios of each duplex channel is significantly increased so that two duplex channels may be implemented using only three wire connections. Thus, the communication capacity of power line communication systems is greatly increased compared to that for a single 2-wire channel.

REFERENCES:
patent: 3942168 (1976-03-01), Whyte
patent: 4060735 (1977-11-01), Pascucci et al.
patent: 4142178 (1979-02-01), Whyte et al.
patent: 4311964 (1982-01-01), Boykin
patent: 4475193 (1984-10-01), Brown
patent: 4479215 (1984-10-01), Baker
patent: 4510611 (1985-04-01), Dougherty
patent: 4514594 (1985-04-01), Brown et al.
patent: 4633218 (1986-12-01), Palsgrove et al.
patent: 5066939 (1991-11-01), Mansfield, Jr.
patent: 5257006 (1993-10-01), Graham et al.
patent: 5391932 (1995-02-01), Small et al.
patent: 5404127 (1995-04-01), Lee et al.
patent: 5491463 (1996-02-01), Sargeant et al.
patent: 5581229 (1996-12-01), Hunt
patent: 5684450 (1997-11-01), Brown
patent: 5691691 (1997-11-01), Merwin et al.
patent: 5694108 (1997-12-01), Shuey
"Power-Line Carrier Systems", Authors:T.M. Swingle & H.I. Dobson, Chapter 14, pp. 14-19.
"A Model For Communication Signal Propagation On Three Phase Power Distribution Lines", Authors: M.E. Hardy, S. Ardlan, J.B. O'Neal, Jr., L.J. Gale & K.C. Shuey, IEEE Transactions on Power Delivery, vol. 6, No. 3, Jul. 1991, pp. 966-972.
"Decoupling Networks For Promoting Power Line Carrier Systems"; Author: K.S. Murthy; IEEE Transactions on Power Delivery, vol. 10, No. 2, Apr. 1995, pp. 580-587.
"Power-Line Noise Survey", Author: A. A. Smith, Jr., IEEE Transactions On Electromagnetic Compatibility, vol. T-EMC, Feb. 1972, pp. 31-32.
"Transmission Lines and Waveguides"; Author: R.V. Lowman, of book; Chapter 42, pp. 42-1-42-6.
"Coupled Transmission Line Networks in a Inhomogeneous Dielectric Medium"; Authors: G.I. Zysman & A.K. Johnson, IEEE Transactions on Microwave Theory and Techniques, vol. MTT-17, No. 10, Oct. 1969, pp. 753-759.
"IEEE Guide for Power-Line Carrier Applications", Institute of Electrical and Electronics Engineers, NY, NY, Committee of IEEE Power Eng. Society; Sponsor: Power System Communications, IEEE Standard 643-1980, Jan. 30, 1981, ANSI, pp. 2-63.

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