Method and device for amplification of data signals over power lines

• US 7,358,808 B2
• Filed: 06/21/2005
• Issued: 04/15/2008
• Est. Priority Date: 06/21/2005
• Status: Expired due to Fees

• Current Assignee: Current Technologies LLC (Pattern Inc.)
• Original Assignee: Current Technologies LLC (Pattern Inc.)
• Inventors: Berkman, William H.
• Primary Examiner(s): Choe; Henry
• Application Number:
  US11/156,612
• Publication Number:
  US 20070001821A1
• Time in Patent Office: 1,029 Days
• Field of Search: 330/250, 330/123, 330/302, 330/306, 330/310
• US Class Current: 330/250
• CPC Class Codes: H04B 2203/5441 Wireless systems or telephone
• CPC Class Codes: H04B 2203/5445 Local network
• CPC Class Codes: H04B 2203/5491 using filtering and bypassing
• CPC Class Codes: H04B 3/542 the information being in digital form

Abstract

A device for bi-directional amplification of data signals over power lines is disclosed. In one embodiment, the device includes a bandpass filter, a frequency converter and an amplifier. The bandpass filter filters out undesired frequencies and the frequency converter converts the frequency band of the data signals to a different frequency band. The output of the filter is provided to the amplifier for amplifying the frequency converted data signals for transmission over power line.

Claims

1. A device for amplifying data signals on an electric distribution network that includes a power line conductor, comprising:

a filter having an input port and an output port,

wherein said input port is configured to be directly coupled to the power line conductor;

an amplifier having an input port and an output port;

wherein said amplifier output port is configured to be directly coupled to the power line conductor;

a frequency converter (FC) having an input port and an output port; and

wherein said FC input port is communicatively coupled to said filter output port and said FC output port is communicatively coupled to said amplifier input port.

2. The device of claim 1, wherein said FC converts the frequency of the data signal from a first frequency to a second frequency.

3. The device of claim 2, wherein said first frequency is orthogonal to said second frequency.

4. The device of claim 2, wherein said first frequency and said second frequency are separated by a guard band.

5. The device of claim 1, wherein the gain of said amplifier is dependent upon the carrier frequency of said data signal.

6. The device of claim 1, wherein said amplifier is configured to predistort the data signal.

7. The device of claim 1, wherein said amplifier includes signal conditioning circuitry to condition the data signal after amplification of the data signal communication.

8. The device of claim 7, wherein said signal conditioning circuitry includes an anti-aliasing filter.

9. The device of claim 7, wherein said signal conditioning circuitry includes a noise filter.

10. The device of claim 1, wherein said input port of said filter is configured to be communicatively coupled to the power line via an inductive coupler.

11. The device of claim 1, wherein said input port of said filter is configured to be communicatively coupled to the power line via a capacitive coupler.

12. The device of claim 1, wherein said amplifier is configured to pre-emphasize to the data signal.

13. The device of claim 12, further comprising a power supply comprising a transformer configured to draw power from the power line and to supply power to said amplifier.

14. The device of claim 1, further comprising a buffer communicatively coupled to said first FC output port and said first amplifier input port.

15. The device of claim 14, wherein said buffer is configured to buffer an Internet Protocol packet.

16. The device of claim 14, wherein said buffer is configured to buffer a relay frame.

17. The device of claim 14, wherein said buffer is configured to buffer a Transmission Control Protocol datagram.

18. The device of claim 1, further comprising:

a switch having an input port and an output port; and

wherein said switch input port is communicatively coupled to the power line and wherein said switch output port is communicatively coupled to said filter input port.

19. The device of claim 18, wherein said switch is configured for operation in an open state and a closed state.

20. The device of claim 18, wherein said switch acts in conjunction with said amplifier.

21. The device of claim 20, wherein said switch engages in said open state when said amplifier is transmitting.

22. The device of claim 21, wherein said switch engages in said closed state when said amplifier is not transmitting.

23. A device for amplifying data signal on an electric distribution network that includes a power line conductor, comprising:

a first switch and a second switch, said switches having an open state and a closed state, said switches having an input port and an output port, each of said switches having its input port directly coupled to the power line conductor;

a first filter and a second filter, said filters having an input port and an output port, said input port of said first filter communicatively coupled to said output port of said first switch, said input port of said second filter communicatively coupled to said output port of said second switch;

a first frequency converter (FC) and a second FC, said FCs having an input port and an output port, said input port of said first FC communicatively coupled to said output port of said first filter, said input port of said second FC communicatively coupled to said output port of said second filter; and

a first amplifier and a second amplifier, said amplifiers having an input port and an output port, said input port of said first amplifier communicatively coupled to said output port of said first FC, said input port of second amplifier communicatively coupled to said output port of said second FC, said output ports of said first and said second amplifiers directly coupled to the power line conductor.

24. The device of claim 23, wherein said FCs convert the frequency band of the data signals from a first frequency to a second frequency.

25. The device of claim 23, wherein the power line conductor is a medium voltage power line.

26. The device of claim 23, wherein an output from said output port of said first FC is orthogonal to an output from said output port of said second FC.

27. The device of claim 23, wherein an output from said output port of said first FC and an output from said output port of said second FC are separated by a guard band.

28. The device of claim 23, wherein said first switch acts in conjunction with said second amplifier.

29. The device of claim 28, wherein said second switch acts in conjunction with said first amplifier.

30. The device of claim 23, wherein said first switch engages in said open state when said second amplifier is transmitting.

31. The device of claim 30, wherein said second switch engages in said open state when said first amplifier is transmitting.

32. The device of claim 31, wherein said first switch engages in said closed state when said second amplifier is not transmitting.

33. The device of claim 32, wherein said second switch engages in said closed state when said first amplifier is not transmitting.

34. An array of N amplification devices for amplifying data signals on a power line, wherein each of said amplification devices is characterized by a unique transmitting frequency f band, each of said amplification devices comprising:

a switch configured for operating in an open state and a closed state, said switch having an input port and an output port, each switch having its input port directly coupled to the power line conductor;

a filter having an input port and an output port, said input port of said filter directly coupled to said output port of said switch;

a frequency converter (FC) having an input port and an output port, said input port of said FC communicatively coupled to said output port of said filter; and

an amplifier having an input port and an output port, said input port of said amplifier communicatively coupled to said output port of said FC, said output port of said amplifier directly coupled to the power line conductor;

wherein each of said unique transmitting frequencies f is orthogonal to each of said other frequencies.