BPL_2

PLC Power Line Communication: 

Broadband Over Power Lines PLC Power Line Communication

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Broadband Over Power Lines

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Broadband Over Power Lines

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Broadband Over Power Lines

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Broadband Over Power Lines

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Broadband Over Power Lines In summary, Broadband can be provided by: Wired connections: Telephone (POS), Cable (POS) Wireless: Satellite (WAN), WiFi (LAN) Optical Fiber (POS) Now enjoy Internet with PLC New Internet Connection

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NTIA Report 04-413, Potential Interference From Broadband Over Power Line (BPL) Systems To Federal Government Radiocommunications AT 1.7 - 80 MHz, Phase 1 Study - U.S. DEPARTMENT OF COMMERCE, National Telecommunications and Information Administration Broadband Over Power Lines Delta

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NTIA Report 04-413, Potential Interference From Broadband Over Power Line (BPL) Systems To Federal Government Radiocommunications AT 1.7 - 80 MHz, Phase 1 Study - U.S. DEPARTMENT OF COMMERCE, National Telecommunications and Information Administration Broadband Over Power Lines Delta

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NTIA Report 04-413, Potential Interference From Broadband Over Power Line (BPL) Systems To Federal Government Radiocommunications AT 1.7 - 80 MHz, Phase 1 Study - U.S. DEPARTMENT O Broadband Over Power Lines Delta

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NTIA Report 04-413, Potential Interference From Broadband Over Power Line (BPL) Systems To Federal Government Radiocommunications AT 1.7 - 80 MHz, Phase 1 Study - U.S. DEPARTMENT OF COMMERCE, National Telecommunications and Information Administration Broadband Over Power Lines Wye

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BPL and HF – A Primer © ARRL 2004 Broadband Over Power Lines

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BPL and HF – A Primer © ARRL 2004 Broadband Over Power Lines

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Broadband Over Power Lines

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Broadband Over Power Lines Analog Modulation

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Broadband Over Power Lines Analog Modulation QAM @ www.williamson-labs.com

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Broadband Over Power Lines Projected BPL Carrier frequencies are 1.7 MHz to 80 MHz.

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Broadband Over Power Lines

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Broadband Over Power Lines A COMMUNICATIONS NETWORK WITHOUT T1 PHONE SYSTEM RFL 9745 RFL 9785 HCB Network PHONE SYSTEM RFL 9745 RFL 9785 HCB LAN ANALOG TIE LINES Analog/Digital LINE POWER LINE PILOT WIRES DIGITAL LINE DTT DTT DCB DCB PBX PBX PBX OPX OPX OPX DATA DATA RFL 9720 RFL 9720 Introduction to Digital Methods

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Broadband Over Power Lines Analog to Digital Conversion PCM TDM

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Broadband Over Power Lines T1 LINK T1 MUX T1 MUX DTT DCB HCB DATA OPX OPX OPX DTT DCB HCB DATA OPX OPX OPX A COMMUNICATIONS NETWORK WITH T1 Fully Digital Communication

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Broadband Over Power Lines 64 Kbps 64 Kbps . . . . . . . . TDM MUX 64 Kbps 64 Kbps . . . . . . . . TDM MUX 1 24 1 24 ...................... 1 24 1.544 Mbps AGGREGATE T IME D IVISION M ULTIPLEXING (TDM) Voice sampled 8000x/sec x 8 bits/sample x 24 time slots ~ 1,536,000 + framing bits = 1,544,000 bits/sec Fully Digital Communication

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Broadband Over Power Lines Fully Digital above – separate channels to avoid collision Digital Modulation below – separate frequencies to avoid collision

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Broadband Over Power Lines T1 Repeater

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Broadband Over Power Lines BPL Injector / Repeater

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Broadband Over Power Lines Modulation can be done onto a Higher Frequency Carrier

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Broadband Over Power Lines 60 Hz AC with 1.4 MHz AM above, with PCM below left (as in DSL), and below right for BPL

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Broadband Over Power Lines Projected BPL Carrier frequencies are 1.7 MHz to 80 MHz. < 30 MHz - Conducted energy. Field detection by Magnetic field. > 30 MHz - Conducted And Radiated energy. Field detection by Electric field.

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Broadband Over Power Lines OFDM – Orthogonal Frequency Division Modulation Many carriers at (relatively) slow bit rate transmitted, When received they are demodulated and multiplexed. (for any wireless hop) “ Victim Receiver ” most likely in “Near Field” (3λ +/-) “Victim Receiver” studies do not involve effects on people because BPL is covered by FCC Part 15, which implies that it does not “radiate” , and further, any radiation is well below “Thermal Limits”.

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Broadband Over Power Lines BPL is covered under FCC Regulations, Part 15, which implies that the information will not radiate, However, the FCC overlooked some details . . .

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Broadband Over Power Lines

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Broadband Over Power Lines Linear device is transparent to the incident frequencies. Non-linear device senses the original frequencies, As well as the sum and differences of them. Humans are electrically non-linear devices.

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Broadband Over Power Lines

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