part_2_channels - CIS 6930 Powerline Communications Richard...

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Unformatted text preview: CIS 6930 Powerline Communications Richard Newman Spring 2010 Channels - Outline Bands Frequency-dependencies/impulse response Noise Transmission limitations Bands Low frequency: 0-1KHz Utility use for control Residential and commercial control, radio Broadband IH and AC Medium frequency: 1 Khz- 1 MHz High frequency: 1 MHz 100 MHz Ultra-high frequency: > 100 MHz Frequency Dependent Fading Multiple reflection points in medium Wire gauge changes Sharp turns in wiring Junction box connections Causes frequency dependent fading Longer impulse response => ISI Load changes affect channel Every path is unique (even in each direction) Frequency Dependent Fading 05 .0 V o ls t 0 05 .0 0 .1 0 0 .5 1 1 .5 2 2 .5 Tu ieS m () 3 3 .5 4 4 .5 5 5 . 6 2 0 4 0 Ain) tea(B no ud t Frequency Dependent Fading 5 1 0 4 V o ls t 0 5 1 0 4 0 0 . 5 1 1 . 5 2 2 . 5 Tu ieS m () 3 3 .5 4 4 . 5 5 5 . 5 6 4 0 6 0 AtoB tea() nn ud i 8 0 1 0 0 5 1 0 1 5 2 0 Fe(H ruyz enM qc ) 2 5 3 0 3 5 4 0 4 5 5 0 Frequency Dependent Fading 2 1 0 4 V o ls t 0 2 1 0 4 0 0 . 5 1 1 . 5 2 2 . 5 Tu ieS m () 3 3 . 5 4 4 . 5 5 5 . 5 6 4 0 6 0 AtoB tea() nn ud i 8 0 1 0 0 5 1 0 1 5 2 0 Fe(H ruyz enM qc ) 2 5 3 0 3 5 4 0 4 5 5 0 Noise Sources Brush motors Hair dryer, drill, mixer, blender, etc. Usually intermittent Switching power supply, halogen lamp, etc. Severe noise power Light dimmer switch, power system "glitches" Periodic impulses Random impulse noise Cyclostationary noise Radio interference Amateur radio transmitters Hair Dryer Noise on Power Line Drill Noise on Power Line 0 .2 0 0 .1 0 V o ls t 0 0 .1 0 0 .2 0 0 5 0 1 0 1 5 0 2 0 Tu ieS m () 2 5 0 3 0 3 5 0 4 0 4 5 0 5 0 2 0 4 0 6 0 L(B ed v) e l 8 0 1 0 0 5 1 0 1 5 2 0 FeyH ru(z enM qc ) 2 5 3 0 3 5 4 0 4 5 5 0 Periodic Impulse Noise 0 .4 0 0 .2 0 0 V o ls t 0 .2 0 0 .4 0 0 .6 0 0 5 0 1 0 1 5 0 2 0 Tu ie) m (S 2 5 0 3 0 3 5 0 4 0 4 5 0 5 0 4 0 6 0 Ld e(B v) e l 8 0 1 0 Random Impulse Noise 1 0 . 5 V o ls t 0 . 5 0 1 0 5 0 1 0 1 5 0 2 0 TS ie) m ( u 2 5 0 3 0 3 5 0 4 0 4 5 0 5 0 2 0 4 0 6 0 Ld e(B v) e l 8 0 1 0 0 5 1 0 1 5 2 0 2 5 3 0 3 5 4 0 4 5 5 0 Random Impulse Noise 2 1 V o ls t 0 1 2 0 5 0 1 0 1 5 0 2 0 Tu ie) m ( S 2 5 0 3 0 3 5 0 4 0 4 5 0 5 0 2 0 4 0 6 0 Ld e(B v) e l 8 0 1 0 0 5 1 0 1 5 2 0 2 5 3 0 3 5 4 0 4 5 5 0 Transmission Limitations Transmit Spectrum Mask (USA FCC part 15) 40 40 45 50 5 60 65 MSK y 70 A 75 80 85 90 95 10 10 0 2 4 6 8 10 12 14 16 18 20 2 24 26 28 0 y .mhz POERDM WB/H Z 30 30 ...
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This note was uploaded on 01/18/2012 for the course CIS 6930 taught by Professor Staff during the Spring '08 term at University of Florida.

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