1. © 2004, B ROADBAND Physics, Inc. All Rights Reserved. Innovation Through Mathematics Call for Interest on Broadband Over Power Lines 7 June 2004, Denver CO, USA Mark Laubach, CEO, N3BMN Broadband Physics, Inc. San Jose, CA

2. © 2004, All Rights Reserved Innovation Through Mathematics 2 Power Lines are a Harsh Mistress for high speed communications RF Environment –Power lines are bad antenna –History of being a bad neighbor to other services Harsh ingress noise environment –Tough on modulation for high bit rate with low errors –Constantly changing impairments

3. © 2004, All Rights Reserved Innovation Through Mathematics 3 Looking Forward The Physical Layer must be of sound foundation –reliable high capacity digital service –a good neighbor, today and in the future. Nothing else matters Everything else is enabled

4. © 2004, All Rights Reserved Innovation Through Mathematics 4 Broadband Physics Sub-band Division Multiplexing (SDM) –Wavelet mathematics applied to digital signaling –Carrier-less –Quadrature matched filter approach Filtering / de-filtering of well shaped impulses –+55dB designed stop-band per Sub-Band –High phase-noise and phase ripple resiliency –Highly flexible –No cyclic-prefix or Time Domain Equalizer –and more….

5. © 2004, All Rights Reserved Innovation Through Mathematics 5 SDM Overview Wavelet math inherently defines a multi-sub-band system –+55dB stop bands –Orthogonal in frequency and time

6. © 2004, All Rights Reserved Innovation Through Mathematics 6 SDM Baseband Full 18MHz –Maintains steep stop-bands –Flat topped –Well behaved

7. © 2004, All Rights Reserved Innovation Through Mathematics 7 SDM Flexibility and Integrity Unique sub-bands can be controlled via software –On / off –Depth of modulation 2bits/second/Hz through 12bits/second/Hz –Key to Good Neighbor to other services –Key to future proofing (flexibility) Frequency domain impairments isolated to specific sub-bands –Well isolated due to stop-band performance –Key to phase and impairment resiliency

8. © 2004, All Rights Reserved Innovation Through Mathematics 8 Ham Radio Band Plans (MHz)

9. © 2004, All Rights Reserved Innovation Through Mathematics 9 SDM Good Neighbor

10. © 2004, All Rights Reserved Innovation Through Mathematics 10 SDM Resiliency SDM isolates frequency noise impairments to specific sub-bands 0DB -10DB -20DB -30DB -40DB -50DB -60DB Power Frequency Single Sub-Band Equalization Domain SDM SDM can be designed to be very resilient to phase noise ripple, group delay, micro-reflections, multi-path, etc.

11. © 2004, All Rights Reserved Innovation Through Mathematics 11 Very Low Spectral Regrowth 2 sub-bands off creates +50dB notch Approx 3dB regrowth for 18Mhz wide modulation Additive White Gaussian Noise (AWGN) only in notches, 50dB down!

12. © 2004, All Rights Reserved Innovation Through Mathematics 12 Summary BoPL needs a sturdy foundation –SDM is a brick wall modulation with no bandaids –Highly flexible –Highly resilient to BoPL noise conditions BPIs belief: if BoPL can conquer power lines and be friendly to adjacent services, can only be done via SDM BPIs position: –Fully patented 7 U.S., 1 Canadian –If IEEE process were to select SDM technology, BPI would be willing to license on a customary non-discriminatory basis for a reasonable fee –BPI technology ready to vet this summer Needs interested parties/company