lecture6_ee689_channel_pulse_model

lecture6_ee689_channel_pulse_model - ECEN689: Special...

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Sam Palermo ECEN689: Special Topics in High-Speed Links Circuits and Systems Spring 2011 Lecture 6: Channel Pulse Model
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Agenda ISI Channel pulse model Peak distortion analysis Reference material for this lecture Peak distortion analysis paper by Casper (posted on web) Notes from H. Song, Arizona State 2
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Inter-Symbol Interference (ISI) Previous bits residual state can distort the current bit, resulting in inter-symbol interference (ISI) ISI is caused by Reflections, Channel resonances, Channel loss (dispersion) Pulse Response 3 ( ) ( ) t c 1 ( ) t h ( ) ( ) t c 1 ( ) ( ) t y 1 ( ) ( ) ( ) ( ) ( ) t h t c t y = 1 1
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NRZ Data Modeling An NRZ data stream can be modeled as a superposition of isolated “1”s and “0”s 4 Data = “1000101” “1” Symbol “0” Symbol ( ) ( ) ( ) ( ) ( ) T k t u kT t u t c k 1 1 + ( ) ( ) ( ) ( ) t c t c k k 1 0 = ( ) < 0 0 0 1 where t t t u [ Song ]
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NRZ Data Modeling An NRZ data stream can be modeled as a superposition of isolated “1”s and “0”s 5 ( ) ( ) ( ) −∞ = = k d k i t c t V k [ Song ]
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This note was uploaded on 01/01/2012 for the course ECEN 689 taught by Professor Enjeti during the Spring '07 term at Texas A&M.

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lecture6_ee689_channel_pulse_model - ECEN689: Special...

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