TAILIEUCHUNG - Digital Communication I: Modulation and Coding Course-Lecture 6

Signal detection in AWGN channels Minimum distance detector. Maximum likelihood. Average probability of symbol error. Union bound on error probability. Upper bound on error probability based on the minimum in the detection process due to the filtering effects of the system Overall equivalent system transfer function | Digital communications I: Modulation and Coding Course Period 3 - 2007 Catharina Logothetis Lecture 6 Lecture 6 Last time we talked about: Signal detection in AWGN channels Minimum distance detector Maximum likelihood Average probability of symbol error Union bound on error probability Upper bound on error probability based on the minimum distance Lecture 6 Today we are going to talk about: Another source of error: Inter-symbol interference (ISI) Nyquist theorem The techniques to reduce ISI Pulse shaping Equalization Lecture 6 Inter-Symbol Interference (ISI) ISI in the detection process due to the filtering effects of the system Overall equivalent system transfer function creates echoes and hence time dispersion causes ISI at sampling time Lecture 6 Inter-symbol interference Baseband system model Equivalent model Tx filter Channel Rx. filter Detector Equivalent system Detector filtered noise Lecture 6 Nyquist bandwidth constraint Nyquist bandwidth constraint: The theoretical minimum .

• Điện - Điện tử
• digital communication
• multiuser communication
• multicarrier system
• adaptive equalization
• filter channel
• soure coding
• Communication systems
• Digital communication systems