EEC215 – Circuits For Digital Communications
3 units – Fall Quarter
Lecture: 3 hours
Prerequisite: Prerequisite: EEC 150B and EEC 210 (may be taken concurrently); EEC 165, EEC 166 or EEC 265 recommended.
Grading: homework (50%), oral presentation (15%), and final exam (35%).
Analog, digital, and mixed-signal CMOS implementations of communication-circuit blocks: gain control, adaptive equalizers, sampling detectors, clock recovery.
Expanded Course Description:
Develop an understanding of the implementation options (analog vs. digital vs. mixed analog/digital) and trade-offs for the CMOS design of key signal-processing blocks for digital communication transceivers.
- Baseband digital data transmission, simple NRZ channel, bandwidth limitations, an ideal transmission channel.
- AGC loops (local feedback vs. decision-directed gain control), analog, digital, and mixed-signal approaches and trade-offs. The Least-Mean Square method for adjusting gain, ‘gear shifting.’
- Fixed equalizers, compromise equalization, adaptive equalizers (baud- and fractionally-spaced FIR equalizers), coefficient update equations, tap noise, training sequences, hardware implementations (analog, digital, and mixed-signal implementations of the equalizers and adaptive loops; direct and transposed FIR structures), DC cancellation tap. AGC and adaptive equalizer interaction.
- The Decision Feedback Equalizer (DFE), advantages and disadvantages, update equations, implementations, the RAM DFE.
- Partial response signaling, dicodes, the Viterbi detector, advantages, implementations.
- Clock recovery schemes, acquisition and tracking modes, decision directed approaches to timing recovery, effect of sampling jitter, analog, mixed-signal and digital approaches.
- A complete baseband receiver, showing all blocks. System examples: a 100 Mb/s ethernet transceiver, a disk-drive read channel, and a DSL transceiver.
- Echo cancellation, linearity requirements, implementations.
- Digital Baseband Transmission and Recording, J. Bergmans, Kluwer and selected journal papers
- Digital Communication, Lee and Messerschmitt, Kluwer
- Digital Communication, Proakis, Kluwer
- Discrete-Time Signal Processing, Oppenheim and Schafter, Prentice-Hall
- Analysis and Design of Analog Integrated Circuits, Gray and Meyer, Wiley
- Design of Analog Integrated Circuits and Systems, Laker and Sansen, McGraw-Hill
- Analog Integrated Circuit Design, Johns and Martin, Wiley
- Principles of Data Conversion System Design, Razavi, IEEE Press
- Theory and Practice of Modem Design, Bingham, Wiley
Instructors: Hurst, Spencer
This graduate course covers practical circuit-level implementations of functional blocks for baseband digital-communication receivers. It exposes the students to analog, digital and mixed-signal implementations, and the tradeoffs of each approach. Courses 112 and 211 cover some complementary analog-communication-circuit topics, such as mixers and classical phase-locked loops for AM and FM systems, without overlap.
Last revised: April 2000