ECE 445S Real-Time Digital Signal Processing Laboratory - Lecture 16

Announcements: Cellular Basestation Design

Lecture

• Lecture slides on Quadrature Amplitude Modulation (QAM) Receivers in PowerPoint format.
  
  • Board: Channel Equalizer
  • Board: Replacing multiplication by two with signed right shift for automatic gain control

• Fall 2020 lecture notes part 1 and part 2 by Mr. Jacobellis and Prof. Evans

• Lecture on QAM in spring 2014 on Video: Part 1 - Part 2 - Part 3

Supplemental Information

• Fall 2023 marker board notes
  • decision directed objective function
  • channel equalization
  • carrier detection
• Fall 2022 marker board notes
  • Channel capacity
  • Adaptive LMS filter
• Spring 2022 marker board notes
  • Part 1: baseband equivalent channels and adaptive FIR equalizers
  • Part 2: automatic gain control and channel equalization review
• Fall 2021 marker board notes
  • Part 1: QAM receiver design, IIR equalizer and adaptive FIR equalizer
  • Part 2: carrier detection, symbol error rate plot, transmit power and system design tradeoffs
• Spring 2021 marker board notes
  • Part 1 takeaways: QAM Transmitter architectures part 1 and part 2
  • Part 1 what's beyond QAM, ideal channel and adaptive LMS equalizer
  • Part 2 outline, carrier detection, symbol timing recovery and gray coding and fast QAM decoding
  • Part 2 upconverted PAM from Fall 2018 Midterm 2.1(b)
• Spring 2020 marker board notes
  • Fast algorithm for QAM decoding
  • Slide 16-6: Ideal channel impulse and frequency response
  • Slide 16-8: Adaptive least-mean squares (LMS) FIR filter, by adapting one coefficient and all coefficients
  • Slide 16-9: carrier detection
  • Slide 16-10: symbol timing/clock recovery
• Fall 2019 marker board notes
  • Cellular LTE SNR feedback
  • Matched filter
  • Equalizer design
    • Ideal Channel
    • Infinite Impulse Response (IIR) Equalizer
    • Adaptive Least Mean Squares (LMS) Finite Impulse Response (FIR) filter: one coefficient and multiple coefficients
  • Symbol recovery
    • Symbol and sampling clocks
    • Upconverted PAM transmission
    • Symbol recovery using complex bandpass filters
• "An Introduction to Radio Architectures and Signal Processing", Mikko Valkama & Markku Renfors, Oct. 2011.
• "Digital (Feedforward) Automatic Gain Control", Gerald Cain, DSP Creations, Dec. 8, 2016.

Last updated 04/28/24. Send comments to bevans@ece.utexas.edu