- Lecture 1 slides on
*Sinusoidal Generation*in PowerPoint format.- Homework #0 problems
- 1-3 modulation, demodulation, and sampling in continuous time
- 4 sinusoidal generation in discrete time

- Spring 2024 Lecture Part 1
**Board**. Review for Lecture 0**Board**. Bandwidth

- Spring 2024 Lecture Part 2
**Board**. Review of Bandwidth**Demo**. Matlab code for sinusoidal amplitude modulation of sinusoidal and gong signals, and gong audio file**Board**. Quadrature Amplitude Modulation Tx and Rx

- Spring 2024 Lecture Part 3
**Demo**. Effect of noise and interference on Wi-Fi in the unlicensed 2.4 GHz band, and demonstration of bandwidths. Keysight Technologies, 2020. Bluetooth transmissions uses 1 or 2 MHz of bandwidth, and Wi-Fi transmissions use 20 MHz of bandwidth.**Board**. Channel Capacity**Board**. Sampling Theorem**Board**. Impulse Train Fourier Series Expansion**Board**. Periodicity in Frequency Domain due to Sampling**Handout**. Sampling

- Spring 2024 Lecture Part 4
**Handout**. Discrete-time Periodicity**Board**. Periodicity for a continuous-time cosine signal**Song**. "AM Radio", by Everclear, 2000.**Tremolo**. The Smiths, "How Soon is Now?", opening guitar riff has a tremolo effect by guitarist Johnny Marr, with a second voice playing slide guitar. Tremolo is rapid change in volume to give a sensation of motion, and is rapidly varying modulation effect. "Songs that Changed Music: The Smiths - How Soon Is Now".

**Handout**. Designing averaging filters- Worldwide spectrum allocations by Rohde & Schwarz.

- Homework #0 problems
- Spring 2014 lecture on video: Part 1 and Part 2.

- Fall 2023 notes
- Fall 2023 Lecture Part 1
**Board**. Sinusoids and Thermal Noise

- Fall 2023 Lecture Part 2
**Board**. Review of thermal noise**Demo**. Effect of noise and interference on Wi-Fi and demonstration of bandwidths, Keysight Technologies, 2020 (Bluetooth transmissions uses 1 MHz bandwidth and Wi-Fi transmissions use 20 MHz bandwidth)**Board**. Amplitude modulation

- Fall 2023 Lecture Part 3
**Song**. "AM Radio", by Everclear, 2000.**Tremolo**. The Smiths, "How Soon is Now?", opening guitar riff has a tremolo effect by guitarist Johnny Marr, with a second voice playing slide guitar. Tremolo is rapid change in volume to give a sensation of motion, and is rapidly varying modulation effect. "Songs that Changed Music: The Smiths - How Soon Is Now".**Board**. Tremolo, mixer and sampling**Demo**. Matlab code for sinusoidal amplitude modulation of sinusoidal and gong signals, and gong audio file**Handouts**. Sampling and Discrete-time Periodicity

- Fall 2023 Lecture Part 1
- Spring 2023 notes
- Course theme and frequency units
- Cellular communications: bandwidths in 4G and 5G and degrees of freedom in design
- Bandwidth review and the Dirac delta
**Lecture Notes**by TA Alice Liu- Sampling a cosine signal
- Initial conditions for difference equation method
**Lecture Notes**by TA Dan Jacobellis

- Fall 2022 marker board notes
- Spring 2022 marker board notes:
- Bandwidth: thermal noise and finite observation time and baseband signals
- Takeaways: design flow and bandwidth
- Filter design: averaging filter and performance evaluation
- Sampling: cosine signal and cosine lookup table
- Communication systems: modulation, analog/RF front end courses, and degrees of freedom

- Spring 2021 marker board notes:
- Part 1: takeaways from lecture #0 and thermal noise
- Part 2: impulse trains (homework 0.3) and takeaways and modulation
- Part 3: communication resources, averaging filter and sampling
- Part 4: takeaways, averaging filter frequency response and C and Matlab code to generate cosine.

- Fall 2020 marker board notes:
- Finite observation and sinusoidal modulation
- Sinusoidal demodulation and sampling a cosine
- Linear time-invariant oscillators: discrete-time implementation (slide 1-19) and bounded-input bounded-output (BIBO) instabilty
- Mixer circuit (slide 1-26)

- Professor Mike Merrifield, University of Nottingham, "What is the maximum Bandwidth?", Oct. 3, 2013.
- Sinusoidal demonstrations from
*DSP First*and SUNY Stony Brook - Notes on sinusoids from spring 2006.

Last updated 01/31/24. Send comments to bevans@ece.utexas.edu