22-Elec-B3 Digital Communications Systems
Worked solutions to 7 past sittings (2014–2019), 35 questions. Pick a sitting, or start from a topic below.
Topics across the sittings
Topics that come up in more than one sitting, taken from the headings of our worked solutions. A topic counts once per sitting.
- Link Budgeting (7 sittings): December 2019 Q3 · May 2018 Q1 · December 2016 Q1 · May 2016 Q2 · December 2015 Q1 · December 2014 Q1 · Undated paper Q1
- D/A Conversion (6 sittings): December 2019 Q5 · May 2018 Q5 · December 2016 Q5 · May 2016 Q4 · December 2015 Q5 · Undated paper Q5
- Error-Control Coding (6 sittings): May 2018 Q3 · December 2016 Q3 · May 2016 Q3 · December 2015 Q3 · December 2014 Q5 · Undated paper Q3
- Sampling (6 sittings): December 2019 Q5 · May 2018 Q5 · December 2016 Q5 · May 2016 Q4 · December 2015 Q5 · Undated paper Q5
- Source Coding (6 sittings): May 2018 Q2 · December 2016 Q2 · May 2016 Q1 · December 2015 Q2 · December 2014 Q3 · Undated paper Q2
- Spread Spectrum Modulation (5 sittings): December 2019 Q4 · May 2018 Q4 · May 2016 Q5 · December 2015 Q4 · Undated paper Q4
- Convolutional Encoding (2 sittings): December 2019 Q1 · May 2018 Q3
- Entropy (2 sittings): May 2018 Q2 · December 2014 Q3
- Huffman Codes (2 sittings): May 2018 Q2 · December 2014 Q3
- Viterbi Decoding (2 sittings): December 2019 Q1 · May 2018 Q3
Questions by sitting
December 2019
- Question 1: Convolutional Encoding and Viterbi Decoding
- Question 2: Matched-Filter Detection of a Sinusoidal Pulse
- Question 3: Link Budgeting
- Question 4: Spread Spectrum Modulation
- Question 5: Sampling and D/A Conversion
May 2018
- Question 1: Link Budgeting
- Question 2: Source Coding — Huffman Codes and Entropy
- Question 3: Error-Control Coding — Convolutional Encoding and Viterbi Decoding
- Question 4: Spread Spectrum Modulation
- Question 5: Sampling and D/A Conversion
December 2016
- Question 1: Link Budgeting
- Question 2: Source Coding
- Question 3: Error-Control Coding
- Question 4: Signal Modulation and Detection
- Question 5: Sampling and D/A Conversion
May 2016
- Question 1: Source coding
- Question 2: Link budgeting
- Question 3: Error-control coding
- Question 4: Sampling and D/A conversion
- Question 5: Spread spectrum modulation
December 2015
- Question 1: Link budgeting
- Question 2: Source coding
- Question 3: Error-control coding
- Question 4: Spread spectrum modulation
- Question 5: Sampling and D/A conversion
December 2014
- Question 1: Link Budgeting
- Question 2: Modulation Schemes and Channel Capacity
- Question 3: Source Coding — Huffman Codes and Entropy
- Question 4: Signal Detection with a Matched Filter
- Question 5: Error-Control Coding
Undated paper
- Question 1: Link Budgeting
- Question 2: Source Coding
- Question 3: Error-Control Coding
- Question 4: Spread Spectrum Modulation
- Question 5: Sampling and D/A Conversion