WP4000 - Study

[drowe67]

Deep dive into OFDM modem algorithms, use math and simulation to seek improvements over FreeDV 700D/E. After the initial iteration, seek out a suitable reviewer for review.

• [x] Outline key requirements
• [x] Model for voice link
• [x] Equalisation
• [x] Multipath
• [ ] Intersymbol interference
• [ ] Timing estimation
• [ ] PAPR reduction
• [ ] Acquistion
  • [x] Coarse timing
  • [x] Coarse freq
  • [x] UW post processing
  • [ ] state machine
  • [ ] Fine freq estimation and tracking
  • [ ] CPU load estimates
• [ ] Consideration of single carrier (removal of 300 baud limit)
• [ ] Automated tests to prevent bit rot of simulations

Refs

1. #17
2. freedv_low repo for the study

Deliverables

• [ ] Latex document
• [ ] Octave simulations
• [ ] README summarizing how to run simulations and build Latex doc