Week 11
Carrier and Timing Synchronization
I use the saved course file to reconnect sampling, baseband transmission, digital modulation, and error-rate analysis.
What I connect in this unit
Carrier offset rotates the constellation over time, phase offset creates a fixed rotation, and symbol-timing error narrows the eye opening. A known preamble provides a reference for estimating all three before data decisions.
Concept map
- Carrier offset
- Phase offset
- Symbol timing
- Preambles
Technical anchor
With frequency offset Δf, phase error at symbol n is φ[n] = φ0 + 2πΔf·nT, causing steady constellation rotation.
How I review it
Use the preamble correlation peak for frame start, estimate Δf from phase change across known symbols, and then check residual phase and timing sample position separately.
Connection to the full course
Unit 11 of 12. Unit numbers expand topics from the saved file into a concept sequence, not an attendance-week record.