9 min read
EVM: why a clean spectrum can still fail at 64-QAM
A pattern I keep seeing on the bench goes like this. A prototype modem shows a clean spectrum, the signal sits well above the thermal noise floor, and the link budget says there is …
2 pages
Constellation
6 min read
SNR: the number that decides whether a signal survives
Every communication system starts with the same goal: move a signal from one place to another and recover its meaning at the far end. In practice the signal passes through copper, …