4 ms·
Why not QPSK over VSB like used in broadcast satellites?
by anticensor 4y ago
Why not QPSK over VSB like used in broadcast satellites?
- Johnythree 4y agoThe problem with QPSK in particular is a loss of phase lock in marginal conditions, or with interference. It would require higher complexity, with no improvement for marginal signals. One possible improvement would be "Synchronous AM" (eg 1/2 of a QAM signal) but that will also lose phase lock in weak signal conditions, eg when it is most needed.