Hierarchical modulation, also called layered modulation, is one of the signal processing techniques for multiplexing and modulating multiple data streams into one single symbol stream, where base-layer symbols and enhancement-layer symbols are synchronously overplayed before transmission.
Hierarkisk modulation eller lagdelt modulation er en af signalbehandlingsteknikkerne for at multiplekse og modulere multiple datastrømme ind i en enkelt symbolstrøm, hvor basis-lag symboler og enhancement-lag symboler bliver synkront overspillet før transmission.