METHODS AND NODES IN A WIRELESS COMMUNICATION SYSTEM ENABLING EQUAL ERROR PROTECTION WITH ADAPTIVE HIERARCHICAL MODULATION

摘要

Method (700) in a transmitter (110), a transmitter (110), a method (900) in a recipient (120) and a recipient (120) for multiplexing data streams (130-1, 130-2) by providing dynamic stream-to-label mapping. The method (700) comprises: transmitting (701 ) data on a plurality of data streams (130-1, 130-2); obtaining (702) a channel quality estimation; selecting (703) data streams (130-1, 130-2), based on the obtained (702) channel quality estimation; determining (704) a modulation scheme (400); forming (705) a binary label (420) and mapping bit positions in such label (420) with a selected (703) data stream (130-1, 130-2); determining (706) the binary label (420) by collecting bits (b1, b2, bn) from the data streams (130-1, 130-2); selecting (707) a constellation point (410) in the determined (704) modulation scheme (400), according to the binary label (420); and transmitting (708) data representing the selected (707) constellation point (410) in a time-frequency resource element.