A TRANSMITTER, A RECEIVER, AND METHODS THEREIN

摘要

A method in a transmitter for transmitting CPM signals to a receiver. The transmitter divides bits into first and second sequences; duplicates the sequences into third and fourth sequences. The first and second sequences are mapped into a first layer, and the third fourth sequences are mapped into a second layer. The transmitter time reverses one of the first and second sequences, and one of the third and fourth sequences; and maps 1 to 0 and 0 to 1 in one of the time reversed sequence in each layer. The transmitter formats the first and second sequences into a first burst, and the third and fourth sequences into a second burst; and applies differential encoding to the bursts when a modulation index value is a non-integer. The first and second bursts are continuous phase modulated and transmitted as first and second CPM signals through a respective antenna.