ABSTRACT
In band-limited channels, such as deep space and satellite communications, continuous phase modulation (CPM) has explicit advantages, because it has a low spectral occupancy property. CPM is composed of the continuous phase encoder (CPE) and memoryless mapper (MM). CPE is a convolutional encoder producing code word sequences that are mapped onto waveforms by the MM, creating a continuous phase signal. CPE-related schemes have better performance than systems using the traditional approach for a given number of trellis states, because they increase Euclidean distance. Once the memory structure of CPM is assigned, it is possible to design a single-joint convolutional code, composed of trellis-and convolutionally-coded CPM systems as in [1-3].
