Two-Dimensional Circular Signal Systems

In this article, a two-dimensional signal system with amplitude-phase modulation is considered, for which elementary signals are placed on concentric circles. The procedures for constructing such a system are presented and their simplified receiver is proposed. In this case, the circle to which the signal may belong is first determined, and then, the detection procedure is carried out on this circle. New signals are constructed, including those for simplified receivers and simulation results are presented for a scheme with one input and multiple outputs, in which fading is represented by the Nakagami-m process.