Space-time block codes for noncoherent CPFSK

In this paper the problem of unitary rate space-time block coding for multiple-input multiple-output communication systems employing continuous phase frequency shift keying is investigated. First, one-shot noncoherent detection is analysed in a maximum likelihood perspective; then, design criteria for optimal space-time codes are proposed and some error bounds for the devised coding schemes are derived. Numerical results evidence that the use of the proposed coding schemes can entail a limited energy loss with respect to other solutions available in the technical literature for coherent systems, with the relevant advantage, however, of a simple detection algorithm