A noncoherent receiver for interleaved trellis-coded CPFSK signals transmitted over frequency-flat fading channels

We propose a novel two-stage noncoherent receiver for interleaved trellis-c oded CPFSK signals transmitted over time-selective channels, The first stag e of the receiver computes reliability information about the transmitted sy mbols and delivers it to the second stage which operates as a trellis decod er. Simulation results show that the proposed detection strategy outperform s previous noncoherent receivers,vith a moderate increase in complexity.