Noncoherent block demodulation of PSK

Noncoherent demodulation of phase shift keying (PSK) over a multisymbol observation interval is considered. It is shown that by performing noncoherent demodulation over an increased observation interval, the performance approaches that of coherent PSK. This block demodulation technique of PSK is a natural generalization of differentially coherent detection, and yields improved signal-to-noise ratio (SNR) performance. Some structural properties of this demodulation technique are explored, and its performance is analyzed by using the union-bound