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Differential detection with IIR filter for improving DPSK detection performance

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1 Author(s)
Hamamoto, N. ; Commun. Res. Lab., Minist. of Posts & Telecommun., Tokyo, Japan

This paper presents a method for improving the performance of differential detection of differentially encoded phase shift keying (DPSK). The structure of the proposed detection scheme consists of a conventional differential detection circuit equipped with an infinite impulse response (IIR) filter combined with decision feedback. The results of theoretical analysis and computer simulation show that performance of the proposed detection method can approach that of coherent detection of DPSK under additive white Gaussian noise (AWGN) conditions without any increase in architectural complexity. Furthermore, a parameter of the proposed detector can be varied to optimize performance for static or fading conditions. An adaptive scheme suitable for time varying Rician-fading channel conditions is presented, and performance results obtained by computer simulation are given

Published in:

Communications, IEEE Transactions on  (Volume:44 ,  Issue: 8 )