Performance improvement of DPSK system using a reconfigurable multiple bit differential detection algorithm in the presence of frequency offset

In this paper we propose a reconfigurable multiple bit differential detection algorithm that can be used for the DPSK signal reception in the presence of significant frequency offsets. The analysis shows that the bit error probability of the proposed algorithm is nearly constant in a wide frequency offsets range and equal to the error probability for zero frequency offset. Also, the proposed receiver has better performance than the ordinary differential detection receiver for any frequency offset.