An ultra-fast locking frequency synthesizer algorithm for zero blind slot communication in Digital European Cordless Telephone (DECT)

This paper presents the algorithm of a fast locking phase locked loop frequency synthesizer designed for the (1.9 GHz) Digital European Cordless Telephone (DECT) system. Off-line reload and open loop modulation techniques were adopted. The frequency synthesizer can lock at any DECT channel within the 48 microseconds guard time. It can provide the capability of zero blind slot operation for the DECT system. This paper gives an account of the design of a fast acquisition frequency synthesizer which yields a high spectral purity and a wide tuning range. With minor modifications, the proposed algorithm can be adopted to other digital cellular applications.