Semi-coherent GFSK receiver for DECT standard

We have investigated a semi-coherent detection technique for wireless communication applications. The performance of PLL GFSK demodulator in additive white Gaussian noise (AWGN), interference limited environment, and fading dispersive channels without diversity implementation is simulated. The results indicate that a well-designed PLL demodulator based on the selection of PLL parameters and post detection filtering is an appropriate candidate for DECT receiver in multipath and AWGN channels. We have implemented prototype design of ADPLL demodulator in MAX9400 CPLD and its ASIC implementation has been simulated in a 0.6 micron CMOS process. An All-Digital PLL (ADPLL) demodulator has been used. The frequency of its data-processing clock for 10MHz IF signal is 800MHz at worst speed conditions.