Title :
A differential FM detector for low-IF radios
Author_Institution :
Lucent Technol., AT&T Bell Labs., Murray Hill, NJ, USA
Abstract :
This paper describes the implementation of a differential continuous phase FSK (CPFSK) detector suitable for low-IF receiver architectures. By using both in-phase and quadrature channels the double frequency term resulting after differential detection can be avoided. The digital detector assumes limited I/Q input signals which are 16 times oversampled. The proposed defector can be used for CPFSK, with a modulation index in the range 0.28-0.5. Simulation results are given for a worst case situation in which the modulation index is 0.28
Keywords :
continuous phase modulation; data communication; differential detection; frequency shift keying; radio receivers; CPFSK; differential FM detector; differential continuous phase FSK detector; differential detection; digital detector; double frequency term; in-phase channels; limited I/Q input signals; low-IF radios; low-IF receiver architectures; modulation index; oversampling; quadrature channels; simulation; Costs; Data systems; Delay effects; Detectors; Filters; Frequency modulation; Frequency shift keying; Interference; Lifting equipment; Phase detection;
Conference_Titel :
Vehicular Technology Conference, 1999. VTC 1999 - Fall. IEEE VTS 50th
Conference_Location :
Amsterdam
Print_ISBN :
0-7803-5435-4
DOI :
10.1109/VETECF.1999.798411
