Title :
Adaptive decision method for restricted band digital FM
Author :
Bolourchi, Nader ; Schilling, Donald L.
Author_Institution :
Dept. of Eng. Technol., New York Inst. of Technol., Old Westbury, NY, USA
Abstract :
A technique for the detection of narrowband multilevel continuous phase frequency shift keyed signals (CPFSK signals) is introduced. This technique is a noncoherent demodulation which utilizes a limiter-discriminator-integrator (LDI) followed by a nonlinear postprocessor to combat the intersymbol interference caused by a bandlimiting filter. The error rate performance is computed for this receiver and compared with that of the LDI receiver. The proposed system was simulated and the bit error rate (BER) performances of 2, 4, and 8-ary CPFSK schemes were obtained. The proposed technique provides improved BER performances for narrowband digital FM. Simulation results have verified the superiority of this method
Keywords :
adaptive filters; decision theory; demodulation; filtering and prediction theory; frequency shift keying; interference suppression; intersymbol interference; radio receivers; signal detection; CPFSK signals; FSK; LDI receiver; adaptive decision method; bandlimiting filter; bit error rate; error rate performance; intersymbol interference; limiter-discriminator-integrator; narrowband multilevel continuous phase frequency shift keyed signals; noncoherent demodulation; nonlinear postprocessor; radio receiver; restricted band digital FM; Adaptive signal detection; Bit error rate; Computational modeling; Demodulation; Filters; Frequency shift keying; Intersymbol interference; Narrowband; Phase detection; Phase frequency detector;
Conference_Titel :
Communications, 1992. ICC '92, Conference record, SUPERCOMM/ICC '92, Discovering a New World of Communications., IEEE International Conference on
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-0599-X
DOI :
10.1109/ICC.1992.268080
