Title :
Improved decision boundaries of narrowband M-ary CPFSK
Author :
Fonseka, John P.
Author_Institution :
Sch. of Eng. & Comput. Sci., Texas Univ., Dallas, TX
fDate :
6/1/1994 12:00:00 AM
Abstract :
Improved decision boundaries of narrowband M-ary CPFSK with limiter discriminator integrator (LDI) detection, differentially coherent (DC) detection and coherent detection with differential decoding (CDDD) receivers are reported at modulation index 1/M. A simple method to determine each improved decision boundary by considering only the two closest symbols to that boundary is discussed. Numerical results presented for quaternary and octonary signals indicate that improved boundaries are almost identical to optimal boundaries and perform significantly better than the standard boundaries
Keywords :
decoding; demodulation; discriminators; frequency shift keying; limiters; receivers; coherent detection; decision boundaries; differential decoding; differentially coherent detection; limiter discriminator integrator detection; modulation index; narrowband M-ary CPFSK; octonary signals; quaternary signals; receivers; Decoding; Degradation; Equations; Filters; Helium; Intersymbol interference; Modulation; Narrowband; Performance analysis; Phase noise;
Journal_Title :
Communications, IEEE Transactions on
