Title :
Group-delay optimized IF filters for narrowband PCS
Author :
Ai, Liping ; Daigle, John N. ; Petrovic, Rade
Author_Institution :
Center for Wireless Commun., Mississippi Univ., MS, USA
fDate :
6/1/1997 12:00:00 AM
Abstract :
We consider the design of group-delay optimized IF filters for a specific narrowband personal communications system (NPCS) intended for two-way digital messaging. We assess the bit-error-rate (BER) performance achieved when such filters are implemented in the system, and we compare the results to those achieved with the filter originally recommended for implementation in the system. Two alternatives to the original sixth-order Bessel-Butterworth were examined: a fifth order Butterworth with cascaded first-order phase equalizer and a sixth-order equiripple group delay filter. The former showed up to 1 dB gain in BER performance for the forward channel, and the latter showed up to 1 dB gain in the reverse channel
Keywords :
Butterworth filters; cascade networks; delays; digital filters; digital radio; error statistics; mobile radio; personal communication networks; 1 dB; 4 dB; BER performance; bit-error-rate performance; fifth order Butterworth filter; first-order phase equalizer; group-delay optimized IF filters; narrowband PCS; personal communications system; sixth-order equiripple group delay filter; two-way digital messaging; Bit error rate; Chebyshev approximation; Delay; Digital filters; Frequency shift keying; Narrowband; Passband; Personal communication networks; RF signals; Wireless communication;
Journal_Title :
Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on
