Title :
Decision feedback postprocessor for zero-crossing digital FM demodulator
Author :
Lee, Kwang Bok ; Hou, Weiguang ; Kwon, Hyuck M.
Author_Institution :
Sch. of Electr. Eng., Seoul Nat. Univ., South Korea
fDate :
11/1/1999 12:00:00 AM
Abstract :
A baseband digital narrow-band FM receiver, called zero-intermediate frequency zero-crossing demodulator (ZIFZCD), has been developed. This demodulator may offer low complexity and simple implementation. However, the bit error rate (BER) performance of the ZIFZCD is inferior to that of the limiter-discriminator-integrate-and-dump (LDI) demodulator. In this paper, a simple decision feedback postprocessor (DFP) is proposed to improve the performance of the ZIFZCD. Analysis and simulation BER results of the ZIFZCD with the DFP are presented for minimum-shift keying (MSK) and Gaussian MSK (GMSK) signals under additive white Gaussian noise (AWGN) and mobile fading environments
Keywords :
AWGN channels; demodulators; digital radio; error statistics; fading channels; feedback; frequency modulation; integrating circuits; land mobile radio; limiters; minimum shift keying; radio receivers; signal processing; AWGN channels; BER performance; BER results; GMSK signals; Gaussian MSK signals; MSK; additive white Gaussian noise; baseband digital narrowband FM receiver; bit error rate; decision feedback postprocessor; digital wireless communication systems; limiter-discriminator-integrate-and-dump demodulator; low complexity demodulator; minimum-shift keying; mobile fading environment; simulation results; zero-crossing digital FM demodulator; AWGN; Additive white noise; Analytical models; Baseband; Bit error rate; Demodulation; Feedback; Frequency; Narrowband; Signal analysis;
Journal_Title :
Vehicular Technology, IEEE Transactions on
