Performance improvement methods for DECT and other non-coherent GMSK systems

Author

Djen, Wing Shing ; Dang, Nam ; Feher, Kamilo

Author_Institution

Dept. of Electr. & Comput. Eng., California Univ., Davis, CA, USA

fYear

1992

fDate

10-13 May 1992

Firstpage

97

Abstract

A simple and low cost configuration, fourth-order premodulation Gaussian LPF (GLPF) paired with fourth-order postdiscriminator Butterworth LPF (BLPF), is demonstrated to yield robust performance in GMSK systems. Frequency drift of voltage-controlled oscillator (VCO) and IC-type mismatch will cause DC-offset during noncoherent demodulation. A DC-offset compensation technique based on the decision detection concept is investigated. By using this method, 40% and 80% of DC-offset is compensated within 0.5 dB of BER performance degradation. The use of a pseudo error monitor for DC-offset compensation is also proposed

Keywords

compensation; cordless telephone systems; low-pass filters; minimum shift keying; radiofrequency filters; switched capacitor filters; DC-offset compensation; DECT; IC-type mismatch; decision detection; fourth-order postdiscriminator Butterworth LPF; fourth-order premodulation Gaussian LPF; low pass filters; noncoherent GMSK systems; noncoherent demodulation; pseudo error monitor; voltage-controlled oscillator; Band pass filters; Bit error rate; Circuit testing; Degradation; Demodulation; Digital communication; Frequency; Laboratories; Monitoring; Voltage-controlled oscillators;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 1992, IEEE 42nd

Conference_Location

Denver, CO

ISSN

1090-3038

Print_ISBN

0-7803-0673-2

Type

conf

DOI

10.1109/VETEC.1992.245387

Filename

245387