The Performance Estimation of a Digital Mobile Radio System using Wideband Channel Parameters
Yeon Ho Chung · Journal of Electrical Engineering and Information Science · 1999
This paper presents a method of estimating the performance of a digital mobile radio system using wideband channel parameters. The wideband mobile radio channel is often characterized in terms of power delay profiles and Doppler spectra. The wideband channel parameters, such as delay spread, average delay, delay interval and delay window, can be extracted from measured or assumed power delay profiles. In this paper, the Global System for Mobile Communications (GSM) is considered and the GSM simulator is developed with full conformance to the GSM specifications. The power delay profiles randomly created were applied to the GSM simulator for different SNR values (8, 12, 16㏈). In order to find the most useful wideband channel parameter for the estimation of BER performance of the GSM system with different SNR values, the norm (root mean square error) has been utilized. The results show that the delay spread exhibits the smallest norm for the three considered SNR values and the narm decreases (i.e. provides a better estimation) as the SNR value increases. Based on the delay spread, a useful formula for the performance estimation for each SNR value has been derived.