Title :
A closed form to predict outage of digital radio
Author_Institution :
ISPT, Fondazione Ugo Bordoni, Rome, Italy
fDate :
1/1/1992 12:00:00 AM
Abstract :
A simplified formula for predicting the outage probability of an unprotected high capacity line-of-sight digital radio link operating under frequency-selective fading conditions is presented. First, the propagation anomaly is modeled as a linear in-band amplitude dispersion in conjunction with a transmission minimum (notch) frequency located within or outside the signal band of interest. A simplified expression for the outage probability of the radio system under these conditions is then obtained. This expression is based on the fade occurrence factor in the climatic region of interest, the bandwidth of the transmitted signal, the carrier frequency of operation, the modulation scheme employed and the length of the link under consideration. The formula is applied to predict the outage probability of 4 phase shift keying (PSK), 8-PSK, and 16 quadrature amplitude modulation (QAM) high capacity radio links with specified parameters. The results obtained compare favorably with measured data
Keywords :
amplitude modulation; digital radio systems; fading; microwave links; phase shift keying; radiowave propagation; 16-QAM; 4-PSK; 8-PSK; bandwidth; carrier frequency; closed form solution; digital radio; fade occurrence factor; frequency-selective fading; high capacity radio links; line-of-sight digital radio link; linear in-band amplitude dispersion; modulation scheme; outage probability; phase shift keying; propagation anomaly; quadrature amplitude modulation; Bandwidth; Bit error rate; Capacity planning; Digital communication; Fading; Frequency estimation; Phase shift keying; Quadrature amplitude modulation; RF signals; Radio link;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
