Outage prediction of digital radio systems

Comparison Between Some Outage Prediction Methods for Microwave Digital Radio

“…Scaling rules are used to pass from a signature measured at some "reference" delay To to another at a "desired" delay r . In the TELETTRA method the scaling rule is (see also [5]) X (fo, T) =-X (fo,TQ\ (15) where "x" stands for either "mp" or "nmp". The necessary steps to determine the outage probability are as illustrated in [5].…”

“…In the TELETTRA method the scaling rule is (see also [5]) X (fo, T) =-X (fo,TQ\ (15) where "x" stands for either "mp" or "nmp". The necessary steps to determine the outage probability are as illustrated in [5]. Basically the fraction of time during which the channel parameters are inside the signature must be computed.…”

“…Campbell and Coutts formula for Pout (DF) coincides with (17) when the factor 4.3 is replaced by 2. This is a consequence of the fact that in [5]- [6] Pb(b) is constant whereas in (2) it is exponential. As already mentioned, however, no predictions are made in [5]- [6] for the values ofr m andq as a function of the link parameters.…”

“…As these links have unlike propagation characteristics, it is believed that the comparison should provide a good test for assessing the reliability of each method. Such methods are: 1) that based on Rummler multipath model [1]- [2] 2) that proposed by Campbell and Coutts [5]- [6] 3) that used by TELETTRA [3]- [4] In the following we will not dwell on the details of 1) and 2) because they are well documented elsewhere. Rather, we will review 3) and, en route, we will stress differences and similarities with the other two.…”

Analysis/Simulation Study of Cross-Polarization Cancellation in Dual-Polarization Digital Radio

“…Rummler" has published a widely used joint probability density function (pdf) for the a-, b-, and cP-parameters of a co-pol function such as (5). We will use that pdf to characterize the statistics of both Hu(f) and H 22(f).…”