A New Selective Fading Model: Application to Propagation Data

Abstract

Channel transmission models for use in estimating the performance of radio systems on line-of-sight paths at 6 GHz are explored. The basis for this study is the simple three-ray multipath fade, which provides a channel transfer function of the form Η (ω) = a [l -b exp -j(u -ωο)

Internet Protocol microwave Radio Flat Fading Threshold and Dispersive Fade Margin measurements

“…A direct connection between the transmitter and receiver is used to simulate one atmospheric path. Another connection provides a connection between transmitter and receiver with a nominal echo delay (in microseconds) of about one divided by six times the radio channel bandwidth (in Megahertz) [6] [7]. For typical 30 to 60 MHz microwave radio channels, a long echo delay of 6.31 nanoseconds is adequate.…”

A Performance Comparison of Different FEC System Architectures for ATM over Wireless Multi-Carrier Modulation

“…This approach represents a simplified way to guarantee that P cc ≥ P cco . The throughput of the system is computed by (11) and the results are presented in Figure 4, with the results of section 4 repeated, for comparison purposes.…”

“…The parameters τ , a and b are the parameters of the channel model H(f i ). In our analysis, we follow [7] and use the Rummler´s channel model, expressed by [11] H…”

Comparison Between Some Outage Prediction Methods for Microwave Digital Radio

“…The transfer function of the multipath channel in this method follows the so-called two-path model: (1) where "a" is a constant amplitude scale factor while b, fo and r are slowly varying random parameters. In particular, b is the "echo amplitude",r the "echo delay" and fo is the "notch frequency".…”

“…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.…”