Title :
Software ionospheric channel simulator
Author :
Girault, R. ; Thibault, J. ; Durand, B.
Abstract :
The ionospheric channel simulator described has been developed with the objective of evaluating HF modem performance either in fixed frequency or in frequency hopping mode. The simulator processes sampled data from complex signals generated by two kinds of sources: modem simulators; and hardware modems (an interface exists that performs the analog to digital conversion and generates the Q component of the complex signal). The following perturbations affecting HF transmissions have been taken into account: ionospheric propagation (Watterson Model); atmospheric noise; and interferences and jammers. In addition some effects of the transmitter-receiver (band-pass filtering, AGC) are included in the simulation. The software has been integrated on an array processor AP120B from FPS and a Vax 785 computer from DEC.<>
Keywords :
digital simulation; electronic equipment testing; ionospheric electromagnetic wave propagation; modems; radiowave propagation; AGC; DEC; FPS; HF modem performance; Vax 785 computer; Watterson Model; analog to digital conversion; array processor AP120B; atmospheric noise; band-pass filtering; complex signals; fixed frequency mode; frequency hopping mode; interferences; ionospheric channel simulator; ionospheric propagation; jammers; modem simulators; receiver; software; transmitter; Electronic equipment testing; Ionospheric electromagnetic propagation; Modems; Radio propagation; Simulation;
Conference_Titel :
HF Radio Systems and Techniques, 1988., Fourth International Conference on
Conference_Location :
London, UK
Print_ISBN :
0-85296-358-0
