HF Channel Simulator for Wideband Signals. A Mathematical Model and Computer Program for 100-kHz Bandwidth HF Channels.
Abstract
A simulator has been developed that is capable of modeling the wideband HF channel. It is designed for carrier frequencies in the 2-32 MHz range and it can accommodate bandwidths up to 100 kHz and ground ranges up to 1000 km. It models the groundwave and ionosphere returns, but does not include additive noise or signal distortion produced in the transmitter or receiver. The inputs are the basic physical quantities that characterize the ionosphere (height, thickness, and maximum electron density of the E and F regions, sunspot number, time of day, etc) and those quantities that characterize the transmitter-receiver environment (carrier frequency, range, geographic location, antenna patterns, etc). Explicit values for channel parameters such as delay, attenuation, and doppler shift and spread are not required as these are calculated internally. The simulator is divided into two parts. The first part is concerned with the mathematical model of the ionosphere and the computation of the channel parameters from the basic inputs. These channel parameters are used in the second part to determine the response for arbitrary inputs. A software version of the simulator has been implemented and tested, and a Fortran listing of the program is appended. The program runs in non-real time and requires a computer with a Fortran IV compiler and at least 28 K of core. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 31, 1978
- Accession Number
- ADA054726
Entities
People
- H. C. Booker
- L. E. Hoff
- R. Lugannani