Channel Simulation Processor for the Multi-Node Tactical Network Simulator.

摘要

The design and development of a digital signal processor (DSP) based groundwave and ionospheric communication channel simulator is described. The primary objective is to simulate communication channel perturbations for a network of communication via an array of DSP modules operating in real-time. This array of channel simulator processors is a subsystem of the multimode tactical network simulator (TACNETSIM) being developed by the Information Technology Division at the Naval Research Laboratory(NRL). The propagation model developed is based upon intra-battlegroup high frequency (HF) communications. The communication channel model consists of two modes of propagation: HF groundwave and HF skywave. The HF skywave component is simulated via a Watterson ionospheric model. The real-time DSP implementation of the Watterson ionospheric model is described in terms of subprocesses. The performance of each subprocess is shown to be within established statistical parameters. Detailed specifications are given of both the hardware and software design. The simulator is designed for dynamic channel modeling and includes a data interface for real-time program control.... Watterson model, Digital signal processing, Propagation modelling.