In this research, an AHPL (A Hardware Programming Language) based automation system is used to design and verify the Intel-8080 microprocessor from the RTL (Register Transfer Level) hardware description through the network list of transistors. The HPSIM is used as a RTL simulator which interprets the AHPL description and executes the connections, branches, and register transfer, and prints line or register values for each circuit clock period. After the AHPL description has been translated to switch-level link list, ESIM is applied for more detailed simulation to ensure the digital behavior in this microprocessor design is correct. The ESIM is an event-driven switch-level simulator which accepts commands from the user, and executes each command before reading the next one. After performing these different levels of simulations, a comparison is discussed at the end.

The purpose of this experiment was to implement an alternative mapping realization of the hierarchical abstract simulator on the Intel Multibus 1 microprocessor system. Utilizing three 286/10 single board computers, integration of the M286 monitor with the hierarchical abstract simulator algorithm and execution of the distributed simulator system (DSS) was studied. Seven experiments were done on the DSS showing that the DSS correctly executes the algorithm of the hierarchical abstract simulator. An additional benefit is that parallelism is achieved even without external input: one simulator executes the internal transition function, with other executing the external transition function. This system has demonstrated that the hierarchical abstract simulator concept can be implemented on present-day, available hardware.

As a CAD tool, the Computer Aided Model Structuring System (call MOSTS in the following text) for model structuring in system design and system simulation has been designed and implemented. First, this MOSTS allows system design experts to create and save System Data Bases (SDBs) for model structuring in system design and simulation. Then, these SDBs can be retrieved, modified, and finally used to structure system models by design engineers. The MOSTS pursues the model structuring process in such a way that the model structure having the best performance (according to the expert's knowledge and the design engineer's design criteria) will be generated first, and then the second best model, the third best model, and so on.

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Approved for public release; distribution is unlimited / Current Army models and simulations provide limited representation of the actions and behaviors of the individual combatant (Soldier, Sailor, Marine, or Airman). As the Army transforms into the Future Force, more emphasis is being placed on modeling the actions and behaviors of the individual combatant. The Training and Doctrine Command Analysis Center - Monterey has initiated the Individual Combatant Research Project. One research area is modeling how individual entities react to indirect fire, which is the focus of this thesis. From a study of both historical examples and current U.S. Army doctrine, we derived the input factors and responses. We selected the most significant input factors and derived a general model to represent this phenomenon. From the general model we derived a specific model that we implemented as a behavior rule using the Combined Arms Analysis Tool for the 21st Century, CXXI. In order to determine the effectiveness of the model, we used the face validation method. Our data analysis consisted of a twosample t-test, a Mann-Whitney test, and a two-way analysis of variance. From our analysis we concluded that implementation of our model in CXXI was an improvement that made CXXI more realistic and functional. / Captain, United States Army

Approved for public release, distribution unlimited / The purpose of this thesis is to conduct the research necessary to develop integrated 3D terrain maps capable of supporting an Unmanned Aerial Vehicle Flight Mission Control Support System. In this work, the author has tried to explore the feasibility of exploiting digital topographic maps and further understanding of the digital terrain support available to UAV FMCSS developers. This thesis explores numerous digital terrain data representations and tools available to create digital environments. This work examines and gives a methodology how to find, process, and operate in these environments. To accomplish this, the author explores the more general problem of where to find the data, what tools are available, and how to put the pieces together to create a registered digital environment on a state-of-the-art computer. This work provides a logical construct and design methodology for an analyst to create high fidelity terrain data sets. It functions as a â how toâ manual to help analysts understand which information and tools are available to use for different types of simulation projects.

A mobile ad-hoc network (MANET) is an autonomous system of mobile nodes connected by wireless links. The performance of MANET is related to the efficiency of the routing protocols in adapting to frequently changing network topology and link status. This thesis addresses the issue by comparing the relative performance of three key ad-hoc routing protocols: Destination-sequenced Distance Vector (DSDV), Ad-hoc On-demand Distance Vector (AODV) and Optimized Link State Routing (OLSR). The protocols are tested based on two scenarios, namely, tactical networks for ships and sensor-based network nodes. The objective is to validate the scalability and effectiveness of the protocols. Four performance metrics were measured by varying the maximum speed of mobile hosts, network size and traffic load, to assess the routing capability and protocol efficiency. The simulation results indicate that AODV performs better than OSLR and DSDV in the first scenario. Although OLSR also performed relatively well, the associated high routing overhead is the dominant reason for not choosing it. On the other hand, OLSR emerged as the protocol of choice for sensor networks, where the high routing overhead is counteracted by consistently better performance in all other metrics. Due to the slow evolution of the sensor network topology, OLSR performed satisfactorily for best effort traffic but needed subtle adjustments to balance between latency and bandwidth to meet the requirements of delay-sensitive applications. Lastly, default parameters of OLSR were tweaked and recommendations were made with results that showed promising ways to further improve the performance of OLSR in sensor networks, albeit not as significantly as in the tactical networks for the ship case.

Dissertation submitted in partial compliance with the requirements for Masters Degree in Technology: Electrical Engineering (Light Current), Technikon Natal, 2001. / M