Abstract Neural networks, simply stated, are machines that learn. A neural network consisting of several neurons, which are modeled after the human brain, uses synaptic weights, or interneuron connection strengths, to store acquired knowledge, which can be used in the future. One form of neural networks, feedforward networks, uses multilayer perceptrons, which are layered sets of neurons. This type of network contains an input layer, one or more hidden layers, and an output layer. Further, these...

Abstract Jitter is the deviation of a signal's transitions from ideal time positions. Excess jitter is undesireable in a communication system, as it can lead to increased bit error rate and degraded signal quality. This paper begins with an overview of the present state-of-the-art with respect to jitter analysis of data waveforms: The main characteristics of jitter are described, and corresonding measurement techniques are discussed. Waveform capture using both real-time and equivalent time...

Abstract This paper explores an algorithmic means for simulating self-similar data traffic, which can be used to model broadband networks. The aim of this work is to create a traffic generator tool that generates stochastic self-similar traffic using a fast simulation technique known as Random Midpoint Displacement Algorithm (RMDA). Finally, the output of the RMDA traffic generator is evaluated for accuracy by using the Varience of Residuals method to compare the Hurst estimates to the actual...

Abstract In the implementation of the wireless demodulator, numerous techniques exist to recover a carrier from the received signal. The selection of an appropriate recovery method depends on several conditions, among which are modulation type, acquisition time, tracking performance and the expected noise environment. This project first presents a discussion on the fundamental question of communications systems and includes sections on the transmitter, channel, and receiver. Receiver...

Abstract Bose-Chadhuri-Hocquenghem (BCH) codes belong to a powerful class of cyclic block codes that can be used to improve the performance of a communication link by detecting or correcting errors. BCH codes are considered to be the best of the binary block codes and are commonly used as a Forward Error Correction (FEC) technique in military and commercial communcation systems. Since the discovery of BCH codes, many mathematicians have developed decoding algorithms that can be implemented in...

Abstract Realistic simulation is an essential step in the development and testing of communications systems. Toward that end, it is essential to create an accurate model of the operating environment as well as the system components. This report details the derivation and creation of three such models developed for use with Simulink, the graphical user interface for Matlab (The Math Works, Inc.). The models simulated are (1) an Unshielded Twisted Pair (UTP) Cable Communications Channel, (2)...

Abstract Todays, [sic] expanded demand for digital signal processors (DSPs) require them to perform at higher and higher data rates. Many of the existing commercial available general purpose DSPs with their generic mulitply and add structure do not adequately meet this high data rate signal processing requirement. However, recent advances in higher density and faster field programmable gate arrays (FPGAs) have shown that, as configurable digital signal processing...