The purpose of this study is to analyze the resonator filter, and to determine the effects of gain-bandwidth on the dominant complex conjugate pole pair. Optimization methods are then used as a design tool to determine the compensation required to shift the dominant pole pair back to their original design locations. New design values resulting from the compensation are used for the final circuit. Simulations are run to verify that the new design produces the desired magnitude response. The roots of the characteristic equation are checked to verify the proper location of the dominant pole pair. A comparison is made between the third order approximation and the fifth order one.

The theory of structural sub-band decomposition of an FIR filters is extended to adaptive filters. It is shown that this sub-band decomposition is equivalent to the transform of input data by orthogonal matrices, of which the Walsh-Hadamard Transform (WHT) is a special case. Thus, the proposed method is a generalization of the transform domain adaptive filtering (TDAF) using WHT, which is already known to enhance the convergence speed of adaptive filters. Furthermore, our method yields one possible hardware implementation of the fast WHT. The convergence behavior of the proposed sub-band adaptive filters is simulated using the Least Mean Squares (LMS) and Recursive Least Squares (RLS) algorithms. The results show the faster convergence speed of the proposed adaptive filters compared to conventional adaptive filters.

This MS thesis proposes the use of DYMOLA, an object-oriented language for modeling hierarchically structured systems, to generate ACSL simulation programs for continuous system analysis. An ACSL model described in terms of time dependent non-linear differential equations or transfer functions can be generated from a hierarchical model description of the system using DYMOLA. The model description in DYMOLA can be an equation description or a non-linear hierarchical bond graph abstraction to describe the system under investigation. The interface provides an automated method to generate ACSL simulation programs, hence eliminating the need for manual coding. The provision to specify an experiment description for run-time analysis and additional model statements is implemented. The implementation of the compiler's code generator includes parsing, error checking and system dependent file handling routines. Implementation techniques, model and control file specifications, and validation with examples in several application areas are described.

This paper describes the design and verification of a low cost SCSI-to-Ethernet bridge. Ethernet is a Local Area Network based on the IEEE 802.3-1985 standard for Carrier Sense Multiple Access with Collision Detection (CSMA/CD) access method. SCSI is a peripheral bus based on the ANSI X3.131-1986 standard. SCSI is capable of connecting eight peripheral devices on the bus at data rates up to 4 Mbytes/second. The design process includes the selection of appropriate VLSI devices and necessary support logic. The logic devices are connected for complete functionality of the bridge and schematics are generated to show proper connection. The design is verified using worst case timing analysis based on manufacturer specifications.

This thesis addresses the problem of measuring the group delay of a network with different frequencies at its input and output ports. Three distinct methods of measuring group delay are developed and their performance compared in a Monte Carlo analysis. Also considered is the problem of second order nonlinear distortion and its effect on measuring group delay. A method is developed to identify a specific second order nonlinear structure causing distortion. A nonlinear equalizer is then developed to cancel, or equalize, the undesired second order distortion.

Traditional solving techniques for the traveling salesman problem are carried out in two phases. First an initial tour is constructed, then this tour is improved using some form of optimization. The procedure introduced in this research applies a simple optimization technique which minimally increases the runtime of the initial tour construction procedure. At the same time it greatly improves the quality of the tour which is constructed. It does this by globally searching the tour after each insertion for points which require repositioning and performing point relocations where necessary.

Under the assumption of quasi-transverse electric and magnetic (quasi-TEM) mode of propagation, the transmission characteristics of a thin film microstrip line have been studied. Several numerical programs were employed to calculate the frequency dependent electrical parameters of the microstrip line, and to carry out the transient simulation in the thesis. Based on the simulation results, the relations of pulse distortion to the signal frequency content and the length of line have been investigated. Several transmission characteristics, such as attenuation and dispersion have been paid more attention, and their dependences on the frequency dependent electrical parameters have also been studied. Furthermore, a designing rule for the geometry of thin film microstrip lines is drawn, and a general conclusion is made concerning the effect of conductor losses on thin film microstrip line parameter and the things which should be considered in the design.

Video communication has advanced significantly over the last decade. Low bit rate video coding and low cost packet switching network access have made video communication practical and cost-effective. CCITT has recommended a compression standard (H.261) with a rate of px 64 Kb/s for p=1 to 30. The key elements of H.261 are: (1) interframe compensation, (2) motion compensation, (3) discrete cosine transform (DCT), (4) quantization, and (5) coding. For interframe compensation, only the difference of two consecutive frames is transmitted. In motion compensation, a spatial displacement vector is derived. DCT is used to convert spatial data into spatial frequency coefficients. All transformed coefficients are quantized with uniform quantizer for which step size is adjusted according to the buffer occupancy. Quantized coefficients are encoded using both fixed and variable length coding. At the decoder, the inverse operation of compression is performed. In this thesis, a detailed description of H.261 and its implementation in software are provided.

When continuous bit streams are transmitted over packet switching networks, the 'packetized' version of the real time traffic in a periodic sequence is distorted due to random transmission delay and packet loss. The need to recover the original continuous bit stream requires an estimation of the original source clock. This clock regeneration is called Circuit Emulation. Using a single phase lock loop is insufficient since the packet arrival jitter (PAJ) is generally very large. A circuit emulation technique that has been recently proposed provides algorithms to estimate the frequency difference between the original transmitter clock and a local retiming clock. A tracking loop similar to a PLL has been designed in this thesis to regenerate the original transmitter clock from the frequency difference estimated. Performance and simulation are studied for the PLL. It is found that by an appropriate choice of the tracking loop parameters, the transmitter clock can be regenerated with minimal jitter and delay.

No description available.