PDF, 2.3 Mb, 档案已发布: Jun 1, 1997
The ultrasonic evaluation of specimens with large microstructures can be difficult because of interference caused by the grains in the material. The split spectrum processing (SSP) filtering technique effectively reduces this type of noise by employing a bank of filters followed by a nonlinear detector that increases signal-to-noise ratios. This application report describes the benefits of imp
PDF, 254 Kb, 档案已发布: Jan 1, 1995
An efficient method of detecting combustion engine knock is using spectral analysis. The detection process algorithm adapts to a no-knock reference at varying speeds and loads by using multiple frequencies. This document presents an problem overview current technology and two implementation examples are given to aid in the development of system specific hardware and software. The first system is
PDF, 268 Kb, 档案已发布: Jul 1, 1994
Due to its discrete nature DSPs represent variables and performs arithmetic functions with a finite word length. This produces three effects: the selection of filter transfer functions is quantized with filter poles and zeros existing only at specific locations in the z plane; the input is quantized; and noise is introduced from DSP multiplication and division operations. This document shows how
PDF, 168 Kb, 档案已发布: Nov 1, 1994
Four steps are required to set the TMS320 DSP interrupts: create a interrupt service routine initialize the vector table and set the memory map enable the interrupts in the CPU and enable the interrupt sources. This document shows how to set the interrupts in C C callable assembly or in-line C. Sample C code segments are provided. The appendix gives complete examples for setting interrupt vec
