Signal Processing for Intelligent Sensor Systems with MATLAB, 2nd Edition

3    Digital Filtering

Digital filtering is a fundamental technique that allows digital computers to process sensor signals from the environment and generate output signals of almost any desired waveform. The digital computer in the 1990s has either replaced, or begun to replace, the analog electronics commonly found throughout the later part of the twentieth century. The twenty-first century begins with widespread digital filtering and compression of both audio and video information streamed across the Internet. The ¼″ phone plug and the “rca jack” are being replaced by the USB port, Firewire (IEEE 1394), and Ethernet RJ45 jacks for digital connectivity of devices and systems. For electronic control systems, the advent of the digital computer ...