CT Scan Basic Principle: CT Scan Basic Principle – Biomedicine is one area in which the use of digital signal processing techniques had had great impact. Computer tomography A recent advance in diagnostic analysis is represented by computer tomography (CT) scanning. While in standard radiography (X-rays) a 3-dimensional object (part of the body) is represented […]
Category: FILTERS
Modern Radar Systems Analysis
Modern Radar Systems Analysis: Modern Radar Systems Analysis are of great importance for both military and civil applications. The main problem of a typical radar system is the detection of return pulses; this substantially corresponds to determining the presence or absence of a pulse in noise. For such radar systems, the band width is usually […]
Bandpass Analysis
Bandpass Analysis: There exist many practical situations in which multiple filtering and band pass analysis are required. In multiple filtering, one specific operation (for example low pass, high pass, band pass, etc.) is required to be performed on many signal channels presented as input data, e.g. in multiplex systems. In band pass analysis, many Bandpass […]
Typical Digital Filtering Operations
Typical Digital Filtering Operations: Digital filters in fact can be applied in many different parts of a signal and image processing transmission system. Two typical examples of systems in which Typical Digital Filtering Operations can be inserted are Local digital processing systems (Fig. 15.42), and Digital communication system (Fig. 15.43) In the first system of […]
Microprocessor Based Digital filter
Microprocessor Based Digital filter: Microprocessor Based Digital filter – The implementation of any digital filtering consists of a series of multiplications of samples of the input and/or output signals by constants, and of the additions of these products. Thus the main building blocks which have to be present in digital filtering hardware are the following: […]
IIR Filter Design
IIR Filter Design 1-D: In this section some practical considerations relating to the methods for the design of IIR Filter Design filters are presented. In particular, the bilinear transform is considered along with its application to the digitization of rational transfer functions of classical analog filters defined on the s-plane or in the framework of […]
IIR Digital Filter Design Methods
IIR Digital Filter Design Methods: IIR Digital Filter Design Methods – Fettveis first suggested the use of one port reflection coefficients for the tranfer of analog filter properties from the analog domain to the digital filter domain, and thus produced the wave digital filter structure. Transformation of Passive Ladder Filter The reason why reflection coefficients […]
Digital Filter Design Window Method
Digital Filter Design Window Method: We describe the Fourier series technique as the first design method of 1-D FIR digital filters [Eq. (15.83)]. In this Digital Filter Design Window Method, given a frequency function H(ejω) with period 2π, an FIR Digital Filter Design Window Method with a transfer function corresponding to H(ejω) can be obtained by simply […]