An analog active filter can not provide a very sharp cut-off for both higher and lower frequency component, while a digital signal processor (DSP) using digital filter effectively reduces the unwanted higher or lower frequency components within an audio signal. In this paper, we present the design and implementation of non real time and real time digital filter for audio signal. Experimental re...

A novel project is being presented here for implementation an auto ranging analog to digital converter for biomedical applications completely inside an FPGA i.e. an all-digital analog to digital (A/D) converter system. The only analog part is the auto ranging circuitry and an RC Integrator outside FPGA. The system outputs 24 bits and features a sigma delta ADC of 16 bits resolution, a range det...

This paper presents high speed digital Finite Impulse Response (FIR) filter relying on Wallace tree multiplier and Carry Select Adder (CSLA). Adder has three architectures such as basic CSLA using RCA (Ripple Carry Adder), CSLA using BEC (Binary to Excess-1 Converter) and CSLA using D-latch. In this paper we propose 4tap FIR Filter architecture using 16-bit CSLA using D-latch and 8-bit Wallace ...

We present an Abstract Interpretation-based framework for automatically analyzing programs containing digital filters. Our framework allows refining existing analyses so that they can handle given classes of digital filters. We only have to design a class of symbolic properties that describe the invariants throughout filter iterations, and to describe how these properties are transformed by fil...

281 ABSTRACT: DDC (Digital Down Converter), as a key part of digital receivers, aims to get low-speed digital baseband signals by extracting and filtering the digital signals transformed by high-speed ADC (Analog Digital Conversion). This paper employs the multi-rate process technique to design the DDC, i.e. firstly conducting data CIC (Cascade Integrator Comb) extraction, then HBF (HalfBand Fi...

This paper develops the theory and digital waveguide implementation for modeling threedimensional (3D) sound emission from wind instrument air columns. It is shown that the current acoustic theory regarding sound radiation from ducts and holes can be implemented in the digital waveguide context using properly designed digital filters. Each radiating sound source or hole requires a firstor secon...

Digital filtering is an integral part of many digital signal processing algorithms. Digital filters are characterized as either recursive [infinite impulse response (IIR)] or non-recursive [finite impulse response (FIR)] filters. IIR filters require a smaller order for the same set of specifications compared to FIR filters, while FIR filters provide a linear phase property. However, IIR filters...

Software defined radio has find important place in modern communication systems where majority of signal processing is performed in the digital domain using programmable DSPs.Digital down conversion (DDC) is one of the core technologies in SDR, as well as an important component of digital intermediate frequency receiver system. DDC use CIC decimation filters for sample rate decimation. CIC deci...

A digital design filterprogram is presented written in the MATLAB environment. Impulse response time editing is implemented together with various options for spectral domain processing. The filter inputs time-domain impulse response dataand outputs filter coefficients for both FIR and ILR implementations. Comprehensive display options are incorporated, including minimum-phase processing and CDS...