The ability to support multiple channels of different communication standards, in the available bandwidth, is of importance in modern software defined radio (SDR) receivers. An SDR receiver typically employs a channelizer to extract multiple narrowband channels from the received wideband signal using digital filter banks. Since the filter bank channelizer is placed immediately after the analog-...

In this paper optimal FIR filter techniques are used to design any type of FIR filter. This techniques design the smallest-order FIR filter for a given set of specification. It is based on the concept that the filter exhibits ripples of equal length in the band-pass and band-stop. The design algorithm of these Equiripple FIR filter uses iterative polynomial interpolation. Input signal has a gre...

A novel method of the IIR filter design using the genetic algorithm is described in the paper. Newly, a simplex direct search method is included to the algorithm to enable its faster convergence. The design procedure is implemented in the MATLAB program environment. The genetic algorithm applied is able to find a solution of the task successfully. Filter coefficients quantization process is inc...

A new ripple feedback filter is presented for Analog/Digital mixed-mode amplifier (MMA) among audio applications. MMA is composed of two amplifiers: one is analog amplifier responsible for high fidelity and the other is digital switching amplifer in charge of high efficiency. To improve both total harmonic distortion (THD) and efficiency, passive RLC filter is needed at the output side of the d...

This paper describes a comparative study of designing digital filter of long duration sequences. Here we have adopted the approach of block filtering scheme “overlap save method” and compare with the optimized linear convolution scheme for designing digital filter. We have implemented both methods in FPGA Spartan 3A starter kit, XC3S700A device. Implementing both algorithms in FPGA hardware pla...

A digital filtering algorithm for continuous base flow separation is compared to physically based simulations of base flow. It is shown that the digital filter gives comparable results to model simulations in terms of the multiyear base flow index when a filter coefficient is used that replicates the watershed-specific time delay of model simulations. This way, the application of the heuristic ...

In our world, communication systems play an important role in day to day life. In wireless and wired communication systems, signals are to be upsampled at the transmitter. Digital up converter (DUC) is a sample rate conversion technique which is widely used to increase the sampling rate of an input signal. The digital up converter converts low sampled digital baseband signal to a pass band sign...

Absfracf—llhe design and synthesis of various types of microwave elliptic function filters has heen accomplished by a number of authors. However, one problem in this field which remains is the realization of compact narrow-band bandpass elliptic function filters. In this paper, a procednre is presented which enables this class of filters to be constricted in a compact digital form. Since the ph...