This paper is concerned with design of cascading CIC filter and FIR filter to improve the passband droop and stopband attenuation for decimation filter. Decimation filter has wide application in both analog and digital systems for data rate conversion as well as filtering. We have three class of filters FIR, IIR and CIC filters. IIR filters are simpler in structure, but not satisfy linear phase...

Orthogonal Frequency Division Multiplexing (OFDM) systems are sensitive to timing and frequency estimation errors, which causes inter-symbol-interference (ISI) and intercarrier-interference (ICI), leading to degradation in the system performance. An algorithm is presented in this paper, based on modified polyphase sequences; proposed for timing and frequency synchronization of OFDM system which...

The method for reconstruction and restoration of super resolution images from low resolution sequences presented here is an extension of Irani and Peleg's algorithm (“Improving Resolution by Image Registration”, CVGIP: Graphical Models and Image Processing, Vol. 53, No. 3, pp. 231-239, 1991). The input is a set of low resolution images that have been registered to a pixel translation accuracy. ...

Abstract This technical note looks at implementing high performance polyphase IIR filters with very low FPGA resource requirements. These structures have the property that order filters can be implemented with just multiplications. The filters can be shown to have low sensitivity to coefficient quantisation, leading to efficient implementation in fixed point. Furthermore the maximum gain at any...

Unitary and nonunitary lter banks with uniform frequency separation have been extensively studied in the past. Improvement in coding gain has been achieved when allowing for nonunitary lter banks in image coders. Subjective improvements can be achieved by employing nonuniform lter banks. The paper presents a method to construct nonuniform nonunitary perfect reconstruction lter banks. A polyphas...