Abstract This paper presents a study on the side-lobe level (SLL) reduction with transmission type metasurface (MTS) using concept of non-uniform array technique and transmit antenna. According to antenna technique, SLL can be controlled by controlling amplitude phase distribution simultaneously. Initially, is used design MTS. The radiation characteristics MTS are analyzed exciting rectangular ...

F-OFDM (Filtered-OFDM) is a flexible waveform that has been considered suitable for 5G and beyond systems its improved spectrum utilization, moderates PAPR, low OOB emission, multiple asynchronous sub-band transmission, high robustness to frequency selectivity. It can attain desirable balance between time localizations narrow bandwidths. also MIMO friendly. In this paper, comprehensive design a...

Digital filters are widely used in many digital signal processing applications. Therefore, digital filtering is one of the basic needs of digital signal processing. This paper introduces the definition and basic principles of FIR digital filters, and the design based on MATLAB.After the description of the process of design, the matlab program is used to implement FIR filter using modified coeff...

Monitoring transmission systems is a huge scientific focus to prevent any anomaly and malfunctioning damaging the system. Several methods were used investigate gears behaviour mainly its state. And until last century, vibrations signals most performing technique in this field. However, nowadays, other alternatives are considered more accurate accessible such as controlling motor current study o...

introduction: filtering can greatly affect the quality of clinical images. determining the best filter and the proper degree of smoothing can help to ensure the most accurate diagnosis. methods: forty five patient’s data aquired during brain phantom spect studies were reconstructed using filtered back-projection technique. the ramp, shepp-logan, cosine, hamming, hanning, butterworth, metz and w...

A multiple window method for estimation of a peaked power density spectrum is designed. The method optimizes a filter function utilizing the Karhunen–Loève basis functions of a known peaked spectrum as windows to reduce variance and bias in the locality of the frequency peak. For improving performance, a penalty function is used to suppress the sidelobes outside a given bandwidth. The improved ...

Effects of the windowing process, widely investigated by the scientific literature for narrow–band components embedded in white noise, is not sufficiently detailed when signals are corrupted by colored noise. Such a phenomenon can heavily affect the spectral parameters estimation of the noisy signal. In this paper effects of the windowing on the output of analog–to–digital converters with ∆Σ to...

Digital filters are pervasive in the present era of communication systems. As a result good digital filter performance is important and hence to design a digital finite impulse response (FIR) filter satisfying all the required condition is a demanding one. This report deals with the design of FIR digital filter using hamming window technique. This window is optimized to minimize the maximum (ne...

The surface mounted piezoceramic transducers and fiber optic sensor can detect signals in both symmetric and antisymmetric Lamb wave modes. Hanning windowed sine torn bursts were used for the piezoceramic transducer excitation signals. In order to overcome the difficulties in the signal processing of the simultaneous modes, the symmetric and antisymmetric modes were separated by using the two s...

UNLABELLED The purpose of this study was to investigate the quantitative properties and effects of ordered-subset expectation maximization (OSEM) on kinetic modeling compared with filtered backprojection (FBP) in dynamic PET studies. Both phantom and patient studies were performed. METHODS For phantom studies dynamic two-dimensional emission scans with 10-min frames and 20-min scan intervals ...