Abstract Accurate spectral measurement and wavelength determination are fundamental vital for many fields. A compact spectrum analyzer with high performance is expected to meet the growing requirements, speckle-based a potential solution. The basic principle based on using random medium establish speckle-to-wavelength mapping relationship reconstruction. This article introduces current analyzer...

In this paper, a precompliance test-set for the measurement of conducted emissions based on a medium-level sampling oscilloscope and on a fast filtering algorithm is presented. This system has been designed as a low-cost alternative to the typical precompliance test-sets that are based on spectrum analyzers equipped with EMC filters and peak detectors. Experimental examples of the results obtai...

The propagation path loss models may give different results if they are used in different environments other than in which they were designed. In this paper we compare the different path loss propagation models with measured field data and find out the model which is giving results nearer to the field measured data. In this we used many path loss models For comparative analysis. The field measu...

Two techniques are commonly used to measure NF: the Y-factor method and the cold-source method. The Y-factor or hot/ cold-source method is the predominant approach and is most commonly implemented with noise-figure analyzers and spectrum analyzer-based solutions. In contrast, the cold-source method is usually performed using vector network analyzers (VNAs), which provide magnitude and phase inf...

| Based on the least mean squares (LMS) algorithm , the LMS spectrum analyzer can be used to re-cursively calculate the discrete Fourier transform (DFT) of a sliding window of data. In this paper, we compare the LMS spectrum analyzer with the straightforward non-adaptive implementation of the recursive DFT. In particular , we demonstrate the robustness of the LMS spectrum analyzer to the propag...

Qubits have been used as linear spectrum analyzers of their environments. Here we solve the problem of nonlinear spectral analysis, required for discrete noise induced by a strongly coupled environment. Our nonperturbative analytical model shows a nonlinear signal dependence on noise power, resulting in a spectral resolution beyond the Fourier limit as well as frequency mixing. We develop a noi...