Nonlinear influence in the frequency domain: Alternating series

Nonlinear influence in the frequency domain: Alternating series

Nonlinear Analysis of Nonlinearly Loaded Dipole Antenna in the Frequency Domain Using Fuzzy Inference

In this paper, inference model is proposed so as to analyze nonlinearly loaded dipole antenna. In modeling process, linear and nonlinear behavior of the problem is saved as simple and unchanged membership functions and the effect of incident wave on the induced voltage at different harmonies are then extracted easily. Consequently the model achieved is more efficient than previous studies using...

Nonlinear Circuit Simulation in the Frequency-domain∗

Simulation in the frequency-domain avoids many of the severe problems experienced when trying to use traditional time-domain simulators such as Spice [1] to find the steady-state behavior of analog, RF, and microwave circuits. In particular, frequency-domain simulation eliminates problems from distributed components and high-Q circuits by forgoing a nonlinear differential equation representatio...

Shrinkage estimation in the frequency domain of multivariate time series

Abstract. In this poster on analysis of high dimensional time series, we present a new non-parametric estimator of the spectral matrix with two appealing properties: compared to the traditional smoothed periodogram our shrinkage estimator has a smaller L2 risk and is numerically more stable due to a smaller condition number. We use the concept of ”Kolmogorov” asymptotics where simultaneously th...

Comparison of Non-Stationary Time Series in the Frequency Domain

In this paper we compare two non-stationary time series using non-parametric procedures. Evolutionary spectra are estimated for the two series. Randomization tests are performed on groups of spectral estimates for both related and independent time series. Simulation studies show that in certain cases the tests perform reasonably well. The tests are applied to observed geological and financial t...