Noise Modelling for Near eld Array Optimization
نویسندگان
چکیده
In this letter an exact series representation for a near eld spherically isotropic noise model is introduced The proposed noise model can be utilized e ectively to ap ply well established far eld array processing algorithms for near eld applications of sensor arrays A simple array gain optimization is used to demonstrate the use of the new noise model
منابع مشابه
A Robust Numerical Approach for Array Calibration
In this paper, we focus on the problem of sensor array calibration in the presence of noise eld uncertainties. The objective is to compute a reliable estimate of the array response vector given nite sample estimates of the signal plus noise and noise only array covariances. These co-variances are computed from data collected at the sensor array with a calibration signal turned on and oo. Numeri...
متن کاملNear eld broadband array design using a radially invariant modal expansion
This paper presents a new method of designing a beamformer having a desired broadband beampattern and a focusing capability to operate at any radial distance from the array origin The methodology uses the wave equation based representation of beampatterns to identify an orthogonal basis set of elementary beampatterns by which any arbitrary beampattern can be constructed A set of elementary beam...
متن کاملAntenna array pattern synthesis via convex optimization
We show that a variety of antenna array pattern synthesis problems can be expressed as convex optimization problems, which can be (numerically) solved with great eeciency by recently developed interior-point methods. The synthesis problems involve arrays with arbitrary geometry and element directivity, constraints on far and near eld patterns over narrow or broad frequency bandwidth, and some i...
متن کاملIsotropic Noise Modelling for Nearfield Array Processing
In this paper, an exact series representation for a nearfield spherically isotropic noise model is introduced. The methodology uses the spherical harmonics expansion of the wavefield at a sensor to obtain the correlation between two sensors due to the nearfield isotropic noise field. The result is useful in nearfield application of sensor arrays. The proposed noise model can be utilized effecti...
متن کاملOptimal Reconfiguration of Solar Photovoltaic Arrays Using a Fast Parallelized Particle Swarm Optimization in Confront of Partial Shading
Partial shading reduces the power output of solar modules, generates several peak points in P-V and I-V curves and shortens the expected life cycle of inverters and solar panels. Electrical array reconfiguration of PV arrays that is based on changing the electrical connections with switching devices, can be used as a practical solution to prevent such problems. Valuable studies have been perfor...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2005