This chapter builds on the author's prior work on signal-to-noise ratio (SNR) estimation by proposing a new stochastic maximum-likelihood-based (SML-based) approach for estimating the direction-of-arrival (DOA) of a single narrow-band amplitude-distorted wavefront received by any antenna array. The complex-valued circular AR (1) model with unknown coefficients is supposed to alter the distorted amplitude wavefront. The contribution of this chapter is the development of an approximate SML-based technique for estimating the DOA in a high SNR scenario. It demonstrates how to remove the noise and AR (1) nuisance (distortion) parameters from the investigated approximate stochastic likelihood function, yielding an SML DOA estimate via a one-dimensional (1-D) search. For several types of time-varying fading amplitudes, compact Cramer-Rao lower bound (CRB) formulas for the DOA parameter alone are constructed. The determination of numerous CRB properties is also made possible by the development of high and low SNR approximation equations for the. Finally, simulation results verify the theoretical study by demonstrating the effectiveness of the proposed approach.production performance. The tests were carried out using two identical 75-watt PV modules that were deployed in the same weather circumstances in Kirkuk City, Iraq, during the summer season. One was utilised as a standard module as a reference panel, while the other was used in all of the essential testing. Water circulation has been used to cool the PV module to an excellent soil, which has been used to assess the effect of hot weather and dust deposition on PV performance. The results show that temperature increases have an inverse effect on the fill factor (FF) and PV efficiency; on the other hand, the cooling process contributed to an increase of 11.8 percent in the voltage generated across the PV panel, while the reduction in voltage generation by unclean panels due to natural pollution deposition on the front of the panel for three months was about 3.8 percent when compared to clean panels. Improve its performance by performing periodic maintenance on the PV module to remove dust and adding the appropriate size of PV panels to compensate for the shortage in PV unit power production caused by hot weather that cannot be regulated.
Author (S) Details
Habti Abeida
Taif University, Department of Electrical Engineering, Al-Haweiah, 21974, Saudi Arabia.
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