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This paper shows a micro-strip antenna based on the yagi antenna principle, both singly and in a matrix. The suggested antenna can operate at a frequency of 10 GHz, which is in the X-band. The antenna specifications that were studied (Directivity, Gain, S11 Parameter, etc.). Two types of micro-strip Yagi antennas were simulated and compared; the first of which consisted of a single antenna and the second of which consisted of a matrix of two antennas. CST Microwave Studio Soft-ware 2019 was used for designing and simulation. The results were for antennas constructed for Gain (5.308dB) (9.682dB) and Directivity (6.016dB) (10.28), with the array antenna outperforming the first antenna by a wide margin.

Educators continuously search for the better methods and procedures to secure an interactive educational environment in order to attract the students' attention and urge them to exchange ideas and experiments. Information

Communication systems are basic in the modern world. OFDM has been used for noise abolition in LTE generation. In this paper, a simulation of OFDM system has been used by MATLAB GUI. Four cases have been studied, simulated, and analyzed. According to the type of noise in the channel, we used these parameters as an effect on the system. The effect of three parameters has been used for each case. The parameters include the number of the subcarrier in OFDM system, the number of samples on each subcarrier and the signal to noise ratio. The simulation used in this paper according to the mathematical communication equations gives accurate and fast results.

An efficiency of cochlea has a significant contribution in a quality of human hearing and in a language development of newborn. The efficiency of cochlea clinically measured using Distortion Product Otoacoustic Emission (DPOAE). The measurement mainly restricted by acoustic interferences that disrupt response estimation. The disrupted estimation gives rise to repetition in measurement for many times or probably inaccurate efficiency assessment. In this study, investigation of cochlea response estimation was considered based on signal processing (SP), which was regarded as preliminary step toward interference reduction. An in-vivo measurement was performed on a left ear of 36 years old female with normal hearing, where cochlea stimulation and response recording was conducted using personal computer sound card in conjunction of sensitive probe system of ER-10C. The response signals were recorded and then analyzed off-line using SP of Fast Fourier Transform (FFT) and Band Pass-Finite Impulse Response (BP-FIR) filter. Results show that DPOAE frequency components can be extracted using proposed SP method at interference-free situation, where BP-FIR parameters of bandwidth 50Hz-200Hz and order 32-2048 have to be adjusted based on stimulation parameters. The findings dedicate useful investigated parameters for real-time implementation, and for further SP development at interference situation.