Technology Reports of Kansai University (ISSN: 04532198) is a monthly peer-reviewed and open-access international Journal. It was first built in 1959 and officially in 1975 till now by kansai university, japan. The journal covers all sort of engineering topic, mathematics and physics. Technology Reports of Kansai University (TRKU) was closed access journal until 2017. After that TRKU became open access journal. TRKU is a scopus indexed journal and directly run by faculty of engineering, kansai university.
Technology Reports of Kansai University (ISSN: 04532198) is a peer-reviewed journal. The journal covers all sort of engineering topic as well as mathematics and physics. the journal's scopes are
in the following fields but not limited to:
Direction of arrival (DOA) estimation methods of electromagnetic wave sources are necessary for very critical and significant applications, which is considered as a significant branch in array signal processing. There is a need to monitor spectrum and broadcast sources specifically in the military applications, which is very important for monitoring the direction of any threat. DOA is a set of calculations that employ for estimating the direction and number of incoming waves on the antenna elements at a specific range of frequency, which allows target detection and tracking. This paper presents types of super-resolution DOA algorithms with using uniform linear array (ULA) in case of white noise. As well as it clarifies the DOA estimation concepts with its mathematical model for each method. Consequently, we use MATLAB simulations to simulate each DOA method with various cases to evaluate its performance to obtain the required accuracy with the resolution for each DOA algorithm. Therefore, the main goal of this paper to show, which DOA algorithm achieves the best performance and better resolution for the all possible angles with the same number of antenna, and gives very high accuracy in target location estimation and its tracking.
This paper deals with the rotated constellations technique's performance, which results in additional diversity to enhance Bit Interleaved Coding and Modulation BICM in various fading channel environments that improve the overall DVB-T2 gain. The performance gain of the rotated constellation has been analyzed and compared with the case of using a non-rotated constellation. In this comparison, three constellation types have been used: QPSK, 16-QAM, and 64-QAM, with all available six code rates supported by the DVB-T2 system. The simulation has been performed with four different types of fading channels scenarios, including Gaussian, Ricean, Rayleigh, and 0 dB Echo channels. Finally, achieved results show an outstanding improvement in DVB-T2 performance when employing rotated constellation in terrible fading environments by choosing a particular parameters configuration.