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Non-orthogonal multiple access (NOMA) is a promising technology for handling massive connectivity in future 5G wireless networks. Even though the spectral efficiency can be promoted, the transmission reliability is sometimes poor, due to the introduced multiple access interference (MAI), and the computational complexity for multiuser detection is usually high in NOMA. To solve this problem, we investigate...
In this paper, we address the power allocation problem over multibeam satellite downlinks. Different from conventional methods taking system throughput or rate matching as the optimization object, here this problem is modeled as energy efficiency (EE) optimization under the consideration of limited power resource in satellite. Furthermore, the imperfect channel state information (CSI) is taken into...
In this paper, the ergodic capacity (EC) of a land mobile satellite (LMS) system using dual-polarized antennas for transmit diversity is analysed. Three key channel parameters, i.e. cross-polarization discrimination (XPD), transmit and receive correlation coefficients and Ricean K-factor are included in channel modeling and their effects on the EC are investigated. In particular, we derive the estimated...
The color mark recognition is a key step in Mirosot, the recognizing results affect the orientation angle to a great extent. During the capturing process there are some loss of color mark because of the environmental disturbing light, which can lead to a big error by calculation. For the above phenomenon, a new algorithm is designed based on the LSM (least square method), in which a circle is adopted...
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