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A modified Quasi-Yagi antenna with a vertical integrated balun is proposed for newly emerging long-term evolution (LTE) personal wireless communication standard applications. The influence of major parameters on antenna performance is simulated and studied through electro-magnetic simulation, and the optimal parameters of the antenna are obtained. The simulation results of the antenna show that the...
Sparse matrix-vector multiplication (SpMV) is the most important computational kernel, since its widely application in the scientific and engineering fields. In this paper, a series optimization methods of SpMV for CSR format have been approached. We focus on the underlying, paralleling and working set, and implement the library named as Combine Optimized SpMV for CSR format (COSC) which is the first...
This paper considers spectrally efficient antijamming system design based on message-driven frequency hopping (MDFH). As a highly efficient frequency hopping scheme, MDFH is particularly robust under strong jamming. However, disguised jamming from sources of similar power strength can cause performance losses. To overcome this drawback, in this paper, first, we propose an anti-jamming MDFH (AJ-MDFH)...
This paper considers highly efficient jamming resilient wireless system design. First, we introduce a collision free frequency hopping (CFFH) system based on the OFDMA framework and an innovative secure subcarrier assignment scheme. The secure subcarrier assignment algorithm is designed to ensure that: (i) Each user hops to a new set of subcarriers in a pseudo-random manner at the beginning of each...
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