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Orbital angular momentum (OAM) provides extra degrees of freedom to improve spectrum efficiency. However, the harsh requirement that transmit antenna(s) and receive antenna(s) need aligning throws out a great challenge to its application. To investigate the reason of performance degradation caused by misalignment, we first consider uniform circular array (UCA) based OAM system and set up two free...
Channel mismatches of time-interleaved analog-to-digital converters (TIADC) would result in significant decline of dynamic performance, especially in signal-to-noise and distortion ratio (SNDR) and spurious-free dynamic range (SFDR). However, as one kind of the channel mismatches, nonlinearity mismatch has not been widely investigated. In this paper, we analyze the characteristics of nonlinearity...
Reliable co-channel bidirectional transmission in wireless networks is moving towards reality by employing the emerging full-duplex (FD) technology. Enhanced by FD-capable nodes, a future wireless network can be made up merely with pairs of bidirectional communicating nodes where each pair occupies a block of orthogonal resource to avoid interference, referred to as pure-FD system. In this paper,...
Aim at performance downgrade of loitering detection in the case of motion target being motionless of short duration or multiple targets having crisscross motion, furthermore, loitering detection pays more attention to trajectory of motion target than itself, so this paper proposed a method of video loitering detection based on dynamic programming. First, we extract characteristic points from every...
According to the HP memristor model with linear do pant drift, the electrical characteristics of memristor are analyzed. Then, the transmission characteristics of memristor based noninverting op amplifier are investigated. The theoretical results are well demonstrated by the SPICE circuit simulation with a published memristor sub circuit with linear do pant drift.
The propagation of high-frequency electromagnetic plane wave in the dielectric is complex, and the energy distribution is uneven after scattering. Aimed at these problems, the propagation of high-frequency electromagnetic plane wave (microwave) in dielectric is researched in this paper by finite element software ANSYS. The electromagnetic scattering results are obtained by establishing and solving...
Since the stopped buses at bus station, there occurs the potential effect of capacity of adjacent lane. With the combination of the related results of traffic flow theory and queuing theory, the qualitative and quantitative analysis were worked out separately. Based on the effect time of bus stop on capacity of adjacent lane, the effect time model of bus station was established and then two capacity...
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