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Recent work shows that sink mobility along a constrained path can improve the energy efficiency in wireless sensor networks. However, due to the path constraint, a mobile sink with constant speed has limited communication time to collect data from the sensor nodes deployed randomly. This poses significant challenges in simultaneously improving the amount of data collected and prolonging network lifetime...
In distributed antenna systems (DAS), the scenario that each antenna port is a multi-antenna array with multi-user is far beyond thoroughly studied. In this paper, the performance of four extended methods for DAS downlink transmission are analyzed and compared in such a scenario, two of which are based on the block diagonalization (BD) algorithm, namely joint BD and intra BD method. The other two...
The advantages and the flexibility introduced into the hardware implementation by partial dynamic reconfiguration have rapidly changed the design flow of embedded systems. Configuration management is an important issue in operating system for dynamically reconfigurable system-on-chip. Reconfiguration overhead affects the performance of reconfigurable system. This paper presents a hardware implemented...
In this paper, the downlink zero-forcing beamforming strategy under perfect channel state information at the transmitter (CSIT) for the case of random packet arrivals is investigated. Under this setting, the relevant fairness criterion is the stabilization of all buffer queues which guarantees a bounded average delay for all users. In case of queue stability is the goal, it can be shown that allocating...
In this paper, the capture effect is taken into the performance analysis of the IEEE 802.11 DCF in a wireless local area network. Different from the previous literatures that were based on the Rayleigh fading channels model, we consider the capture phenomenon with the more general Rician fading channels for the first time in order to present a performance analysis method which can provide a more realistic...
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