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Orthogonal frequency division multiple (OFDM) has been introduced into long term evolution (LTE) because of its high spectral efficiency and robust anti-multipath fading ability. However, a major drawback of OFDM signals is high fluctuations of signal envelope. Peak-to-average power ratio (PAPR) is a well-known measure for the envelope fluctuations. Recently, another metric named cubic metric (CM)...
A main disadvantage of orthogonal frequency division multiplexing (OFDM) signals is the large envelope fluctuation that limits transmitter power efficiency. Peak-to-average power ratio and cubic metric (CM) are two metrics commonly used to quantify this envelope fluctuation, and now the latter is attracting increasing attention as it can more accurately predict the power de-rating of power amplifier...
Fiber channel protocol on avionics environment has become the first choice for interconnection of new generation advanced integrated avionic system networks, and fiber channel interface card is the primary device in fiber channel applications. This paper has discussed some pivotal technologies in logical function and driver design of fiber channel interface card. Then the interface card has been tested...
Although static sensor nodes have low computation and communication capabilities, they have specific properties, and can acquire stable neighboring nodespsila information, which can be used for detection of anomalies in networking and behaviors of the neighbor nodes, thus providing security for wireless sensor networks. In many attacks against sensor networks, the first step for an attacker is to...
In most clustered topology control algorithms of sensor networks, all the sensor nodes are clustered and the network backbone is formed by cluster head nodes and gateway nodes, while cluster nodes keep sleeping to reduce energy cost. A fault- tolerant topology control algorithm based on clustered sensor nodes is proposed in this paper, which is termed as KCCTC (K- Connected cluster topology control...
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