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Safe and reliable communication technologies are the key to transmission line monitoring system. Currently, most of system use public network to communicate, condition monitoring data are difficult to transmit to the master station when signal is weak or no. To solve this problem, this paper proposes converged communication mode, that is public network and optical fiber converged. Based on the optical...
This paper proposes an improved cognitive radio system based on Wireless Statistic Division Multiplexing (WSDM) which is the modified version of the new-style cognitive radio system proposed by Li. The maximal user number is limited by the antenna number at receiver in Li's system. In this paper, we relax this limitation in multiplexing subsystem and propose a modified minimum description length (MDL)...
Blind source separation (BSS) and Independent component analysis has become hot topic in modern signal processing, which has attracted great interest in fields such as wireless communications, cognitive radio and 5G communications. For the particular advantage of ‘blind’, ICA has been introduced into the problem of communication anti-jamming. The real situation of wireless communication was mainly...
In this paper, we proposed a WLAN system interference evaluation model based on received signal power and working channels which reflects the system interference in the current channel configuration. Based on this model, we proposed a simple and effective channel assignment scheme in which a set of channels with minimum system interference values were selected as the APs working channels. Simulation...
Gossiping (all-to-all broadcast) is one of the important tasks in network communication. Most researches on gossiping focus on the transmission energy consumption problem. However, in military and other special applications, the latency performance is a more important indicator. In this paper, we consider the gossiping with multi-beam directional antenna model, and fixed size packet model. A centralized...
Long Term Evolution Advanced (LTE-A) is the fourth generation (4G) wireless cellular communication standard. A covert channel is a noticeable threat to network security because it is able to transfer data under the overt channel. In this paper, a new class of covert channel coined as SNsteg is proposed, designed for LTE-A system. The SNsteg peculiarly utilizes the feature of Sequence Number (SN) fields...
Multimedia streaming applications have high throughput requirement and stringent Quality-of-Service (QoS) guarantee. In this paper, we aim at designing a novel transmission and retransmission scheme, which integrates both the Network Coding and the Superposition Coding for wireless video broadcast networks by packet-erasure channel. Specifically, the Scalable Video Coding (SVC) technology is introduced...
A novel divide-by-4 injection-locked frequency divider (ILFD) is provide and was manufacture in the 0.18 μm 1P6M CMOS from tsmc. Conventional harmonic mixer divide-by-4 ILFD has limited locking range; this letter shows a wide locking range divide-by-4 ILFD designed with linear mixer technique. At incident power of zero dBm and at the drain-source bias of 1V, the locking range of the divide-by-4 is...
More and more study and application of ubiquitous healthcare system have been based on WBN (wireless body area networks). However, there are several important aspects that should be considered, such as the large amount sensing data, limited mobile terminal power supply, wireless bandwidth for video data flow. In ubiquitous healthcare networks, some personal health-care data are very important, such...
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