Wireless transmitters may be preferred in applications where new measurements are required since the cost may be lower than that associated with installing wired transmitters. However, there is a significant differences in the frequency and manner in which a new measurement value is updated by a wired transmitter vs. a wireless transmitter. Such differences must be taken into account when a wir...

Multiple antenna wireless systems are of practical interest because of their ability to provide improved capacity over single antenna wireless systems [1]. Weighting of sufficiently spaced antennas has long been used in receive diversity combiners for singleinput multiple-output (SIMO) wireless systems [2]. When the transmitter has channel knowledge, the extension of the SIMO weighting method t...

Channel reciprocity based key establishment techniques have attracted more and more attention from the wireless security research community for its easy implementation, low computational requirement, and small energy consumption. The basic idea of these techniques is to establish a shared key by utilizing the wireless channel reciprocity, i.e., the transmitter and receiver of one wireless link ...

Wireless power transmission technology based on coil coupling has been widely applied in various fields. However, the performance of system is affected by malposition coil-couple, which inevitable wireless (WPTS). In this study, a multi-transmitter array proposed to build more uniform magnetic flux density for WPTS, intending enhance WPTS case coil-couple malposition. The model built and differ...

In today's world of ever-increasing low-power portable electronics, from implants to wireless accessories, powering these devices efficiently and conveniently is an escalating issue. The proposed solution is to wirelessly recharge these lower-power portable devices through a common magnetic link with a higher-power portable device, such as a smartphone. Such a method is convenient for users, en...

2.1 A simple power control algorithm for a wireless network. First some background. We consider a network of n transmitter/receiver pairs. Transmitter i transmits at power level pi (which is positive). The path gain from transmitter j to receiver i is Gij (which are all nonnegative, and Gii are positive). The signal power at receiver i is given by si = Giipi. The noise plus interference power a...

As part of a multi-channel, multi-band evaluation platform for future wireless sensor network applications, an IEEE 802.15.4a standard conform transmitter is investigated. The paper gives an overview of our transmitter concept and ultra-wide band signals according to IEEE 802.15.4a. It analyzes the system design aspects of the transmitter for high flexibility such as modularity and independency...