Ultra Wideband Communications

Modified U-Slot Stacked Micro-Strip Patch Antenna for Ultra-Wideband Applications in S Band, C Band and X Band

The U-slot micro-strip patch antennas were originally developed for bandwidth broadening applications. This study presents a transmission line feed to modify the U-slot stacked rectangular micro-strip patch antenna for Ultra-Wide Band (UWB) communications. The modified antenna has a U-cut loaded with parallel slits and corner slots and is printed on a dielectric substrate of FR4 with relative p...

Outage Probability Bound and Diversity Gain for Ultra-Wideband Multiple-Access Relay Channels with Correlated Noises

In this paper, Ultra-wideband (UWB) multiple access relay channel with correlated noises at the relay and receiver is investigated. We obtain outer and inner bounds for the IEEE 802.15.3a UWB multiple access relay channel, and also, a diversity gain bound. Finally, we evaluate some results numerically and show that noise correlation coefficients play important role in determining relay position.

Ultra Wideband vs. Narrowband Communications

Ultra wideband (UWB) wireless communication has been the subject of extensive research in recent years due to its potential applications and unique capabilities. However, many important aspects of UWB-based communication systems have not yet been thoroughly examined. The area of narrow band communication is well developed. The objective of this paper is to present Ultra Wideband (UWB) communica...

Ultra Wideband Direct Chaotic Communications for IEEE 802.15.4a Standard

Ultra wideband communications based on chaotic signal is considered for low data rate, ranging application that is under standardization by the task group IEEE 802.15.4a. The current standard works are introduced and the proposed direct chaotic system is introduced. The PHY layer including transceiver, modem, and a ranging function are designed and implemented to realize a communication with lo...

Signal Processing Algorithms for Ultra-Wideband Wireless Communications

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Multiple-Input Multiple-Output Antennas for Ultra Wideband Communications