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Wireless device portability and power efficiency are the two major challenges in modern device modeling. Voltage Controlled Oscillator (VCO) is one the most essential circuit used in wireless systems. A new three stage VCO design in 65nm technology is proposed in this paper and is compared with previous best Current starved VCO design on the basis of on-chip area utilization and power consumption...
We evaluate the encapsulation and packaging reliability in fully integrated, fully wireless 100 channel Utah Slant Electrode Array (USEA)/integrated neural interface-recording version 5 (INI-R5) by monitoring the extended long term in-vitro functional stability and recording longevity. The INI encapsulated with 6-µm Parylene-C was immersed in phosphate buffer saline (PBS) for a period of over 12 months...
Authors in this paper use angle of arrival (AoA) information to localize a network of 100 nodes with one anchor only. The maximum communication range of a node in a wireless sensor network is known. Number of hops is dynamic, depending upon backward communication from node to be localized to the node already localized. The nodes within communication range from each other exploit noisy AoA information...
4 ?? 4 ring array antennas are combined with commercially available and custom designed RF components to realize a base station operating for channel #1 of UWB communications. The 4 transmitters and receivers modules are developed using LNA, PA, buffer amplifiers, custom designed single and dual GCM mixers, and differential BPF and LPF. The GCM mixer is driven by a StLO poly-phase board that is realized...
The Internet has revolutionized communication, education, commerce and information access for its users worldwide. Unfortunately, the lack of copper/fiber infrastructure in the rural areas of the developing world has prevented a large majority of the human population from reaping the benefits of the Internet. While the number of mobile subscribers in the developing world has more than quadrupled in...
Cooperation in wireless networks has shown significant performance gains in comparison to legacy wireless networks. Cooperative wireless protocols achieve such efficiency by enabling cooperation among nodes to exploit spatial diversity. CoopMAC is a medium access control (MAC) protocol that enables cooperation by using an intermediate node as a helper to a direct communication under poor channel conditions...
Traditional rate adaptation solutions for IEEE 802.11 wireless networks perform poorly in congested networks. Measurement studies show that congestion in a wireless network leads to the use of lower transmission data rates and thus reduces overall network throughput and capacity. The lack of techniques to reliably identify and characterize congestion in wireless networks has prevented development...
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