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Molybdenum disulfide (MoS2), a member of the transition metal dichalcogenide (TMD) family, is a 2D semiconductor with a direct bandgap of ∼1.8 eV for single layers. Its bandgap allows for high Ion/Ioff metal-oxide semiconducting field-effect transistors (FETs). Exfoliated monolayer MoS2 FETs exhibit current saturation with on-state current densities of 300 µA/µm, as well as transconductances exceeding...
Recent development in electronics and wireless communications has enabled the improvement of low-power and low cost wireless sensors networks. Wireless Sensor Networks(WSNs) are a combination of autonomous devices transmitting locally gathered information to a so-called sink node by using multihop wireless routing. One of the most important challenges in WSNs is to design energy efficient routing...
In a distributed control wireless ad hoc network, multi-user interference plays a significant role in determining one-to-one communication throughput performance of the network. Although the effects of exposed/hidden terminals on the network throughput in a single-channel wireless ad hoc network have been extensively studied, the interference power computation at the receiver and its effect on the...
In many applications retransmission of lost packets are not permitted. In an OFDM system, due to channel fading, only a subset of carriers are usable for successful data transmission. If the channel state information is available at the transmitter, it is possible to take a proactive decision of mapping the descriptions optimally onto the good subcarriers and discard at the transmitter itself the...
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...
PLC's (programmable logic controllers) are the control hubs for a wide variety of automated systems and processes. Advanced control features, network connectivity and device interoperability are all capabilities increasingly demanded in a modern industrial application. To get in-depth knowledge of any system requires thorough studies of the system up to the designing level; this paper provides better...
Complementary codes are used in IEEE802.11b/g WLAN standard. For contention free operation with two or more users, the current CCK modulation can be enhanced by orthogonal Ear ZCZ sequence E(L,M,ZCZ) to provide contention free connectivity. In this paper, we simulate multi-user WLAN based on ZCZ modified CCK modulation for 11 Mbps data rate. Performance is analyzed to see the effect of zero correlation...
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...
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