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Transmit power control is vital to wireless body area networks (BANs), where due to their prevalence many BANs may be required to coexist reliably, with a requirement for reduced power consumption to significantly increase sensor battery lifetime. In this paper, we propose a socially optimal finite repeated non-cooperative transmit power control game, in order to mitigate radio interference amongst...
This letter investigates the joint design problem of transmission probability $(\nu)$ and transmit power $(p)$ in random access-based wireless peer discovery (RA-WPD) operations, in terms of reducing the power consumption of the peers. These $\nu$ and $p$ determine the number of transmitters and receivers in a half duplex operation and the link coverage; therefore, their effects should be managed...
This paper considers the power efficiency and transmission range optimization of wireless sensor nodes. A power consumption model is proposed, and the parameters are presented for several commercially available low-power wireless sensor node devices. Then the optimal transmission ranges to achieve the most energy efficiency are obtained for wireless sensor source nodes and relay nodes, respectively...
In this paper, an energy efficient adaptive modulation scheme is proposed for a wireless cognitive radio ad hoc network, where each node is equipped with cognitive radio and the network is an OFDMA system operating on time slots. In each slot, the users with new traffic demand will sense the spectrum and locate the available subcarrier set. Then they choose subcarriers with favorable channel condition...
Most existing ad hoc routing protocols attempt to minimize the number of hops from source to destination pairs. These routing protocols are all designed under the assumption of using only single data rate in the wireless channel. One of the current trends in wireless communication (e.g., IEEE 802.11b) is to enable devices to operate using many different transmission rates in order to accommodate a...
In this paper, we propose a cross-layer optimization approach that exploits retransmission diversity in wireless CDMA communications. Conventionally, data packets that are not correctly detected are usually dropped. These dropped packets can be used to help data packet detection. By exploiting all the retransmitted packets, data packets can be correctly detected with higher probability. The proposed...
In this paper, we address the issue of transmission power control (TPC) in wireless ad hoc networks. Power control plays an important role in energy saving and network performance enhancement. However, the existing TPC schemes either face the problem of hidden and exposed terminal or have additional hardware requirements. We propose a novel distributed power control protocol, called Receiver Initiated...
In this paper, we propose a cognitive radio-based multi-user resource allocation framework for mobile ad hoc networks using multi-carrier DS CDMA modulation over a frequency-selective fading channel. In particular, given pre-existing communications in the spectrum where the system is operating, in addition to potential narrow-band interference, a channel sensing and estimation mechanism is provided...
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