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Article
Joint sensing time and power allocation in cognitive networks with amplify-and-forward cooperation
Cognitive radio is a novel approach to cope with spectrum scarcity, in which either a network or a wireless node changes its transmission or reception parameters to communicate efficiently. However, it is diff...
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Article
A Bandwidth-Efficient Transmission Scheme Based on Spectrum Sensing Results in CR Networks
A bandwidth-efficient transmission scheme based on conservative spectrum sensing results without a common reporting channel is proposed for cognitive radio (CR) networks. A secondary relay node can assist a se...
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Article
Open AccessA power efficient MAC protocol for wireless body area networks
Applications of wearable and implanted wireless sensor devices are hot research area. A specialized field called the body area networks (BAN) has emerged to support this area. Managing and controlling such a n...
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Article
Mutual interference considered power allocation in OFDM-based cognitive networks: the multiple SUs case
Power allocation for secondary users (SUs) in cognitive networks is an important issue to ensure the SUs’ quality of service. When the mutual interference between the primary users (PUs) and the SUs is taken i...
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Article
Open AccessEvaluation of Implant Communication with Polarisation and Unslotted CSMA/CA Protocol in Wireless Body Area Networks
The performance of the implant inside a human body with polarisation, distance, and different power settings at the base-station is presented. In addition, the unslotted CSMA/CA protocol is studied for a heter...
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Article
Open AccessA TR-UWB Downconversion Autocorrelation Receiver for Wireless Body Area Network
Low power UWB receiver architecture is proposed for a Wireless Body Area Network (WBAN). This receiving technology is a synergy of existing downconversion-based narrowband rejection mechanism in RF front end a...
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Article
Multiple Access M-ary Modulation UWB System Based on Code-Selected Direct Sequence Bipolar PAM
This work presents an M-ary multiple access code-selected direct sequence (DS) ultra wideband (UWB) communication system. A high data rate multiple access UWB system can be obtained by a code selection mechanism....