Wireless Networks

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Two-phase downlink subcarrier allocation for multicell OFDMA systems
Wireless Networks - Tập 25 - Trang 2081-2090 - 2018
Tsung-Hsiu Chih, Szu-Lin Su, Tsung-Min Hung
To increase spectrum efficiency, the radio resource management with frequency reuse factor = 1 is usually adopted in multi-cell orthogonal frequency division multiple access systems. Such a reuse-one strategy results in severe co-channel interference, especially penalizing mobile users near the cell border. This paper presents an effective subcarrier-assignment algorithm to mitigate the co-channel...... hiện toàn bộ
Fuzzy logic based route optimization in a multihomed mobile networks
Wireless Networks - Tập 17 - Trang 213-229 - 2010
Sulata Mitra, Sumanta Pyne
The present work is a fuzzy logic based route optimization in multihomed mobile network. The mobile routers in the mobile network use best egress determination algorithm to identify its best egress interface for each service type supported by the mobile network dynamically and send the best egress interface per service type information to a local fixed node inside the mobile network. The mobile ne...... hiện toàn bộ
Channel estimation and error correction for UWOC system with vertical non-line-of-sight channel
Wireless Networks - Tập 26 - Trang 4985-4997 - 2020
B. Priyalakshmi, K. Mahalakshmi
Recently, underwater wireless optical communication (UWOC) system has placed more attention towards increasing data rate, high accuracy, higher bandwidth and providing highly secured transmission. Generally, light propagation in underwater medium is disturbed due to some degrading effects such as turbulence, scattering and absorption which will degrade the performance. Therefore, channel estimatio...... hiện toàn bộ
An adaptive anti-jamming system in HyperLedger-based wireless sensor networks
Wireless Networks - Tập 28 Số 2 - Trang 691-703 - 2022
Bacem Mbarek, Mouzhi Ge, Tomáš Pitner
Analysis of optimal threshold selection for spectrum sensing in a cognitive radio network: an energy detection approach
Wireless Networks - Tập 25 - Trang 3917-3931 - 2019
Alok Kumar, Prabhat Thakur, Shweta Pandit, G. Singh
The spectrum sensing is a key process of the cognitive radio technology in which the cognitive users identify the unutilized/underutilized primary users (PUs)/licensed users spectrum for its efficient utilization. The sensing performance of cognitive radio (CR) is generally measured in terms of false-alarm probability ( $...... hiện toàn bộ
Secure UAV communication against cooperative adaptive eavesdroppers
Wireless Networks - Tập 28 - Trang 1113-1128 - 2022
Jue Liu, Weiwei Yang
The flexibility of the adaptive eavesdropper (AE) who can act as a passive eavesdropper or active jammer adaptively makes the attack mode more powerful, which will bring new security threats for unmanned aerial vehicle (UAV) communications. In this paper, we investigate secure UAV communications under multiple cooperative AEs. A cooperative attack game (CAG) is proposed to get the optimal joint at...... hiện toàn bộ
Channel estimation using spatial partitioning with coalitional game theory (SPCGT) in wireless communication
Wireless Networks - Tập 27 Số 3 - Trang 1887-1899 - 2021
S. Dhanasekaran, J. Ramesh
An architectural framework for seamless handoff between IEEE 802.11 and UMTS networks
Wireless Networks - Tập 19 - Trang 411-429 - 2012
Maushumi Barooah, Sandip Chakraborty, Sukumar Nandi, Dhananjay Kotwal
In recent years, Cellular wireless technologies like GPRS, UMTS, CDMA and Wireless Local Area Network (WLAN) technologies like IEEE 802.11 have seen a quantum leap in their growth. Cellular technologies can provide data services over a wide area, but with lower data rates. WLAN technologies offer higher data rates, but over smaller areas, popularly known as ‘Hot Spots’. The demand for an ubiquitou...... hiện toàn bộ
Cross-layer enhanced time scheduling for multi-band OFDM UWB networks
Wireless Networks - Tập 16 - Trang 863-873 - 2009
Mehmet Keskinoz, Ozgur Gurbuz, Engin Masazade
Multi-band Orthogonal Frequency Division multiplexing based Ultra Wide-band (MB-OFDM UWB) technology is one of the strong alternatives for high data rate wireless personal area networks (WPANs) with low power consumption. The capacity of such systems is degraded by multi-path fading, shadowing, multi-user interference and noise. To improve system capacity under these adverse effects, in this paper...... hiện toàn bộ
Joint activity and channel estimation for asynchronous grant-Free NOMA with chaos sequence
Wireless Networks - - Trang 1-13 - 2023
Mingyi Qiu, Donghong Cai, Jing Zhao, Zhicheng Dong, Weixi Zhou
This paper considers an asynchronous grant-free non-orthogonal multiple access (NOMA) systems which can be applied in massive machine-type communications (mMTCs) and underwater IoT acoustic communication scenarios due to its high spectral efficiency and low power consumption characteristics. In particular, the system’s asynchronous reception of user signals can effectively reduce the additional ov...... hiện toàn bộ
Tổng số: 2,963   
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