Author:Takyi, A; Densmore, M; Johnson, DDate:Sep 2016Collaborative sensing among secondary users in television white space (cognitive radio) networks can considerably increase the probability of detecting primary or secondary users. In current collaborative sensing schemes, all collaborative ...Read more
Author:Lysko, Albert A; Burger, Chris R; Hagopian, EDate:Aug 2019The work compares Wi-Fi and television white space (TVWS) technologies for practical broadband communication links, specifically in rural areas. The paper starts with an overview of advantages and limitations of Wi-Fi and TVWS in terms of ...Read more
Author:Mzyece, M; Mfupe, Luzango P; Mekuria, FissehaDate:Nov 2018Television white space (TVWS) networks based on geo-location spectrum databases (GLSDs) present an excellent opportunity to provide affordable broadband to underserved rural communities in Sub-Saharan Africa. In this paper, we explore potential ...Read more
Author:Hussien, HM; Katzis, K; Mfupe, Luzango PDate:Dec 2022Aiming at the problem of downlink power allocation in cognitive high-altitude platform wireless networks exploiting TV white space spectrum, it is mathematically formulated as a constrained optimization problem, and then an improved immune ...Read more
Author:Matogoro, J; Mfupe, Luzango P; Mvungi, N; Anatory, JDate:Oct 2021A study was conducted to investigate radio propagation characteristics in ultra-high frequency (UHF) bands over straight and circular paths in central Tanzania. The received signal power values (in dBm) were collected using a spectrum analyzer ...Read more
Author:Sebopetse, Nakampe S; Burger, Chris R; Mofolo, Raarone OM; Lysko, Albert ADate:Apr 2021This work discusses how the TCP window size affects the throughput and its measurements and estimated packet delivery delay on two experimental setups using freely available tools JPerf and PsPing. The first setup is a direct connection between ...Read more
Author:Masonta, Moshe T; Kola, LM; Lysko, Albert A; Pieterse, L; Velempini, MDate:Sep 2015Television white spaces (TVWS) refers to vacant channels in the ultra-high frequency (UHF) band between 470 and 690 MHz assigned for television broadcast and can be used opportunistically by secondary users (SUs). Research has shown that when ...Read more
Author:Hussien, HM; Katzis, K; Mfupe, Luzango P; Bekele, ETDate:Sep 2021Cognitive radio-based TV White Space (TVWS) is a promising idea which seeks to increase spectrum utilization by opportunistically accessing spectrum initially licensed to TV transmitters or incumbents. Orthogonal frequency multiple access ...Read more
Author:Lamola, MM; Johnson, DL; Lysko, Albert A; Maliwatu, R; Densmore, MDate:Aug 2019Commonly used WiFi is known to be ill-suited for penetrating vegetation and buildings and non-line-of-sight conditions. Television white space (TVWS) operates in ultra-high frequency (UHF) bands that overcome many of the penetration and ...Read more
Author:Habib, MH; Katzis, K; Mfupe, Luzango P; Ephrem, TBDate:Jul 2022The Uniform hexagonal array (UHA) sidelobe level (SLL) reduction is a crucial consideration for avoiding co-channel interference and improving Carrier-to-interference Ratio (CIR) performance in HAP wireless networks using the TVWS spectrum. ...Read more
Author:Lysko, Albert A; Van Belle, J-P; Budree, ADate:Aug 2019This paper proposes an initial rough model to evaluate the economic impact created by provision of Internet connectivity in an educational setting in a developing country. The research is based on three Television White Space technology (TVWS) ...Read more
Author:Lysko, Albert A; Nkosi, M; Lysko, MDDate:Dec 2023This paper summarises various experiences in testing outdoor television white space (TVWS) links, including near- line-of-sight (NLOS) conditions. The paper also touches on the influences of interference from operational television broadcasting ...Read more
Author:Zlobinsky, N; Mishra, AK; Johnson, DL; Lysko, Albert ADate:Nov 2021This work tackles a new angle to the Channel Assignment (CA) problem, which has otherwise been fairly widely studied for allocating channels optimally to access points and ad-hoc network nodes. Wireless Mesh Networks (WMNs) using Dynamic ...Read more
Author:Lysko, Albert ADate:Sep 2016South Africa's Council for Scientific and Industrial Research (CSIR) has developed and certified a geolocation spectrum database, with the country moving towards making its spectrum management more dynamic.Read more
Author:Mfupe, Luzango P; Montsi, L; Mekuria, FissehaDate:Oct 2013Broadband innovations for future wireless networks involves rapid sharing of radio frequency (RF) spectrum resources by means of dynamic spectrum access techniques (DSA) to satisfy immediate portfolio of heterogeneous demands of wireless IP ...Read more
Author:Masonta, Moshe T; Kliks, A; Mzyece, MDate:Sep 2013The use of unoccupied television (TV) frequency band (known as TV white space - TVWS) for non-broadcasting services is gaining momentum around the world. Especially in developing countries where the majority of the population are in under-served ...Read more
Author:Lysko, Albert A; Nelwamondo, Fulufhelo V; Mfupe, Luzango PDate:Jul 2020Television Whitespace (TVWS) can be described simply as unused space found between channels that are used in the ultra-high frequency (UHF) spectrum. TVWS frequencies span from 470 MHz - 694 MHz. With the TVWS, the Council for Scientific and ...Read more
Author:Lysko, Albert ADate:May 2017The world has just began taking advantage of the fourth generation (4G) communication technologies, whilst both research and industry communities are already starting with debates around 5G. Besides the antenna based and multiple-input ...Read more
Author:Hadzic, S; Phokeer, A; Johnson, DDate:Oct 2016This paper describes a network architecture to provide low cost last mile access and cloud services for local content sharing in a poorly resourced township environment. We describe how ICT solutions are developed in close partnership with ...Read more