Technical challenges for cognitive radio in the TV white space spectrum

Shellhammer, Stephen J.; Sadek, Ahmed K.; Zhang, Wenyi

doi:10.1109/ita.2009.5044964

Cited by 138 publications

(87 citation statements)

References 9 publications

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“…This implies that secondary users must have geolocation capability, while the database must be kept updated at all times, which incurs additional overhead. An additional challenge on using geolocation and database access is when secondary users are indoors where GPS connectivity may not be available due to the signal disruption from buildings, walls, etc., [14]. Although GPS is one of the most widely used localization techniques, alternative techniques for outdoor and indoor localization using cellular network and wireless local network signals are also possible [15].…”

Section: Wireless Communications and Mobile Computingmentioning

confidence: 99%

A Survey on Coexistence in Heterogeneous Wireless Networks in TV White Spaces

Maloku

Fazliu

Ibrani

2018

Wireless Communications and Mobile Computing

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With the advent of analog to digital transition in TV broadcasting, a substantial amount of spectrum has become available in TV bands. To take advantage of this, the idea for cognitive radios was introduced for two major reasons: better utilization of spectrum in urban areas and facilitation of wireless connectivity in rural areas. To achieve these two goals, however, many challenges have to be addressed first. Considering that these frequencies are commonly licensed, besides primary user detection, a serious challenge remains the detection and identification of other secondary devices and networks. The problems arising from this issue concern the coexistence problems happening from having several primary and secondary networks of different technologies cohabiting the same licensed spectrum simultaneously and from many secondary systems/users coexisting at the same place while using identical or different technologies. In this survey we provide a review of existing works and outline new challenges regarding coexistence and self-coexistence in heterogeneous wireless networks in TV White Spaces including a comparative analysis between selected coexistence mechanisms.

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Section: Wireless Communications and Mobile Computingmentioning

confidence: 99%

A Survey on Coexistence in Heterogeneous Wireless Networks in TV White Spaces

Maloku

Fazliu

Ibrani

2018

Wireless Communications and Mobile Computing

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“…However they are permitted in UHF band except channels (14-20) and channel 37.Channel 37 is a protected channel, used for radio astronomy measurements. Finally, Portable devices are not permitted on channels (14-20) since, some of those channels are used for public safety applications [2].…”

Section: Tv Band Spectrummentioning

confidence: 99%

A Modified TV Tuner for Spectrum Sensing in TV UHF Bands

Tahseen¹,

Abouelatta²,

Zekry³

2015

CAE

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A novel system containing low cost TV box has been designed to sense the UHF TV band spectrum.Microcontroller chip is programmed using micro Pascal software to control the TV tuner for scanning the TV band. The implemented system has been used to measure the utilization of the UHF TV band covering the frequency range from 470 to 860 MHz in Cairo (EGYPT). The sensing output data has been recorded and analyzed using suitable software. The obtained results demonstrate significant amount of spectrum available for deployment of cognitive radio systems and IEEE 802.22 WRAN standard in the UHF TV broadcasting band General TermsA new methodology for detecting UHF TV broadcasting band, TV tuner, UHF TV Spectrum usage.

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“…• directly via control channel such as Cognitive Pilot Channel (CPC) (Filo et al, 2009;Sallent et al, 2009); • estimated via signal processing techniques (Cardoso et al, 2008;Damljanovic, 2008;Hossain et al, 2009); • estimated via ad-hoc routing neighborhood discovery (Arachchige et al, 2008;Damljanovic, 2008;Krishnamurthy et al, 2009); • estimated via geo-location techniques (Shellhammer et al, 2009). …”

Section: Coalition Game For Spectrum Sensingmentioning

confidence: 99%