Interference to UHF-DTTV Channels by Unlicensed Devices

Bendov, O.

doi:10.1109/tbc.2006.883300

Cited by 9 publications

(2 citation statements)

References 5 publications

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“…The transition to the first generation of terrestrial digital television led to the spectrum formerly allocated for TV broadcasting being re‐allocated to mobile communication systems (e.x 4G LTE) . Through this action, the TV spectrum is effectively utilized, while the development of advanced and innovative unlicensed broadband services is provided to businesses and consumers . Based on that and the concept of CRs, the IEEE 802.22 standard was introduced to take advantage of the TV white‐spaces (TVWS) created when the TV signal moved from analogue to digital .…”

Section: Introductionmentioning

confidence: 99%

A proposed enhanced scheme for the dynamic frequency hopping performance in the IEEE 802.22 standard

Dimogiorgi

Hamouda

2016

Wireless Communications

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This paper presents an integrated scheme for the dynamic‐frequency‐hopping (DFH) technique provided in literature for the IEEE 802.22 standard supporting wireless regional area networks (WRANs). The performance of DFH is analyzed thoroughly for various channel models and for a multiple‐input multiple‐output systems. The core of this research is based on the coexistence of digital terrestrial TV broadcasting and the WRANs in the TV white space. The proposed technique aims at protecting the incumbent users from interfering with the cognitive broadband access in the TV spectrum. In order to achieve this, spectrum sensing is performed in the intended working channel in DFH while spectrum monitoring with an energy‐ratio (ER) algorithm is applied during the WRAN data transmission in the working channel. Hence, in the DFH‐ER algorithm, the reappearance of a digital terrestrial TV signal in a band occupied by the WRANs would be detected immediately. This will provide interference free performance for the licensed signal as well as reliable data transmission for the unlicensed ones. Both analyses and simulation results of the proposed DFH‐ER technique compared with the conventional DFH scenario exemplify the enhancement of the WRAN data transmission while protecting the digital terrestrial TV users. Copyright © 2016 John Wiley & Sons, Ltd.

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Section: Introductionmentioning

confidence: 99%

A proposed enhanced scheme for the dynamic frequency hopping performance in the IEEE 802.22 standard

Dimogiorgi

Hamouda

2016

Wireless Communications

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“…Thus, link adaptation on aggregated TVWS channels becomes more problematic. However, most of the existing research and/or implementation is primarily focused on how TVBD transmission impacts the DTV performance (e.g., [9], [10], [11]) or simply assumes that similar SINRs are experienced on available TVWS channels (e.g., [3] and [12]). Therefore, from the TVWS network design standpoint, it would be highly beneficial to investigate how rates should be adapted on multiple aggregated TVWS channels to accommodate the varied channel conditions and what is the throughput that can be achieved by the optimal link adaptation method.…”

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confidence: 99%

Link adaptation on aggregated TVWS channels

Lin

Demir

2013

2013 IEEE Wireless Communications and Networking Conference (WCNC)

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The availability of Television White Space (TVWS) [1] has attracted considerable attention in industry and academia. Given the relatively small amount of bandwidth allocated to each TVWS channel (e.g., 6, 7 or 8 MHz), and the non-contiguous nature of the allocation, channel aggregation ([2], [3]) is an attractive way to make full use of the available TVWS spectrum and to achieve higher throughput. In this paper we propose and analyze several link adaptation schemes in the context of channel aggregation. We first analyze the SINR conditions of multiple aggregated channels using a model of a modified 802.11n system to support TVWS operation. Then, we investigate three different link adaptation schemes and compute their MAC layer throughputs. Our results show that the SINR variance on the aggregated channels can be high, mainly due to the unique characteristics of TVWS spectrum, i.e., different maximum transmit powers imposed on different types of TVWS channels, and significant Digital TV (DTV) out-of-band emissions to adjacent TVWS channels. Both analytical and numerical results show that independent link adaptation based on each channel SINR provides much higher throughput than the single adaptation schemes, where a common rate is applied on the aggregated channels.

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Third order distortion in digital receiver front-ends as the dominant interference mechanism above 470 MHz

Rhodes

2008

2008 7th International Caribbean Conference on Devices, Circuits and Systems

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Interference to UHF-DTTV Channels by Unlicensed Devices

Cited by 9 publications

References 5 publications

A proposed enhanced scheme for the dynamic frequency hopping performance in the IEEE 802.22 standard

A proposed enhanced scheme for the dynamic frequency hopping performance in the IEEE 802.22 standard

Link adaptation on aggregated TVWS channels

Third order distortion in digital receiver front-ends as the dominant interference mechanism above 470 MHz

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