2011 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN)最新文献_第3页

UHF white space in Europe — A quantitative study into the potential of the 470–790 MHz band 欧洲的超高频空白空间-对470 - 790mhz频段潜力的定量研究

2011 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN) Pub Date : 2011-05-03 DOI: 10.1109/DYSPAN.2011.5936207

J. van de Beek, J. Riihijarvi, Andreas Achtzehn, P. Mahonen

{"title":"UHF white space in Europe — A quantitative study into the potential of the 470–790 MHz band","authors":"J. van de Beek, J. Riihijarvi, Andreas Achtzehn, P. Mahonen","doi":"10.1109/DYSPAN.2011.5936207","DOIUrl":"https://doi.org/10.1109/DYSPAN.2011.5936207","url":null,"abstract":"In this paper we study the availability of TV white spaces in Europe. We focus specifically on the 470–790 MHz UHF band that is still predominantly used for TV broadcasting also after the digital dividend (frequency reallocation as part of transition to digital TV), which has taken place or is ongoing in several European countries. We find that in the countries used in our studies, approximately 56% of the TV channels are unused, when averaged over the whole geographic area. Considering the average over population instead of geographic area reduced the mean available white space to 49% of the channels. Our results confirm quantitatively the often stated expectation that there are indeed fewer white spaces available in Europe compared to, for example, the United States. We also study the influence of different modeling assumptions on our results, especially focusing on the impact of the choice of propagation model. Our results show that changing from statistical ITU-R model to the Longley-Rice irregular terrain model does not cause a major change in the overall estimated availability of white spaces. However, changing the propagation model can significantly affect especially the local variability of the estimated availability of spectrum. This underlines the importance of using right system models in various studies before making too far-reaching conclusions.","PeriodicalId":119856,"journal":{"name":"2011 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116109116","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 87

Iterative cooperative sensing on shared primary spectrum for improving sensing ability 基于共享一次频谱的迭代协同感知，提高感知能力

2011 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN) Pub Date : 2011-05-03 DOI: 10.1109/DYSPAN.2011.5936257

M. Ohta, T. Fujii

引用次数: 0

IPTV delivery using cognitive radio principles IPTV传输使用认知无线电原理

2011 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN) Pub Date : 2011-05-03 DOI: 10.1109/DYSPAN.2011.5936256

T. Farnham

引用次数: 3

Peak power reduction of flexible OFDM waveforms for cognitive radio 认知无线电中柔性OFDM波形的峰值功率降低

2011 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN) Pub Date : 2011-05-03 DOI: 10.1109/DYSPAN.2011.5936268

Baris Ozgul, P. Sutton, L. Doyle

引用次数: 3

Bounding the error of path loss models 限定路径损失模型的误差

2011 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN) Pub Date : 2011-05-03 DOI: 10.1109/DYSPAN.2011.5936271

Caleb T. Phillips, D. Sicker, D. Grunwald

引用次数: 106

Virtual occupancy in cognitive radio 认知无线电中的虚拟占用

2011 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN) Pub Date : 2011-05-03 DOI: 10.1109/DYSPAN.2011.5936221

M. Burke, Bridget T Lally, A. Kerans

{"title":"Virtual occupancy in cognitive radio","authors":"M. Burke, Bridget T Lally, A. Kerans","doi":"10.1109/DYSPAN.2011.5936221","DOIUrl":"https://doi.org/10.1109/DYSPAN.2011.5936221","url":null,"abstract":"Cognitive radio technologies have the potential to increase the efficiency and effectiveness with which the radiofrequency spectrum is used. However, before cognitive radio devices are brought into widespread use, planning and regulatory arrangements must be considered and developed where appropriate to ensure adequate protection for existing users. This paper addresses the issue of harmful intermodulation interference caused by the mixing of a transmission from a cognitive radio device with that from a licensed transmitter in the land mobile radio service. Due to the generation of intermodulation products, seemingly open channels may be unable to be used by cognitive radio devices. This situation is termed virtual occupancy. In this paper, a model is described to characterise the effect of virtual occupancy on the availability of channels for use by a cognitive radio device in the land mobile service in the radiofrequency band from 450 to 470 MHz. The results show that for areas where the spectrum is highly allocated, virtual occupancy could be a significant barrier to the deployment of cognitive radios in the land mobile radio service.","PeriodicalId":119856,"journal":{"name":"2011 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129063523","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Multi-channel multi-stage spectrum sensing: Link layer performance and energy consumption 多通道多级频谱感知:链路层性能和能耗

2011 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN) Pub Date : 2011-05-03 DOI: 10.1109/DYSPAN.2011.5936203

Wesam Gabran, P. Pawełczak, D. Cabric

引用次数: 6

Digital switchover and regulatory design for competing white space usage rights 竞争空白空间使用权的数字切换和监管设计

2011 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN) Pub Date : 2011-05-03 DOI: 10.1109/DYSPAN.2011.5936222

B. Freyens, M. Loney

引用次数: 14

Spectrum requirements for TV broadcast services using cellular transmitters 使用蜂窝发射机的电视广播业务的频谱要求

2011 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN) Pub Date : 2011-05-03 DOI: 10.1109/DYSPAN.2011.5936211

J. Huschke, J. Sachs, K. Balachandran, Jorgen Karlsson

{"title":"Spectrum requirements for TV broadcast services using cellular transmitters","authors":"J. Huschke, J. Sachs, K. Balachandran, Jorgen Karlsson","doi":"10.1109/DYSPAN.2011.5936211","DOIUrl":"https://doi.org/10.1109/DYSPAN.2011.5936211","url":null,"abstract":"Wide-spread provisioning of TV services has strongly shaped the cultural development since the last century; terrestrial radio broadcast transmission has been the original form of TV distribution. Although the majority of TV reception is today based on alternative distribution means, like cable or satellite, TV broadcast enjoys still a significant amount of allocated terrestrial spectrum (∼300 MHz). However, it has been identified that TV broadcast does not efficiently use its allocated spectrum. At the same time, other spectrum users like mobile communication systems experience a tremendous growth and demand for spectrum. The scarcity of radio spectrum has led the US FCC rule that additional 500 MHz of spectrum are to be identified for mobile broadband systems in the next decade — out of which 120 MHz are to come from the TV band in the next 5 years. In this paper we identify an alternative transmission architecture for TV distribution based on cellular LTE MBMS, with densely placed low-power transmitters that transmit in a synchronized single frequency network. It is demonstrated that in this way a full frequency reuse at all sites is possible, in contrast to the large reuse distances in high-power high-tower TV transmission. As a result, we show that it is possible to support TV services with 84 MHz of spectrum via LTE MBMS, in contrast to the 300 MHz used by today's ATSC TV broadcast system. This approach can be realized in a cost-effective manner by re-using existing mobile network infrastructure and we also show that the total radiated power can be decreased.","PeriodicalId":119856,"journal":{"name":"2011 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134545110","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 32

Monitoring-based spectrum management for expanding opportunities of white space utilization 基于监测的频谱管理，以扩大空白空间利用的机会

2011 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN) Pub Date : 2011-05-03 DOI: 10.1109/DYSPAN.2011.5936216

K. Muraoka, H. Sugahara, M. Ariyoshi

{"title":"Monitoring-based spectrum management for expanding opportunities of white space utilization","authors":"K. Muraoka, H. Sugahara, M. Ariyoshi","doi":"10.1109/DYSPAN.2011.5936216","DOIUrl":"https://doi.org/10.1109/DYSPAN.2011.5936216","url":null,"abstract":"Spectrum management is one of the key functions needed for opportunistic spectrum access (OSA) to utilize white space without causing harmful interference to incumbent receivers. Geo-location database approaches using radio propagation estimation have been regarded as practical spectrum management methods. However, propagation models inevitably include an estimation error of path loss in actual radio environments, resulting in estimation error of carrier to interference ratio (CIR) of the incumbent receivers. Consequently, an allowable transmit power of the opportunistic system has to be limited to keep the CIR at a required level. This could prevent white space from being efficiently utilized. To improve the accuracy of CIR estimation, we propose monitoring-based spectrum management. In the proposed technology, referred to as Interference Monitoring, a monitoring node located near the incumbent receivers actually measures both the interference signals and the incumbent signals. Using the measurement results, the CIR estimates are compensated based on minimum mean square error (MMSE) criterion. The proposed Interference Monitoring can be extended cooperatively to utilize spatial diversity. Analytical evaluations assuming a simple cellular system model show that the Interference Monitoring can more accurately estimate CIR, and thus it can significantly increase the allowable transmit power. For an urban macro cell, the Interference Monitoring with a single node achieved more than a 4 dB increase of the transmit power; the Cooperative Interference Monitoring with 4 nodes achieved more than a 7 dB increase. Thus, the Interference Monitoring can expand opportunities for white space utilization without increasing the interference to the incumbent system.","PeriodicalId":119856,"journal":{"name":"2011 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131705114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 13