发布求助
文献互助 智能选刊 最新文献

ICTC 2011最新文献

筛选
英文 中文
Adaptive operation scheme for quiet period in IEEE 802.22 system IEEE 802.22系统静默期自适应运行方案
ICTC 2011 Pub Date : 2011-11-18 DOI: 10.1109/ICTC.2011.6082642
Seung-Hoon Hwang, M. Rim
{"title":"Adaptive operation scheme for quiet period in IEEE 802.22 system","authors":"Seung-Hoon Hwang, M. Rim","doi":"10.1109/ICTC.2011.6082642","DOIUrl":"https://doi.org/10.1109/ICTC.2011.6082642","url":null,"abstract":"In IEEE 802.22 system, the quiet period for spectrum sensing consists of a series of consecutive energy detections followed by feature detection. In this paper, an adaptive operation scheme for quiet period in the IEEE 802.22 system is proposed and its performance is investigated, where the length of sensing interval is adaptively varied depending on the number of alarms by the energy detection. The effect of intra-frame cycle length is also investigated. Numerical results show that the proposed scheme may improve the channel utilization of cognitive radio system by 5% to 20%.","PeriodicalId":191169,"journal":{"name":"ICTC 2011","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124406627","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: 10
Uplink multi-point reception effect using aggregate base station architecture 采用聚合基站架构的上行多点接收效果
ICTC 2011 Pub Date : 2011-11-18 DOI: 10.1109/ICTC.2011.6082574
Soon-gi Park, B. Ryu, D. Kim
{"title":"Uplink multi-point reception effect using aggregate base station architecture","authors":"Soon-gi Park, B. Ryu, D. Kim","doi":"10.1109/ICTC.2011.6082574","DOIUrl":"https://doi.org/10.1109/ICTC.2011.6082574","url":null,"abstract":"Uplink multi-point reception is studied as part of a capacity enhancement method in this paper. It is based on the so-called aggregate base station architecture using remote radio heads. Its advantages are analyzed by the simulation. The simulation result shows that the capacity can be affected by the number of cell belonging to an aggregate base station and by the parameters related to the action of it.","PeriodicalId":191169,"journal":{"name":"ICTC 2011","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125587352","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: 3
Performance analysis of LTE enterprise femtocell using cooperative downlink transmission scheme 采用协同下行传输方案的LTE企业移动基站性能分析
ICTC 2011 Pub Date : 2011-11-18 DOI: 10.1109/ICTC.2011.6082577
Seung-Yeon Kim, Choong-Ho Cho, Hyong-Woo Lee, N. Park, B. Ryu, Seungwan Ryu
{"title":"Performance analysis of LTE enterprise femtocell using cooperative downlink transmission scheme","authors":"Seung-Yeon Kim, Choong-Ho Cho, Hyong-Woo Lee, N. Park, B. Ryu, Seungwan Ryu","doi":"10.1109/ICTC.2011.6082577","DOIUrl":"https://doi.org/10.1109/ICTC.2011.6082577","url":null,"abstract":"In this paper, we propose a cooperative transmission scheme (CTS) for system throughput enhancement in enterprise femtocell downlink systems. In our scheme, the user equipment (UE) is capable of receiving the desired signal from the serving femtocell base station (fBS) as well as from an adjacent fBS. Thus, the UE achieves an improved signal-to-interference ratio (SIR) by using two time synchronized signals. Performances of the proposed scheme are evaluated in terms of the call-level quality of service (QoS) (i.e., call blocking probability) and the packet-level QoS (i.e., outage probability). We first measure the resource utilization and call blocking probability for the downlink resources for various offered load in femtocell. Based on that, we obtain the outage probability and effective throughput of the system via computer simulations. Simulation results show that compared to the conventional scheme, the proposed scheme can reduce the UE's outage probability in the enterprise femtocell environment. In particular, a significant performance improvement can be achieved with the proposed CTS for UEs located at the cell edge.","PeriodicalId":191169,"journal":{"name":"ICTC 2011","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115181245","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: 7
Mitigating error propagation with an adaptive detect-and-forward strategy in cooperative relay channels 利用自适应检测转发策略在协同中继信道中减少错误传播
ICTC 2011 Pub Date : 2011-11-18 DOI: 10.1109/ICTC.2011.6082588
A. Aziz, Y. Iwanami
{"title":"Mitigating error propagation with an adaptive detect-and-forward strategy in cooperative relay channels","authors":"A. Aziz, Y. Iwanami","doi":"10.1109/ICTC.2011.6082588","DOIUrl":"https://doi.org/10.1109/ICTC.2011.6082588","url":null,"abstract":"This paper proposes a simple relaying protocol, namely Adaptive Detect-and-Forward (ADeF), for dual-hop transmissions in cooperative networks. In ADeF, relay nodes forward the received signal if the reliability information satisfies a predetermined threshold level. This simple strategy can adaptively select the symbols that are most reliable to the destination, and thus mitigate error propagation from noisy relays. We investigate two-hop relay schemes which implement only a hard-decision detect-and-forward (DeF) at relays. We examine the bit error rate (BER) performance for the proposed strategies against the baseline DeF through Monte Carlo simulations. We also suggest a list of threshold levels which provides optimal BER performance improvements. We find that the proposed schemes can obtain a considerable performance gain against the baseline scheme by using this simple reliability threshold at relays.","PeriodicalId":191169,"journal":{"name":"ICTC 2011","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117019904","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: 5
LED-based identification systems using wavelength division-adaptive interference cancellation for frequency offset correction 基于led的识别系统采用波分自适应干扰抵消进行频率偏移校正
ICTC 2011 Pub Date : 2011-11-18 DOI: 10.1109/ICTC.2011.6082602
Ying Yi, Kyujin Lee, Kye-san Lee
{"title":"LED-based identification systems using wavelength division-adaptive interference cancellation for frequency offset correction","authors":"Ying Yi, Kyujin Lee, Kye-san Lee","doi":"10.1109/ICTC.2011.6082602","DOIUrl":"https://doi.org/10.1109/ICTC.2011.6082602","url":null,"abstract":"This paper studies the performance degradation caused by frequency offset induced by optical Doppler shift in light emitting diode (LED)-based identification (LED-ID) systems, which integrate visible light communication (VLC). Through computer simulations and theoretical analysis, we can observe that frequency offset plays a significant role in the communication performance deterioration due to inter-carrier interference (ICI) and common phase error (CPE). Therefore, a scheme to correct the frequency offset by using wavelength division-adaptive interference cancellation (WD-AIC) was proposed. The main approach is to compare and analyze the proposed scheme and the conventional scheme, which employs convolutional coding. Finally, the proposed scheme shows a better BER performance than its channel coding counterpart when Doppler shift becomes severe.","PeriodicalId":191169,"journal":{"name":"ICTC 2011","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124634635","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: 1
QZSS L5 signal processing results in Korea QZSS L5信号处理结果在韩国
ICTC 2011 Pub Date : 2011-11-18 DOI: 10.1109/ICTC.2011.6082676
I. Joo, Sanguk Lee
{"title":"QZSS L5 signal processing results in Korea","authors":"I. Joo, Sanguk Lee","doi":"10.1109/ICTC.2011.6082676","DOIUrl":"https://doi.org/10.1109/ICTC.2011.6082676","url":null,"abstract":"The Michibiki is the first QZSS satellite, which was launched by a H-IIA rocket departing from the Tanegashima in Japan on 11 September, 2010 and technical and application verification of the satellite is being carried out. This paper presents the results obtained from processing of the L5 signal transmitted from the QZSS satellite. The QZSS L5 signal is collected in ETRI, Korea. And then, the acquisition and tracking are performed by the L5 software receiver implemented by ETRI. The tracking loop of FLL, PLL, and DLL, the EPL correlator output, and the C/No output results show that the QZSS L5 signal is normally processed. Finally, the paper demonstrates that the QZSS L5 signal could be used as GPS satellite based augmentation system in Korea as well as Japan.","PeriodicalId":191169,"journal":{"name":"ICTC 2011","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125125037","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: 1
A dynamic downlink load control scheme with virtual coverage adjustments for two-tier LTE systems 基于虚拟覆盖调整的两层LTE系统动态下行链路负载控制方案
ICTC 2011 Pub Date : 2011-11-18 DOI: 10.1109/ICTC.2011.6082644
N. Dung, C. Kang
{"title":"A dynamic downlink load control scheme with virtual coverage adjustments for two-tier LTE systems","authors":"N. Dung, C. Kang","doi":"10.1109/ICTC.2011.6082644","DOIUrl":"https://doi.org/10.1109/ICTC.2011.6082644","url":null,"abstract":"Abrupt increase in traffic load can cause traffic overloading situation, thereby degrading the performance of two-tier LTE systems, in which femtocells are overlaid with macrocells. In this paper, we propose a dynamic downlink load control scheme with virtual coverage adjustments for the two-tier LTE system, in which the coverage of hotspot macrocell is virtually controlled by adjusting handover parameters of serving cell and target cell. Simulation results show that our proposed control scheme can effectively prevent traffic overloading, and thus improve the performance of the two-tier LTE system. In particular, with the proposed scheme, the two-tier LTE system can also achieve system stability with the role of femtocells as a load shelter.","PeriodicalId":191169,"journal":{"name":"ICTC 2011","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123878998","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: 8
BoMR: A booster for mobile RFID readers BoMR:移动RFID阅读器的助推器
ICTC 2011 Pub Date : 2011-11-18 DOI: 10.1109/ICTC.2011.6082572
Si-Young Ahn, Jun-Seok Park, Y. Seong, Ha-Ryoung Ohd, Jong-min Kim
{"title":"BoMR: A booster for mobile RFID readers","authors":"Si-Young Ahn, Jun-Seok Park, Y. Seong, Ha-Ryoung Ohd, Jong-min Kim","doi":"10.1109/ICTC.2011.6082572","DOIUrl":"https://doi.org/10.1109/ICTC.2011.6082572","url":null,"abstract":"UHF RFID (Ultrahigh frequency radio frequency identification) is used in various application fields due to its advantages of cheap tag price and long reading range. Mobile RFID is a new technology that is expected to provide various services using RFID and cellular network. But the range of UHF RFID reader in cellular phone (mobile reader) is short. That is because the reader radiates low power of signal due to form factor and limited power supply. It is the obstacle to use it conveniently and to provide various services. In this paper, BoMR (a booster for mobile RFID readers) is designed and implemented to extend the range of a mobile reader. BoMR amplifies the signal of a granted reader and radiates it to tags. Consequently, the range is extended because the power of a tag's response signal is grown by amplified CW (continuous wave).","PeriodicalId":191169,"journal":{"name":"ICTC 2011","volume":"473 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123880292","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: 3
Another closed-form expression of average error rate for the Nth best relay selection AF relaying over Rayleigh fading channels 瑞利衰落信道上第n个最佳中继选择AF中继的平均错误率的另一个封闭表达式
ICTC 2011 Pub Date : 2011-11-18 DOI: 10.1109/ICTC.2011.6082559
Kyunbyoung Ko, Jeongtae Seo, Choongchae Woo
{"title":"Another closed-form expression of average error rate for the Nth best relay selection AF relaying over Rayleigh fading channels","authors":"Kyunbyoung Ko, Jeongtae Seo, Choongchae Woo","doi":"10.1109/ICTC.2011.6082559","DOIUrl":"https://doi.org/10.1109/ICTC.2011.6082559","url":null,"abstract":"In this paper, we derive another approximated closed-form average error rate as a more tractable form for the Nth best opportunistic amplify-and-forward (OAF) relay systems over Rayleigh fading channels. At first, we derive the Nth best relay's selection probability. Based on this, the average symbol error rate (ASER) using the moment generating function (MGF) is derived as the approximated form. In particular, the closed-form expression for error probability is derived using the probability density function (PDF)-approach. In addition, it is verified that the derived analytical one can be a more tractable form having the specified the number of multiple summations and the specified length of each summation. Simulation results are finally presented to validate derived numerical ones.","PeriodicalId":191169,"journal":{"name":"ICTC 2011","volume":"18 11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124247965","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: 8
Architecture and dynamic bandwidth allocation of multi-OLT PON systems 多olt PON系统的结构与动态带宽分配
ICTC 2011 Pub Date : 2011-11-18 DOI: 10.1109/ICTC.2011.6082636
Fahmida Rawshan, Youngil Park
{"title":"Architecture and dynamic bandwidth allocation of multi-OLT PON systems","authors":"Fahmida Rawshan, Youngil Park","doi":"10.1109/ICTC.2011.6082636","DOIUrl":"https://doi.org/10.1109/ICTC.2011.6082636","url":null,"abstract":"This paper proposes a multi OLT-PON system that allows multiple vendors to provide services to users in parallel through a single network. The Guaranteed Limited Dynamic Bandwidth Allocation (GLDBA) scheme is proposed for downstream transmission in the system. The existing Limited Dynamic Bandwidth Allocation (LDBA) scheme is modified to be used in the upstream transmission. Performance analysis shows that the proposed network and the DBA schemes can efficiently provide services from multiple vendors to access area.","PeriodicalId":191169,"journal":{"name":"ICTC 2011","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125997423","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: 5
下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信