2015 IEEE Wireless Communications and Networking Conference Workshops (WCNCW)最新文献_第6页

Low complexity higher order QAM modulation for IDMA system IDMA系统的低复杂度高阶QAM调制

2015 IEEE Wireless Communications and Networking Conference Workshops (WCNCW) Pub Date : 2015-03-09 DOI: 10.1109/WCNCW.2015.7122539

T. T. T. Nguyen, L. Lanante, Y. Nagao, H. Ochi

{"title":"Low complexity higher order QAM modulation for IDMA system","authors":"T. T. T. Nguyen, L. Lanante, Y. Nagao, H. Ochi","doi":"10.1109/WCNCW.2015.7122539","DOIUrl":"https://doi.org/10.1109/WCNCW.2015.7122539","url":null,"abstract":"Interleave division multiple access (IDMA) is a Non-Orthogonal Multiple Access (NOMA) technique regarded as an enabling technology for next generation wireless systems. IDMA can improve the system efficiency by supporting multiple access for a large number of stations. For high spectral efficiency transmission in IDMA, previous works proposed systems in the context of Superposition Coded Modulation (SCM) where multiple layers of BPSK or QPSK modulated symbols are transmitted simultaneously. However this method has a very high complexity due to the high number of streams that need to be separated in the multi-user detection of the receiver. In this paper, instead of SCM, we employ QAM modulation up to 256-QAM for high spectral efficiency transmission. We show our receiver architecture which uses a soft demapper that significantly decreases the receiver detection complexity. While a maximum number of users that can be accommodated in the proposed system is slightly less than the conventional, our proposed system is much more suited in modern multi-mode transceivers aside from the fact that it needs about 25% complexity compared with SCM-QPSK.","PeriodicalId":123586,"journal":{"name":"2015 IEEE Wireless Communications and Networking Conference Workshops (WCNCW)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129897333","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

A non-preemptive mac protocol for multi-channel cognitive radio networks 多信道认知无线网络的非抢占mac协议

2015 IEEE Wireless Communications and Networking Conference Workshops (WCNCW) Pub Date : 2015-03-09 DOI: 10.1109/WCNCW.2015.7122554

Miguel Luís, Rodolfo Oliveira, R. Dinis, Luís Bernardo

引用次数: 4

Indoor planning optimization of ultra-dense cellular networks at high carrier frequencies 高载波频率下超密集蜂窝网络室内规划优化

2015 IEEE Wireless Communications and Networking Conference Workshops (WCNCW) Pub Date : 2015-03-09 DOI: 10.1109/WCNCW.2015.7122523

Saray Renilla Lamas, D. González, Jyri Hämäläinen

{"title":"Indoor planning optimization of ultra-dense cellular networks at high carrier frequencies","authors":"Saray Renilla Lamas, D. González, Jyri Hämäläinen","doi":"10.1109/WCNCW.2015.7122523","DOIUrl":"https://doi.org/10.1109/WCNCW.2015.7122523","url":null,"abstract":"Cellular communications have witnessed an exponential growth over the last few years. The challenges the industry faces for the next decade arise the need for significant changes, i.e., new paradigms away from just incremental advances in the current technologies. Network densification and high frequency communications are widely-recognized as cornerstones of this revolution. Understanding the needs of the market and identify key scenarios are also of paramount importance. Without a doubt, indoor coverage, concentrating a significant part of the demand, deserves special attention due to its strategic importance and technical issues. This paper makes a contribution in this field by introducing a novel framework for indoor planning of dense cellular networks based on millimeter Waves (mmW), a promising approach to provide extremely high data rates to indoor users according to the expectations of the future fifth generation (5G). Thus, by taking advantage of these two paradigms, the proposed planning framework, based on multiobjective optimization and ray-tracing techniques, succeeds in providing effective means to determine near-optimal network configurations that are both scenario-specific and optimized for arbitrary service demand distributions. The results show that such topologies provide the best tradeoff among several conflicting performance indicators, such as capacity, network cost, and cell-edge performance.","PeriodicalId":123586,"journal":{"name":"2015 IEEE Wireless Communications and Networking Conference Workshops (WCNCW)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132551259","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: 19

A recursive algorithm for joint time-frequency wideband spectrum sensing 一种时频联合宽带频谱感知递归算法

2015 IEEE Wireless Communications and Networking Conference Workshops (WCNCW) Pub Date : 2015-03-09 DOI: 10.1109/WCNCW.2015.7122560

J. Bruno, B. L. Mark

引用次数: 8

Algorithm design and analysis for network coding in D2D underlay communications D2D底层通信中网络编码的算法设计与分析

2015 IEEE Wireless Communications and Networking Conference Workshops (WCNCW) Pub Date : 2015-03-09 DOI: 10.1109/WCNCW.2015.7122574

A. Bhorkar, C. Ibars, Pingping Zong

引用次数: 2

Optimum welch FFT segment size for duty cycle estimation in spectrum awareness system 频谱感知系统中最优welch FFT分段占空比估计

2015 IEEE Wireless Communications and Networking Conference Workshops (WCNCW) Pub Date : 2015-03-09 DOI: 10.1109/WCNCW.2015.7122559

Hiroki Iwata, K. Umebayashi, Samuli Tiiro, Yasuo Suzuki, Janne J. Lehtomäki

{"title":"Optimum welch FFT segment size for duty cycle estimation in spectrum awareness system","authors":"Hiroki Iwata, K. Umebayashi, Samuli Tiiro, Yasuo Suzuki, Janne J. Lehtomäki","doi":"10.1109/WCNCW.2015.7122559","DOIUrl":"https://doi.org/10.1109/WCNCW.2015.7122559","url":null,"abstract":"In order to realize practical dynamic spectrum access (DSA), implementing spectrum sensing with reasonably low cost is very challenging due to the required detection accuracy and quickness. For this issue, we have introduced an extended DSA, smart spectrum access (SSA), where any useful information in terms of spectrum utilization, such as statistics regarding spectrum utilization, is used not only for accomplishing the requirements of spectrum sensing but also for enhancing the performance of the DSA. In this approach, obtaining the statistics of the spectrum utilization is an important issue for which we have developed a spectrum awareness system prototype. One issue in the spectrum awareness is the Welch FFT segment size design which is used for spectrum analysis. This issue involves a trade-off between the spectrum usage detection accuracy and available frequency resolution. For this issue, we derive an optimum segment size based on analysis and show that the optimum segment size depends on signal-to-measurement bandwidth ratio and duty cycle. The optimum segment size derived by the analysis is validated with numerical simulation and experimental results.","PeriodicalId":123586,"journal":{"name":"2015 IEEE Wireless Communications and Networking Conference Workshops (WCNCW)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126585069","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

A selfishness-aware coexistence scheme for 802.22 and 802.11af networks 一种适用于802.22和802.11af网络的自私意识共存方案

2015 IEEE Wireless Communications and Networking Conference Workshops (WCNCW) Pub Date : 2015-03-09 DOI: 10.1109/WCNCW.2015.7122553

Shuai Yuan, Leiyuan Li, Chunxiao Chigan

引用次数: 7

Inter-cell interference coordination by horizontal beamforming for small cells in 3D cell structure 三维小区结构中小小区水平波束形成的小区间干扰协调

2015 IEEE Wireless Communications and Networking Conference Workshops (WCNCW) Pub Date : 2015-03-09 DOI: 10.1109/WCNCW.2015.7122582

Kenji Hoshino, Sho Nabatame, A. Nagate, T. Fujii

引用次数: 2

A new inter-cell selection strategy for reducing ping-pong effect 一种新的减少乒乓效应的细胞间选择策略

2015 IEEE Wireless Communications and Networking Conference Workshops (WCNCW) Pub Date : 2015-03-09 DOI: 10.1109/WCNCW.2015.7122524

S. Hamouda, I. Chaabane, S. Tabbane

引用次数: 2

Cognitive-engined spectrum-fragmented synchronous MC-CDMA based on generalized hadamard codes 基于广义标准码的认知引擎频谱碎片同步MC-CDMA

2015 IEEE Wireless Communications and Networking Conference Workshops (WCNCW) Pub Date : 2015-03-09 DOI: 10.1109/WCNCW.2015.7122547

M. Shoreh, M. J. Khojasteh, Omid Poursaeed, J. Salehi

引用次数: 0