2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications最新文献_第6页

Application of cyclic delay transmit diversity to uplink 2-dimensional block spread CDMA with frequency-domain equalization 循环延迟传输分集在上行二维块扩展频域均衡CDMA中的应用

2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2009-09-01 DOI: 10.1109/PIMRC.2009.5449845

Qiyue Yu, W. Meng, Bo Liu, F. Adachi

引用次数: 4

Autonomous infrastructure based multihop cellular networks 基于多跳蜂窝网络的自治基础设施

2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2009-09-01 DOI: 10.1109/PIMRC.2009.5450070

M. DeFaria, E. Sousa

{"title":"Autonomous infrastructure based multihop cellular networks","authors":"M. DeFaria, E. Sousa","doi":"10.1109/PIMRC.2009.5450070","DOIUrl":"https://doi.org/10.1109/PIMRC.2009.5450070","url":null,"abstract":"In a multihop cellular network, the physical layer of mobile terminals is modified so that in addition to being able to transmit to base stations, mobile terminals are also able to transmit directly to other mobile terminals. This allows mobile terminals to lower their maximum transmission power and use other terminals to relay their traffic towards the base station. However, there is still a large amount of interference surrounding the base station because all traffic either emanates or is destined to the base station making it the capacity bottleneck of the network. In order to reduce the interference surrounding the base station, we propose a novel architecture called the autonomous infrastructure multihop cellular network. In this architecture, certain mobile terminals that have a connection to the backbone network will be allowed to act as access points. Access points will receive traffic from other terminals and send it directly onto the backbone network, as would a base station. This will reduce the amount of traffic required to be handled by the base station and increase network capacity. The results of our analysis and simulations show that when mobile terminals can act as access points, the SINR at the base station is higher, the power consumption is lower and the coverage is better than in a normal multihop cellular network.","PeriodicalId":110448,"journal":{"name":"2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116012111","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

Multi site MIMO channel analysis at 4.85GHz in outdoor environment 4.85GHz室外多站点MIMO信道分析

2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2009-09-01 DOI: 10.1109/PIMRC.2009.5450214

T. Murakami, N. Honma, K. Nishimori, R. Kudo, Y. Takatori, M. Mizoguchi

{"title":"Multi site MIMO channel analysis at 4.85GHz in outdoor environment","authors":"T. Murakami, N. Honma, K. Nishimori, R. Kudo, Y. Takatori, M. Mizoguchi","doi":"10.1109/PIMRC.2009.5450214","DOIUrl":"https://doi.org/10.1109/PIMRC.2009.5450214","url":null,"abstract":"Multiple-Input Multiple-Output (MIMO) system has been actively investigated to enhance wireless data transmission in outdoor environments. Micro/Macro-cell services such as WLAN/WiMAX have been much attention because they achieve a high throughput. Since proliferation of these services are expected, base stations (BSs) need to be located at various heights and locations in outdoor environments. Although many publications have reported measurements of the channel state information (CSI) in outdoor environments, the relationship between the BS heights or locations and the transmission performance in MIMO systems has not yet been fully investigated. Moreover, when the number of BSs increases per area, inter-cell interference problem occurs. Such an interference deteriorates the communication quality. In this paper, the experiment is conducted in urban area, in Japan, and the CSI was obtained using 4×4 MIMO-OFDM signals. We present signal to noise ratio (SNR), channel capacity and eigenvalues in MIMO channels, when the BS heights and locations are changed. We clarify that eigenvalues are one of important parameters for not only the channel capacity in MIMO channels but also inter-cell interference by the analysis using the measured MIMO channels.","PeriodicalId":110448,"journal":{"name":"2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"246 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116143055","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

Random access transmit power control algorithm of LTE system in relay network 中继网络中LTE系统随机接入发射功率控制算法

2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2009-09-01 DOI: 10.1109/PIMRC.2009.5449895

D. Lee, H. Morikawa

引用次数: 2

Dirty Paper Coding with phase reshaping: New integration scheme for broadcast and unicast 带相位重构的脏纸编码:广播和单播集成新方案

2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2009-09-01 DOI: 10.1109/PIMRC.2009.5449811

H. Chao, Yu Chen, Zhongji Hu

引用次数: 2

Effects of different churn models on the performance of structured peer-to-peer networks 不同流失模型对结构化点对点网络性能的影响

2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2009-09-01 DOI: 10.1109/PIMRC.2009.5450134

Zhonghong Ou, E. Harjula, M. Ylianttila

引用次数: 21

Partial transmit sequence-active interference cancellation for UWB OFDM transmission UWB OFDM传输的部分发射序列主动干扰消除

2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2009-09-01 DOI: 10.1109/PIMRC.2009.5450339

P. Tarasak, Zhiwei Lin, Xiaoming Peng, F. Chin

引用次数: 3

A new performance bound for non-orthogonal space-time spreading CDMA systems over MIMO Rayleigh fading channels MIMO瑞利衰落信道下非正交空时扩频CDMA系统的新性能界

2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2009-09-01 DOI: 10.1109/PIMRC.2009.5450246

Dianjun Chen, L. Yue, T. Hashimoto

引用次数: 2

A new opportunistic MAC layer protocol for cognitive IEEE 802.11-based wireless networks 一种新的基于认知IEEE 802.11无线网络的机会MAC层协议

2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2009-09-01 DOI: 10.1109/PIMRC.2009.5449990

A. Benslimane, Arshad Ali, A. Kobbane, T. Taleb

引用次数: 20

Joint cooperative diversity and scheduling with distributed transmit beamforming in OFDMA relay system OFDMA中继系统中分布式发射波束形成的联合合作分集与调度

2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2009-09-01 DOI: 10.1109/PIMRC.2009.5450356

S. Fares, F. Adachi, E. Kudoh

{"title":"Joint cooperative diversity and scheduling with distributed transmit beamforming in OFDMA relay system","authors":"S. Fares, F. Adachi, E. Kudoh","doi":"10.1109/PIMRC.2009.5450356","DOIUrl":"https://doi.org/10.1109/PIMRC.2009.5450356","url":null,"abstract":"Cooperative relay diversity and adaptive scheduling for active source/destination pairs in OFDMA-based relay network can significantly improve the reliability of data transmission over wireless fading channels as well as enhance the aggregate and per-link throughputs. However, in slow-varying fading channel, this technique suffers from low per-link throughput since some users with highest SNR at the destination access the channel for a long period while others will have to wait until their channel condition improves. In this paper we propose joint transmit beamforming and fixed cyclic delay diversity (CDD) at the relay nodes to enhance the transmit signals from relays to the destination link and to improve the perlink throughput performance. Combining transmit beamforming with CDD approach creates more fluctuation among subcarriers resulting in time-varying SNR at each destination. Therefore, the scheduler can now successfully provide more chance to users to have access to the channel by allocating subcarriers to users whose SNR are highest and thus the per-link throughput is enhanced. Simulation results show that the system performance using the proposed method increases significantly compared with the other previously proposed cooperative diversity techniques.","PeriodicalId":110448,"journal":{"name":"2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129159226","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