2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications最新文献_第10页

Max-min beamforming for multicell downlink systems using long-term channel statistics 使用长期信道统计的多小区下行系统的最大最小波束形成

2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2009-09-01 DOI: 10.1109/PIMRC.2009.5449866

Xitao Gong, M. Jordan, Guido Dartmann, G. Ascheid

引用次数: 16

A network coded ARQ protocol for broadcast streaming over hybrid satellite systems 用于混合卫星系统上的广播流的网络编码ARQ协议

2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2009-09-01 DOI: 10.1109/PIMRC.2009.5449889

Sameh Sorour, S. Valaee

{"title":"A network coded ARQ protocol for broadcast streaming over hybrid satellite systems","authors":"Sameh Sorour, S. Valaee","doi":"10.1109/PIMRC.2009.5449889","DOIUrl":"https://doi.org/10.1109/PIMRC.2009.5449889","url":null,"abstract":"Due to the high round trip delay in satellite systems, the retransmission of lost packets using conventional ARQ schemes is performed in a very rigid manner and after a very long time of the initial packet transmission. This results in a high average packet delay and packet drop rate in broadcast streaming applications. Moreover, conventional ARQ schemes are generally inefficient in broadcast scenarios. In this paper, we propose a network coded ARQ protocol that performs both proactive and reactive packet retransmissions in hybrid satellite systems. The proposed protocol employs a network coding approach to generate efficient proactive retransmission packets without the knowledge of lost packets. This not only allows the transmission of these coded retransmissions before the arrival of the initial packets to their destinations but also achieves more efficient packet recovery compared to conventional ARQ. Reactive retransmissions in response to packet acknowledgments are then employed if one or more packets are still lost. Simulation results show considerable gains for our proposed protocol over the selective repeat ARQ protocol in terms of average packet delay, packet drop rate and goodput.","PeriodicalId":110448,"journal":{"name":"2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"1 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":"134521256","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

Non-cooperative game for power allocation in interfering wireless networks 干扰无线网络中功率分配的非合作博弈

2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2009-09-01 DOI: 10.1109/PIMRC.2009.5449791

W. P. Tam, T. Lok

引用次数: 0

Weighted phase averager for frequency estimation of a noisy single sinusoid: Application of the observation phase noise model 带噪单正弦波频率估计的加权相位平均器:观测相位噪声模型的应用

2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2009-09-01 DOI: 10.1109/PIMRC.2009.5450336

Hua Fu, P. Kam

引用次数: 2

Subcarrier SNR ML estimators and Cramér-Rao bounds in multicarrier transmission 多载波传输中的子载波信噪比ML估计和cram<s:1> - rao界

2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2009-09-01 DOI: 10.1109/PIMRC.2009.5449988

Jean-Guy Descure, F. Bellili, S. Affes

引用次数: 0

An improved PCP signaling detector with reduced implementation complexity 改进的PCP信令检测器，降低了实现的复杂性

2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2009-09-01 DOI: 10.1109/PIMRC.2009.5450064

M. J. Rahman, Xianbin Wang, Hsiao-Chun Wu, S. Park, H. Kim

{"title":"An improved PCP signaling detector with reduced implementation complexity","authors":"M. J. Rahman, Xianbin Wang, Hsiao-Chun Wu, S. Park, H. Kim","doi":"10.1109/PIMRC.2009.5450064","DOIUrl":"https://doi.org/10.1109/PIMRC.2009.5450064","url":null,"abstract":"An adaptive Orthogonal Frequency Division Multiplexing (OFDM) system, having precoded cyclic prefix (PCP) was proposed earlier as a way to carry the control signaling parameters to provide much needed flexible transmission techniques in cognitive radio (CR) communications [1]. The ultimate goal of the PCP-OFDM system is to achieve concurrent transmission of CR control signaling parameters with data information. Therefore, hardware and computational efficient demodulation of PCP is of huge importance to recover the signaling parameters and for the design of fair spectrum sharing mechanism in cognitive radio scenario. But due to the hardware and computational complexity of the conventional optimal matched filter [2], recently a demodulator was proposed in paper [3] which has reduced complexity than the conventional approach. However, the complexity is still high which is often very difficult to implement and also not cost-effective. In this paper, we propose a low complexity demodulator for the efficient demodulation of the signaling information carried by the PCPs. Design of this demodulator is presented and performance is evaluated through the simulations in different channel scenarios. Along with a peak combining technique, impact of the multipath impairment can be mitigated to a reasonable extent. More importantly, the hardware and computational complexity is reduced substantially compared with the other techniques proposed earlier. It is also found from the numerical simulation results that this demodulation scheme provides the same performance as the conventional optimal matched filter, with significantly reduced hardware and computational complexity, therefore reducing the overall complexity and cost of the PCP-OFDM receiver.","PeriodicalId":110448,"journal":{"name":"2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"74 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":"133622292","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: 2

MAC framework for Intermittently Connected Cognitive Radio networks 间歇连接认知无线电网络的MAC框架

2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2009-09-01 DOI: 10.1109/PIMRC.2009.5449739

T. Wysocki, A. Jamalipour

引用次数: 8

A novel algorithm for removing cycles in quasi-cyclic LDPC codes 拟循环LDPC码中去环的一种新算法

2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2009-09-01 DOI: 10.1109/PIMRC.2009.5450003

Keke Liu, Zesong Fei, Jingming Kuang, Xiangming Li

引用次数: 7

QRD-based antenna selection for maximum-likelihood MIMO detection 基于qrd的最大似然MIMO检测天线选择

2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2009-09-01 DOI: 10.1109/PIMRC.2009.5449775

Chun-Tao Lin, Wen-Rong Wu

{"title":"QRD-based antenna selection for maximum-likelihood MIMO detection","authors":"Chun-Tao Lin, Wen-Rong Wu","doi":"10.1109/PIMRC.2009.5449775","DOIUrl":"https://doi.org/10.1109/PIMRC.2009.5449775","url":null,"abstract":"Antenna selection is a simple but effective method to exploit the transmit diversity in multiple-input multiple-output (MIMO) wireless communications. For maximum-likelihood (ML) detectors, the criterion for the selection is to maximize the free distance of the MIMO system. Since the optimum selection is difficult to conduct, a lower bound of the free distance is typically used as the selection criterion instead. The singular-value-decomposition (SVD) based selection criterion is well known in the literature. In this paper, we propose a QR decomposition (QRD) based selection criterion for antenna selection with the ML detector. Using some matrix properties, we theoretically prove that the lower bound achieved with the QRD-based criterion is tighter than that with the SVD-based criterion. We also propose another QRD-based criterion that can further tighten the lower bound. The proposed algorithms can be directly applied to the receive, and joint transmit/receive antenna selection schemes. Simulations show that the performance of the proposed selection criteria can significantly outperform the SVD-based selection criterion.","PeriodicalId":110448,"journal":{"name":"2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"205 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":"131438627","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: 9

Genetic algorithm based adaptive resource allocation in OFDMA system for heterogeneous traffic 基于遗传算法的OFDMA系统异构业务自适应资源分配

2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2009-09-01 DOI: 10.1109/PIMRC.2009.5450014

Yinglei Teng, Yong Zhang, Mei Song, Yuewu Dong, Li Wang

引用次数: 6