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2004 IEEE 15th International Symposium on Personal, Indoor and Mobile Radio Communications (IEEE Cat. No.04TH8754)最新文献

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Dynamic partitioning based call admission control for integrated services wireless mobile networks 基于动态分区的综合业务无线移动网络呼叫接纳控制
2004 IEEE 15th International Symposium on Personal, Indoor and Mobile Radio Communications (IEEE Cat. No.04TH8754) Pub Date : 2004-09-05 DOI: 10.1109/PIMRC.2004.1368751
N. O. Mohamed, D. Deniz
{"title":"Dynamic partitioning based call admission control for integrated services wireless mobile networks","authors":"N. O. Mohamed, D. Deniz","doi":"10.1109/PIMRC.2004.1368751","DOIUrl":"https://doi.org/10.1109/PIMRC.2004.1368751","url":null,"abstract":"Call admission control for multimedia wireless networks providing integrated services is considered. Performance evaluation of the reserve channels CAC strategy with dynamic partitioning for a wireless cell serving three customer classes is carried out. Each customer class has different bandwidth and channel holding time requirements which correspond to voice, data and video respectively. The wireless cell serves newly arriving as well as customers handed over from nearby cells. A number of channels are dynamically reserved for the sole use of handoff customers to reduce the probability of handoff call dropping. A solution technique is developed and the performance of the system is obtained. It is found that new and handoff customers which require more channels for their service are blocked more. Also, server utilization is much improved when the arrival rate of higher bandwidth requiring customers is high.","PeriodicalId":201962,"journal":{"name":"2004 IEEE 15th International Symposium on Personal, Indoor and Mobile Radio Communications (IEEE Cat. No.04TH8754)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128988546","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 reduced-complexity soft-input soft-output detection scheme for wideband MIMO channels 一种用于宽带MIMO信道的低复杂度软输入软输出检测方案
2004 IEEE 15th International Symposium on Personal, Indoor and Mobile Radio Communications (IEEE Cat. No.04TH8754) Pub Date : 2004-09-05 DOI: 10.1109/PIMRC.2004.1373812
Yvo L. C. de Jong, T. Willink
{"title":"A reduced-complexity soft-input soft-output detection scheme for wideband MIMO channels","authors":"Yvo L. C. de Jong, T. Willink","doi":"10.1109/PIMRC.2004.1373812","DOIUrl":"https://doi.org/10.1109/PIMRC.2004.1373812","url":null,"abstract":"This work presents a reduced-complexity soft-input soft-output detection scheme for wideband space-time bit-interleaved coded modulation (ST-BICM) MIMO systems. This scheme, which is referred to as iterative trellis search detection, is based in part on a reduced-complexity variant of the BCJR algorithm. It also uses signal sets with block partitioning labeling, called multilevel mapping constellations, in order to achieve further complexity reduction for higher-order QAM modulation formats. Results from computer simulations of an iterative (\"turbo\") MlMO receiver employing the new scheme have shown that it successfully eliminates the error floor that occurs if inter-symbol interference is not mitigated. It is also shown that the optimum choice of the number of fingers employed by the detector is not only dependent on the channel characteristics, but also by the fraction of states considered in the trellis search.","PeriodicalId":201962,"journal":{"name":"2004 IEEE 15th International Symposium on Personal, Indoor and Mobile Radio Communications (IEEE Cat. No.04TH8754)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129426036","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
Adaptive transform scheme to reduce PAR of an OFDM signal 降低OFDM信号PAR的自适应变换方案
2004 IEEE 15th International Symposium on Personal, Indoor and Mobile Radio Communications (IEEE Cat. No.04TH8754) Pub Date : 2004-09-05 DOI: 10.1109/PIMRC.2004.1368294
K. Sathananthan, C. Athaudage
{"title":"Adaptive transform scheme to reduce PAR of an OFDM signal","authors":"K. Sathananthan, C. Athaudage","doi":"10.1109/PIMRC.2004.1368294","DOIUrl":"https://doi.org/10.1109/PIMRC.2004.1368294","url":null,"abstract":"One major drawback in orthogonal frequency division multiplexing (OFDM) system is its high peak-to-average power ratio (PAR). Most of the PAR reduction techniques are based on changing the signal constellation symbols in a frame before evaluating the inverse discrete Fourier transformation (IDFT). A simple way to achieve this change is to use a linear transformation in the form of orthogonal matrix. Hadamard transform of data symbols has recently been proposed to reduced PAR. Motivated by this approach, we investigate the use of Fourier and cosine transforms to reduce the PAR. We also propose an adaptive transform scheme to further reduce the PAR with minimized complexity. This approach reduces the PAR by 4 dB for an OFDM signal with 128 subcarriers. We also compare the performance and the complexity of the proposed scheme with the selected mapping (SLM) technique.","PeriodicalId":201962,"journal":{"name":"2004 IEEE 15th International Symposium on Personal, Indoor and Mobile Radio Communications (IEEE Cat. No.04TH8754)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129912701","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
Stage-by-stage detection of distributed space-time block encoded relaying networks 分布式空时分组编码中继网络的逐级检测
2004 IEEE 15th International Symposium on Personal, Indoor and Mobile Radio Communications (IEEE Cat. No.04TH8754) Pub Date : 2004-09-05 DOI: 10.1109/PIMRC.2004.1368851
M. Dohler, H. Aghvami, Yonghui Li, B. Vucetic
{"title":"Stage-by-stage detection of distributed space-time block encoded relaying networks","authors":"M. Dohler, H. Aghvami, Yonghui Li, B. Vucetic","doi":"10.1109/PIMRC.2004.1368851","DOIUrl":"https://doi.org/10.1109/PIMRC.2004.1368851","url":null,"abstract":"Distributed multi-hop communication systems have been introduced recently which allow the application of multiple-input-multiple-output (MIMO) capacity enhancement techniques over spatially separated relaying mobile terminals. They were shown to yield significant capacity gains over direct communication or non-distributed single-input-single-output (SlSO) relaying networks. The contribution of This work is the derivation of throughput-maximising resource allocation strategies in terms of fractional frame duration and transmission power. It is assumed that distributed terminals cooperate at each relaying stage and that the detection of packets is performed at each relaying stage.","PeriodicalId":201962,"journal":{"name":"2004 IEEE 15th International Symposium on Personal, Indoor and Mobile Radio Communications (IEEE Cat. No.04TH8754)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129913337","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
Easishop: delivering cross merchant product comparison shopping for the mobile user 易店:为移动用户提供跨商家产品比较购物
2004 IEEE 15th International Symposium on Personal, Indoor and Mobile Radio Communications (IEEE Cat. No.04TH8754) Pub Date : 2004-09-05 DOI: 10.1109/PIMRC.2004.1368321
S. Keegan, Gregory M. P. O'Hare
{"title":"Easishop: delivering cross merchant product comparison shopping for the mobile user","authors":"S. Keegan, Gregory M. P. O'Hare","doi":"10.1109/PIMRC.2004.1368321","DOIUrl":"https://doi.org/10.1109/PIMRC.2004.1368321","url":null,"abstract":"The potential of a mobile personalised automated shopping protocol holds allure for end-user and commercial protagonist alike. The shopper is alleviated from the shopping task, in the process redressing a prevalent ailment of modern life- the 'cash rich, time poor imbalance'. This paper reports on recent efforts in autonomous mobile agent mediated retailing and considers how best to catalyse the development of a ubiquitous and semiautonomous macro economy. We develop upon previous work with our functional system, Easishop, a FIPA-compliant mobile agent based cross merchant product comparison shopping infrastructure.","PeriodicalId":201962,"journal":{"name":"2004 IEEE 15th International Symposium on Personal, Indoor and Mobile Radio Communications (IEEE Cat. No.04TH8754)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130369591","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 novel rate-adaptation algorithm for multiple access OFDM systems 一种新的多址OFDM系统速率自适应算法
2004 IEEE 15th International Symposium on Personal, Indoor and Mobile Radio Communications (IEEE Cat. No.04TH8754) Pub Date : 2004-09-05 DOI: 10.1109/PIMRC.2004.1368772
Ehsan Bakhtiari, B. Khalaj
{"title":"A novel rate-adaptation algorithm for multiple access OFDM systems","authors":"Ehsan Bakhtiari, B. Khalaj","doi":"10.1109/PIMRC.2004.1368772","DOIUrl":"https://doi.org/10.1109/PIMRC.2004.1368772","url":null,"abstract":"In this paper, a new scheme for adaptive subcarrier, bit and power allocation for downlink transmission of multiuser orthogonal frequency division multiplexing (OFDM) systems is presented. An adaptive algorithm is introduced to maximize the total data rate in a frequency selective channel, while satisfying the requirements on total transmit power, minimum data rate of each user, and desired BER that offer various quality of service (QoS) levels for different users. The performance and complexity of the proposed scheme is also compared with similar methods and other OFDM-based multiple access methods. Simulation results show that the proposed algorithm leads to higher performance in comparison with earlier sub-optimum methods, and yet requiring an acceptable computational complexity level.","PeriodicalId":201962,"journal":{"name":"2004 IEEE 15th International Symposium on Personal, Indoor and Mobile Radio Communications (IEEE Cat. No.04TH8754)","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126984063","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
Influence of transmission power control on the transport capacity of wireless multihop networks 传输功率控制对无线多跳网络传输容量的影响
2004 IEEE 15th International Symposium on Personal, Indoor and Mobile Radio Communications (IEEE Cat. No.04TH8754) Pub Date : 2004-09-05 DOI: 10.1109/PIMRC.2004.1373852
M. Gerharz, Christian de Waal, M. Frank, P. Martini
{"title":"Influence of transmission power control on the transport capacity of wireless multihop networks","authors":"M. Gerharz, Christian de Waal, M. Frank, P. Martini","doi":"10.1109/PIMRC.2004.1373852","DOIUrl":"https://doi.org/10.1109/PIMRC.2004.1373852","url":null,"abstract":"We examine the general influence of transmission power control on a wireless multi-hop network's throughput and compare topologies resulting from different transmission power control strategies. For this purpose, we introduce concepts for measuring certain characteristics of wireless multihop network topologies.","PeriodicalId":201962,"journal":{"name":"2004 IEEE 15th International Symposium on Personal, Indoor and Mobile Radio Communications (IEEE Cat. No.04TH8754)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129078781","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
System level performance of OFDMA forward link with proportional fair scheduling 比例公平调度OFDMA转发链路的系统级性能
2004 IEEE 15th International Symposium on Personal, Indoor and Mobile Radio Communications (IEEE Cat. No.04TH8754) Pub Date : 2004-09-05 DOI: 10.1109/PIMRC.2004.1373925
Seokhyun Yoon, Youngkwon Cho, C. Chae, Hyunwoo Lee
{"title":"System level performance of OFDMA forward link with proportional fair scheduling","authors":"Seokhyun Yoon, Youngkwon Cho, C. Chae, Hyunwoo Lee","doi":"10.1109/PIMRC.2004.1373925","DOIUrl":"https://doi.org/10.1109/PIMRC.2004.1373925","url":null,"abstract":"System level performance of OFDM/ OFDMA is evaluated for various system parameters, such as frequency reuse factor, scheduling algorithm and sub-channel structures. Specifically, the generalized two step sub-channel/power allocation algorithm, with either aggregated or distributed sub-channel structure, is first extended to provide proportional fairness. Then, by simulation, the sector throughput is evaluated in practical OFDMA based cellular system environment with frequency reuse of 1 and 3, respectively.","PeriodicalId":201962,"journal":{"name":"2004 IEEE 15th International Symposium on Personal, Indoor and Mobile Radio Communications (IEEE Cat. No.04TH8754)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130570334","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: 27
Perceptual quality adaptation (PQA) algorithm for 3GP and multitracked MPEG-4 content over wireless IP networks 无线IP网络3GP和多轨MPEG-4内容的感知质量自适应(PQA)算法
2004 IEEE 15th International Symposium on Personal, Indoor and Mobile Radio Communications (IEEE Cat. No.04TH8754) Pub Date : 2004-09-05 DOI: 10.1109/PIMRC.2004.1368370
N. Cranley, L. Murphy, Philip Perry
{"title":"Perceptual quality adaptation (PQA) algorithm for 3GP and multitracked MPEG-4 content over wireless IP networks","authors":"N. Cranley, L. Murphy, Philip Perry","doi":"10.1109/PIMRC.2004.1368370","DOIUrl":"https://doi.org/10.1109/PIMRC.2004.1368370","url":null,"abstract":"Many adaptive delivery mechanisms have been devised for streaming multimedia over best-effort IP networks, such as the Internet. Most of these adaptive schemes do not consider the user's perception of quality when making adaptations. We describe a perceptual quality adaptation algorithm (PQA) and prototype system architecture that uses knowledge of user perceived quality to make adaptation decisions using an optimum adaptation trajectory. This optimum adaptation trajectory indicates how encoding quality should be adapted (upgraded/downgraded) with respect to user perceived quality in response to rapidly fluctuating network conditions. We present simulation results that demonstrate the behavior of a perceptual quality adaptation algorithm.","PeriodicalId":201962,"journal":{"name":"2004 IEEE 15th International Symposium on Personal, Indoor and Mobile Radio Communications (IEEE Cat. No.04TH8754)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124202711","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
Variable packet size adaptive modulation SR-ARQ scheme for Rayleigh fading channels 瑞利衰落信道的变包大小自适应调制SR-ARQ方案
2004 IEEE 15th International Symposium on Personal, Indoor and Mobile Radio Communications (IEEE Cat. No.04TH8754) Pub Date : 2004-09-05 DOI: 10.1109/PIMRC.2004.1373904
Wu Junli, Hou Xiaolin, Yin Chang-chuan, Yue Guangxin
{"title":"Variable packet size adaptive modulation SR-ARQ scheme for Rayleigh fading channels","authors":"Wu Junli, Hou Xiaolin, Yin Chang-chuan, Yue Guangxin","doi":"10.1109/PIMRC.2004.1373904","DOIUrl":"https://doi.org/10.1109/PIMRC.2004.1373904","url":null,"abstract":"Conventional automatic repeat request (ARQ) schemes perform poorly in wireless fading channels. In this paper, variable packet size adaptive modulation (AM) ARQ scheme is proposed. The performance of discrete packet size AM selective repeat (SR) ARQ schemes for Rayleigh fading channels is analyzed and simple analytical expressions of its throughput are presented. The optimum switching thresholds that maximize the throughput are found. Theoretic analysis and numerical results indicate that a small number of packet sizes per modulation mode can get good performance in fading channels.","PeriodicalId":201962,"journal":{"name":"2004 IEEE 15th International Symposium on Personal, Indoor and Mobile Radio Communications (IEEE Cat. No.04TH8754)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121320031","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
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