2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications最新文献_第9页

Characterization of the wideband wireless channel in the context of DVB systems DVB系统中宽带无线信道的特性

2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2008-12-08 DOI: 10.1109/PIMRC.2008.4699766

Y. Corre, Y. Lostanlen

引用次数: 11

Interference mitigation for MIMO systems employing user-specific, linear precoding 采用用户特定的线性预编码的MIMO系统的干扰缓解

2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2008-12-08 DOI: 10.1109/PIMRC.2008.4699630

A. Osseiran, K. Zangi, D. Hui, L. Krasny

{"title":"Interference mitigation for MIMO systems employing user-specific, linear precoding","authors":"A. Osseiran, K. Zangi, D. Hui, L. Krasny","doi":"10.1109/PIMRC.2008.4699630","DOIUrl":"https://doi.org/10.1109/PIMRC.2008.4699630","url":null,"abstract":"User-specific, linear precoding is used extensively by almost all existing and emerging wireless MIMO standards [1], [2], [3], [4]. With user-specific, linear precoding, the data symbols to be transmitted to each user are passed through a linear transformation before being sent to the transmit antennas, and a different precoder is used for each user depending on his/her channel. For example, with 4 transmit antennas at the BS, 2 receive antennas at the mobile, and instant channel quality indicator (CQI), the cell capacity of a 4times2 2-clustered system with user-specific, linear precoding is more than 80% higher than the cell capacity of a system with one transmit antenna [10]. But such schemes are vulnerable to delayed CQI due to fast variations of interference, leading in some cases to performance that is worse than a SISO system. In this paper, we will present a method that mitigates the degradation due to fast-varying interference in MIMO systems that use linear precoding. We will show that the temporal variation of other-cell interference is almost eliminated with this method. Our results indicate that for a 4times2 2-Clustered transmit array with the proposed method, the performance loss due to delayed CQI is reduced from 35% to 5%.","PeriodicalId":125554,"journal":{"name":"2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128996037","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: 4

Distributed scheduling with end-to-end compensation in multihop ad hoc networks 多跳自组网中具有端到端补偿的分布式调度

2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2008-12-08 DOI: 10.1109/PIMRC.2008.4699580

Yijiang Sun, V. Li, Ka-Cheong Leung

{"title":"Distributed scheduling with end-to-end compensation in multihop ad hoc networks","authors":"Yijiang Sun, V. Li, Ka-Cheong Leung","doi":"10.1109/PIMRC.2008.4699580","DOIUrl":"https://doi.org/10.1109/PIMRC.2008.4699580","url":null,"abstract":"In this paper, we investigate the problem of providing QoS to end-to-end flows in multihop ad hoc networks with channel errors through packet scheduling. Each flow is associated with some QoS requirement, which is requested and granted in the form of a desired service rate. The achieved rate is estimated at the destination and fed back to the source periodically. Both the desired rate and achieved rate of a multihop flow are piggybacked on the packets of the flow and propagated from the source node to all its downstream relaying nodes. With such information, a compensation-capable scheduling algorithm originally designed for infrastructured wireless networks can be adapted to each ad hoc node for compensating a lagging flow, i.e., a flow with the achieved rate smaller than the desired rate. We propose the feedback and propagation mechanism as an end-to-end compensation framework, which is the key contribution of this work. We use BGFS-EBA, a scheduling algorithm for infrastructured wireless networks, as an example to demonstrate how such an algorithm is adapted to ad hoc networks within the proposed framework. Our simulation results show that the proposed mechanism maintains outcome fairness and compensate flows that suffer sporadic bursty channel errors effectively.","PeriodicalId":125554,"journal":{"name":"2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125347762","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: 0

Accuracy enhancement of an indoor ANN-based fingerprinting location system using Kalman filtering 利用卡尔曼滤波提高室内人工神经网络指纹定位系统的精度

2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2008-12-08 DOI: 10.1109/PIMRC.2008.4699398

Salim Outemzabet, C. Nerguizian

{"title":"Accuracy enhancement of an indoor ANN-based fingerprinting location system using Kalman filtering","authors":"Salim Outemzabet, C. Nerguizian","doi":"10.1109/PIMRC.2008.4699398","DOIUrl":"https://doi.org/10.1109/PIMRC.2008.4699398","url":null,"abstract":"This paper presents an accuracy enhancement solution to mobilepsilas location and tracking systems in indoor wireless local area network (WLAN) environments. The enhancement method consists of the Kalman filtering application to an artificial neural network (ANN) based fingerprinting location technique. The application of Kalman filtering has the advantage of using information about the mobilepsilas motion to reduce location errors (caused by the WLAN received signal strength- RSS variations) and to avoid trajectory discontinuities (caused by the static estimation of the ANN-based fingerprinting technique). To process the RSS-based fingeprinting location technique, two ANN-based pattern-matching algorithms have been examined: the generalized regression neural network (GRNN) and the multi-layer perceptron (MLP) and they have been compared to the classic K-nearest neighbors (KNN) method. Experimental results, conducted in a specific in-building environment, showed that the GRNN algorithm performs better than the MLP and KNN algorithms. The application of Kalman filtering to the considered GRNN-based fingerprinting location technique improved the location accuracy of about 22.4 % in terms of location mean error.","PeriodicalId":125554,"journal":{"name":"2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126661388","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: 30

MIMO technologies for the wireless future 未来无线的MIMO技术

2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2008-12-08 DOI: 10.1109/PIMRC.2008.4699969

G. Bauch, A. Alexiou

引用次数: 28

A sequential test based cooperative spectrum sensing scheme for cognitive radios 一种基于顺序测试的认知无线电协同频谱感知方案

2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2008-12-08 DOI: 10.1109/PIMRC.2008.4699574

Y. Shei, Y. Su

引用次数: 51

A differential coding algorithm for wireless sensor networks 一种无线传感器网络差分编码算法

2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2008-12-08 DOI: 10.1109/PIMRC.2008.4699812

Juliana F. S. Aquino, E. Nakamura, A. Loureiro, M. Endler

引用次数: 2

Channel estimation with interference cancellation for a MIMO receiver using iterative equalization and decoding 使用迭代均衡和解码的MIMO接收机干扰消除信道估计

2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2008-12-08 DOI: 10.1109/PIMRC.2008.4699437

M. Higashinaka, H. Kubo, A. Okazaki

{"title":"Channel estimation with interference cancellation for a MIMO receiver using iterative equalization and decoding","authors":"M. Higashinaka, H. Kubo, A. Okazaki","doi":"10.1109/PIMRC.2008.4699437","DOIUrl":"https://doi.org/10.1109/PIMRC.2008.4699437","url":null,"abstract":"This paper proposes a novel channel estimation method for iterative equalization in MIMO systems. The proposed method incorporates co-channel interference (CCI) cancellation in the channel estimator and the channel estimation is successively performed with respect to each stream. Accuracy of channel estimation holds the key to be successfully converged the iterative equalization and decoding process. Although the channel estimates can be re-estimated by means of LS (Least Square) channel estimation using tentative decisions obtained in the iterative process, its performance is severely limited in a MIMO system because of erroneous decisions and ill-conditioned channel estimation matrix. The proposed method can suppress the above effects by means of CCI cancellation and successive channel estimation. Computer simulation confirms that the proposed channel estimation method can accurately estimate the channel, and the receiver with iterative equalization and the proposed method achieves excellent decoding performance in a MIMO-SM (Spatial Multiplexing) system.","PeriodicalId":125554,"journal":{"name":"2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123042098","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 transport and radio load balancing strategies for BS assignment in mobile access networks 移动接入网络中BS分配的传输和无线电负载均衡策略的性能分析

2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2008-12-08 DOI: 10.1109/PIMRC.2008.4699801

Francisco Novillo, Hiram Galeana-Zapién, Anna Lainz, R. Ferrús, J. Olmos

{"title":"Performance analysis of transport and radio load balancing strategies for BS assignment in mobile access networks","authors":"Francisco Novillo, Hiram Galeana-Zapién, Anna Lainz, R. Ferrús, J. Olmos","doi":"10.1109/PIMRC.2008.4699801","DOIUrl":"https://doi.org/10.1109/PIMRC.2008.4699801","url":null,"abstract":"In mobile access networks, base station (BS) assignment mechanisms are mainly driven by radio conditions since it is generally assumed that the limiting factor is the air interface. This assumption has been proven to be very reasonable when circuit voice was the dominant service and backhaul capacity provisioning accounting for the peak rate at the BSs was an economically feasible option. However, as more efficient air interface technologies are introduced along with higher data rate services, a growing concern is that the transport part of the mobile network can also represent a bottleneck. In this paper we analyze a BS assignment strategy that simultaneously exploits load balancing in both the radio interface and the transport backhaul links. The BS assignment problem is solved by means of simulated annealing heuristics under different deployment scenarios comprising partially-limited backhaul radio access networks (RANs) and the presence of traffic hotspots. Results achieved for the proposed BS assignment strategy are compared to those obtained by common strategies such as minimum path loss (MPL) and load balancing radio (LBR).","PeriodicalId":125554,"journal":{"name":"2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126362726","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

Feedback reduction schemes for MIMO broadcast channels MIMO广播信道的反馈减少方案

2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2008-12-08 DOI: 10.1109/PIMRC.2008.4699832

A. Razi, Jinhong Yuan

引用次数: 6