2009 European Wireless Conference最新文献_第5页

Performance of generalized Rake receiver with imperfect channel and interference estimates 不完全信道和干扰估计下广义Rake接收机的性能

2009 European Wireless Conference Pub Date : 2009-05-17 DOI: 10.1109/EW.2009.5357755

B. Lindoff

引用次数: 1

Performance evaluation of TDMA versus CSMA-based protocols in SINR models TDMA与基于csma的协议在SINR模型中的性能评估

2009 European Wireless Conference Pub Date : 2009-05-17 DOI: 10.1109/EW.2009.5358007

S. Banaouas, P. Muhlethaler

引用次数: 8

Evolutionary theory for cluster head election in cooperative clusters implementing network coding 实现网络编码的合作集群簇头选举的进化理论

2009 European Wireless Conference Pub Date : 2009-05-17 DOI: 10.1109/EW.2009.5357993

L. Militano, F. Fitzek, A. Iera, A. Molinaro

引用次数: 1

Conditions for the stability of wireless ARQ protocols and reliable communications 条件无线ARQ协议的稳定性和可靠的通信

2009 European Wireless Conference Pub Date : 2009-05-17 DOI: 10.1109/EW.2009.5357974

A. Giovanidis, S. Stańczak

引用次数: 0

Relaying in Long Term Evolution: Indoor full frequency reuse 继电器的长期发展:室内全频率复用

2009 European Wireless Conference Pub Date : 2009-05-17 DOI: 10.1109/EW.2009.5357758

V. Venkatkumar, T. Wirth, T. Haustein, E. Schulz

{"title":"Relaying in Long Term Evolution: Indoor full frequency reuse","authors":"V. Venkatkumar, T. Wirth, T. Haustein, E. Schulz","doi":"10.1109/EW.2009.5357758","DOIUrl":"https://doi.org/10.1109/EW.2009.5357758","url":null,"abstract":"Future cellular wireless networks could include multihop transmissions through relays. For LTE-Advanced networks multihop relaying is one of the candidate enabling techniques for coverage extension. In particular, relaying is envisioned for indoor coverage, such as in office and residential buildings. In this approach, a wireless relay is placed inside a building in order to reduce the building penetration path loss. A relay could perform analog signal amplification or decode and forward operation. Decode and forward operation is advantageous in the sense that a relay can employ full reuse of the bandwidth. The re-used bandwidth could also be used efficiently by independent link adaptation. This paper reports measurement results of state of art direct link and indoor decode and forward relaying in LTE downlink. Relaying has been implemented in a real-time test-bed with enabling transceiver techniques such as half-duplex interference suppression and IP packet forwarding. The relay test-bed reuses the full 20 MHz bandwidth with frequency dependent link adaptation. Field trial measurements are performed in a single cell single user indoor office scenario with one relay. Results show that indoor LTE relaying is capable of delivering high throughput above 60 Mbps, with a spectral efficiency of 3 bits/s/Hz. It also provides 16 Mbps to locations well inside the building which is seen to be more dramatic.","PeriodicalId":412079,"journal":{"name":"2009 European Wireless Conference","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133465734","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: 26

Threshold list subset detector for turbo MIMO systems turbo MIMO系统的阈值列表子集检测器

2009 European Wireless Conference Pub Date : 2009-05-17 DOI: 10.1109/EW.2009.5357985

Sairamesh Nammi

引用次数: 1

Dimensioning of the downlink in OFDMA cellular networks via an Erlang's loss model 基于Erlang损失模型的OFDMA蜂窝网络下行链路的维数分析

2009 European Wireless Conference Pub Date : 2009-05-17 DOI: 10.1109/EW.2009.5358006

B. Błaszczyszyn, M. Karray

{"title":"Dimensioning of the downlink in OFDMA cellular networks via an Erlang's loss model","authors":"B. Błaszczyszyn, M. Karray","doi":"10.1109/EW.2009.5358006","DOIUrl":"https://doi.org/10.1109/EW.2009.5358006","url":null,"abstract":"In this paper we propose the following approach to the dimensioning of the radio part of the downlink in OFDMA networks. First, we use information theory to characterize the bit-rate in the channel from a base station to its mobile. It depends on the power and bandwidth allocated to this mobile. Then, we describe the resource (power and bandwidth) allocation problem and characterise feasible configurations of bit-rates of all users. As the key element, we propose some particular sufficient condition (in a multi-Erlang form) for a given configuration of bit-rates to be feasible. Finally, we consider an Erlang's loss model, in which streaming arrivals whose admission would lead to the violation of this sufficient condition are blocked and lost. In this model, the blocking probabilities can be calculated using Kaufman-Roberts algorithm. We propose it to evaluate the minimal density of base stations assuring acceptable blocking probabilities for a streaming traffic of a given load per surface unit. We validate this approach by comparison of the blocking probabilities to these simulated in the similar model in which the admission control is based on the original feasibility property (instead of its sufficient condition). Our sufficient bit-rate feasibility condition can also be used to dimension the network with respect to the elastic traffic.","PeriodicalId":412079,"journal":{"name":"2009 European Wireless Conference","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122833629","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: 25

A robust cell search algorithm for 3GPP LTE 一种适用于3GPP LTE的稳健小区搜索算法

2009 European Wireless Conference Pub Date : 2009-05-17 DOI: 10.1109/EW.2009.5357995

B. Lindoff, T. Rydén, D. Astely

引用次数: 20

Performance analysis of Closed and Open loop MIMO in LTE LTE中闭环和开环MIMO的性能分析

2009 European Wireless Conference Pub Date : 2009-05-17 DOI: 10.1109/EW.2009.5358012

C. Ball, R. Mullner, J. Lienhart, H. Winkler

{"title":"Performance analysis of Closed and Open loop MIMO in LTE","authors":"C. Ball, R. Mullner, J. Lienhart, H. Winkler","doi":"10.1109/EW.2009.5358012","DOIUrl":"https://doi.org/10.1109/EW.2009.5358012","url":null,"abstract":"This paper provides a detailed performance comparison between closed loop (CL) and open loop (OL) MIMO schemes for the upcoming OFDM based mobile broadband radio access technology 3GPP UTRA LTE. Based on system level simulation results, key performance indicators like cell throughput, user throughput and MIMO utilization have been evaluated for different system load conditions assuming 2×2 MIMO in a regular hexagonal cell deployment and in a real network scenario. A realistic dynamic MIMO switch between diversity and spatial multiplexing has been assumed, which is based on configurable CQI as well as rank filtering and decision thresholds. 3GPP compliant measurement granularity as well as appropriate measurement errors have been applied to both CQI and closed loop PMI reports. Besides dynamic MIMO switching, both MIMO 2×2 diversity and MIMO 2×2 spatial multiplexing scenarios have been investigated for the downlink direction highlighting the differences of the various MIMO transmission modes and their impacts on spectral efficiency and radio performance. It has been shown that ideal closed loop MIMO provides a 2 dB theoretical performance gain over open loop MIMO. Assuming practical limitations such as available granularity, delay and realistic PMI measurement errors, however, this gain significantly decreases below roughly 1 dB. Nevertheless MIMO proves to be an appropriate method to boost user throughput especially at low to medium system load up to a factor of 2. Moreover the dynamic MIMO switch proves to be very robust against variations of parameter settings.","PeriodicalId":412079,"journal":{"name":"2009 European Wireless Conference","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123672355","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: 31

Increasing the VoIP capacity of WiMAX systems through persistent resource allocation 通过持久的资源分配增加WiMAX系统的VoIP容量

2009 European Wireless Conference Pub Date : 2009-05-17 DOI: 10.1109/EW.2009.5357982

Klaus Sambale, K. Klagges

引用次数: 3