2009 IEEE Wireless Communications and Networking Conference最新文献_第9页

User Resource Structure Design with Enhanced Diversity for OFDMA in Time-Varying Channels 时变信道中增强分集的OFDMA用户资源结构设计

2009 IEEE Wireless Communications and Networking Conference Pub Date : 2009-04-05 DOI: 10.1109/WCNC.2009.4918014

H. Minn, Chia-Chin Chong

引用次数: 5

A TH-UWB Receiver with Near-MUD Performance for Multiple Access Interference Environments 多址干扰环境下具有近mud性能的TH-UWB接收机

2009 IEEE Wireless Communications and Networking Conference Pub Date : 2009-04-05 DOI: 10.1109/WCNC.2009.4917549

Iraj Hosseini, N. Beaulieu

{"title":"A TH-UWB Receiver with Near-MUD Performance for Multiple Access Interference Environments","authors":"Iraj Hosseini, N. Beaulieu","doi":"10.1109/WCNC.2009.4917549","DOIUrl":"https://doi.org/10.1109/WCNC.2009.4917549","url":null,"abstract":"The multiple access interference (MAI) in a time-hopping (TH) ultra-wideband (UWB) system is known to be non-Gaussian even when the system has a moderately large number of active users. Therefore, the conventional matched filter (CMF) receiver, the optimal structure for Gaussian noise which maximizes the signal-to-noise ratio (SNR) and minimizes the probability of detection error in the absence of non-Gaussian interference, is not necessarily optimal. We express and prove a stronger claim that even the outputs of the matched filters in the conventional UWB receiver can not provide a sufficient decision statistic for detecting the information bits transmitted by the desired user. Further, a novel TH-UWB receiver is introduced which uses a similar methodology to the optimal multiuser detection (MUD) algorithm for detecting the information bits. However, the complexity of this new receiver is much less than that of the optimal MUD algorithm. It employs only one matched filter instead of a bank of matched filters resulting in a simple and low-cost TH-UWB receiver. Simulation results show that the new receiver outperforms previous single-user TH-UWB receivers and achieves essentially the performance of the CMF receiver operating in a single-user system.","PeriodicalId":186150,"journal":{"name":"2009 IEEE Wireless Communications and Networking Conference","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126750464","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 Joint MLSD Receiver for Meteor Burst Communication 用于流星突发通信的联合MLSD接收机

2009 IEEE Wireless Communications and Networking Conference Pub Date : 2009-04-05 DOI: 10.1109/WCNC.2009.4917509

Zan Li, Jiangbo Si, Feng Lan, Xiaojun Chen

{"title":"A Joint MLSD Receiver for Meteor Burst Communication","authors":"Zan Li, Jiangbo Si, Feng Lan, Xiaojun Chen","doi":"10.1109/WCNC.2009.4917509","DOIUrl":"https://doi.org/10.1109/WCNC.2009.4917509","url":null,"abstract":"According to the characteristics of meteor burst channels, variable rate data transmission is often employed to improve the average system throughput, and the time-varying meteor channel in the presence of multi-path rays brings difficulties in both data detection and channel estimation at the receiver. As we know, per-survivor processing (PSP) based on the joint data and channel estimation of maximum likelihood sequence detection (MLSD) is often considered to obtain the optimal detection performance for time-varying channels. However, the great computational complexity of PSP is the major problem in practice. In this paper we propose an adaptive state reduction of PSP (ASRP) algorithm with few states in the trellis diagram for exponential decay of meteor channels. Based on the estimation of the meteor channel parameters, the adaptive threshold is derived to select the states close to the right one in the trellis to reduce the complexity of PSP. Theoretical analysis and computer simulations results show that the ASRP we proposed provides suboptimal performance and makes good tradeoff between the performance and the computational complexity, so that the reliable data transmission can be realized for MBC systems with adaptive modulation and coding (AMC).","PeriodicalId":186150,"journal":{"name":"2009 IEEE Wireless Communications and Networking Conference","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121320663","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 Distributed Network Selection Scheme in Next Generation Heterogeneous Wireless Networks 下一代异构无线网络中的分布式网络选择方案

2009 IEEE Wireless Communications and Networking Conference Pub Date : 2009-04-05 DOI: 10.1109/WCNC.2009.4917499

Pengbo Si, F. Yu, Hong Ji, Victor C. M. Leung

引用次数: 4

Spatial Multi-User Pairing for Uplink Virtual-MIMO Systems with Linear Receiver 线性接收上行虚拟mimo系统的空间多用户配对

2009 IEEE Wireless Communications and Networking Conference Pub Date : 2009-04-05 DOI: 10.1109/WCNC.2009.4917973

B. Fan, Wenbo Wang, Yicheng Lin, Lin Huang, K. Zheng

引用次数: 25

Conversion of the Spatio-Temporal Correlation from Uplink to Downlink in FDD Systems FDD系统中从上行到下行的时空相关转换

2009 IEEE Wireless Communications and Networking Conference Pub Date : 2009-04-05 DOI: 10.1109/WCNC.2009.4917640

M. Jordan, Xitao Gong, G. Ascheid

引用次数: 14

Performance Comparison of Feasible MMSE-PIC Algorithms with Channel Estimation for HSUPA HSUPA信道估计的可行MMSE-PIC算法性能比较

2009 IEEE Wireless Communications and Networking Conference Pub Date : 2009-04-05 DOI: 10.1109/WCNC.2009.4917893

Ilkka Moilanen, Paavo Hahtola

{"title":"Performance Comparison of Feasible MMSE-PIC Algorithms with Channel Estimation for HSUPA","authors":"Ilkka Moilanen, Paavo Hahtola","doi":"10.1109/WCNC.2009.4917893","DOIUrl":"https://doi.org/10.1109/WCNC.2009.4917893","url":null,"abstract":"In this paper, we study the speech user performance of selected parallel interference cancellation (PIC) algorithms in a single-cell high speed uplink packet access (HSUPA) system. To combat intersymbol interference (ISI), single-user chip-level minimum mean-squared error (MMSE) equalizer is used to detect the data users. PIC is applied to suppress the interference from data users to speech users, and RAKE to detect the speech users. As an input to the PIC stage, we may use the hard or soft symbol decisions (HD, SD) from the data users' demodulator or decoder outputs. The latter requires re-encoding of the decoded symbols. This adds to complexity, but increases also the reliability of the interference estimates. Results and analysis are provided for both ideal and MMSE channel estimation (CE). We show that the combination of PIC and RAKE outperforms the simple MMSE equalization in all studied cases. Using re-encoded soft symbol decisions for interference estimate calculation always leads to the best performance. However, in some scenarios the performance loss due to using the soft symbol decisions from the demodulator output is almost negligible.","PeriodicalId":186150,"journal":{"name":"2009 IEEE Wireless Communications and Networking Conference","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125718572","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

Resource Allocation Algorithms with Reduced Complexity in MIMO Multi-Hop Fading Channels 降低MIMO多跳衰落信道复杂度的资源分配算法

2009 IEEE Wireless Communications and Networking Conference Pub Date : 2009-04-05 DOI: 10.1109/WCNC.2009.4917945

Feng Li, H. Jafarkhani

引用次数: 11

Precoding of (Non) Orthogonal Space-Time Block Codes over Arbitrarily Correlated Rayleigh Channel 任意相关瑞利信道上(非)正交空时分组码的预编码

2009 IEEE Wireless Communications and Networking Conference Pub Date : 2009-04-05 DOI: 10.1109/WCNC.2009.4917917

M. Bhatnagar, A. Hjørungnes

引用次数: 5

Cooperative Network Localization Via Node Velocity Estimation 基于节点速度估计的协同网络定位

2009 IEEE Wireless Communications and Networking Conference Pub Date : 2009-04-05 DOI: 10.1109/WCNC.2009.4917646

Liang Dong

引用次数: 19