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IEEE 6th Workshop on Signal Processing Advances in Wireless Communications, 2005.最新文献

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Signal processing challenges in the design of the HomePlug AV powerline standard to ensure co-existence with Homeplug 1.0.1 HomePlug AV电力线标准设计中的信号处理挑战，以确保与HomePlug 1.0.1共存
IEEE 6th Workshop on Signal Processing Advances in Wireless Communications, 2005. Pub Date : 2005-06-05 DOI: 10.1109/SPAWC.2005.1506290
B. Mashburn, H. Latchman, Tim VanderMey, Larry Yonge, K. Tripathi
{"title":"Signal processing challenges in the design of the HomePlug AV powerline standard to ensure co-existence with Homeplug 1.0.1","authors":"B. Mashburn, H. Latchman, Tim VanderMey, Larry Yonge, K. Tripathi","doi":"10.1109/SPAWC.2005.1506290","DOIUrl":"https://doi.org/10.1109/SPAWC.2005.1506290","url":null,"abstract":"The HomePlug 1.0.1 standard was released in 2000 by the HomePlug Powerline Alliance and is now in use worldwide in powerline communication products for in-home LANs and for broadband powerline (BPL) Internet access, providing typical aggregate TCP throughput of 5-7 Mbps. The HomePlug AV standard, expected to be released in mid 2005, will provide a tenfold improvement in average throughput over 1.0.1. While AV is optimized for multimedia audio-visual (AV) communication, it is important that AV devices coexist with those of 1.0.1. To achieve this, the preamble which begins all AV packets should be robustly detectable by both AV and 1.0.1 nodes. AV devices must also be capable of transmitting 1.0.1 compatible priority and control waveforms, which conform to each region's spectral mask. This paper describes the hurdles that needed to be scaled to generate the compliant waveforms for coexistence, using the AV structures.","PeriodicalId":273666,"journal":{"name":"IEEE 6th Workshop on Signal Processing Advances in Wireless Communications, 2005.","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116759433","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: 7
Maximum SNR prefiltering for MIMO systems MIMO系统的最大信噪比预滤波
IEEE 6th Workshop on Signal Processing Advances in Wireless Communications, 2005. Pub Date : 2005-06-05 DOI: 10.1109/SPAWC.2005.1505897
Abdulruuf Hufeez, R. Rnmkssh, Dennis Hui
{"title":"Maximum SNR prefiltering for MIMO systems","authors":"Abdulruuf Hufeez, R. Rnmkssh, Dennis Hui","doi":"10.1109/SPAWC.2005.1505897","DOIUrl":"https://doi.org/10.1109/SPAWC.2005.1505897","url":null,"abstract":"In this paper, we derive a class of FIR prefilters for MIMO systems that maximize the signal-to-noise ratio (SNR) defined as the sum of SNRs for the output branches with uncorrelated noise. This definition is motivated by an analysis of the pairwise error probability. The maximum-SNR (MSNR) class of prefilters includes decision feedback equalization (DFE) and channel shortening equalization (CSE) prefilters. The feedback taps are completely suppressed by the CSE prefilter and not suppressed at all by the DFE prefilter. The MSNR class includes hybrid prefilters which are a combination of CSE and DFE prefilters. Hybrid prefilters allow middle ground for suppressing feedback taps which is desirable for equalization using decision feedback sequence estimation (DFSE). We show simulation results for joint DFSE demodulation of two 8-PSK modulated cochannel EDGE users using a single antenna receiver. We find that a hybrid prefilter performs best for this example.","PeriodicalId":273666,"journal":{"name":"IEEE 6th Workshop on Signal Processing Advances in Wireless Communications, 2005.","volume":"4541 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125044622","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
Downlink SDMA for legacy IEEE 802.11a/g mobile stations: acknowledgement recovery and channel estimation 用于传统IEEE 802.11a/g移动站的下行链路SDMA:确认恢复和信道估计
IEEE 6th Workshop on Signal Processing Advances in Wireless Communications, 2005. Pub Date : 2005-06-05 DOI: 10.1109/SPAWC.2005.1505903
Alexundr M Kuzminskiy, Hamid Reza Karimi, Co~lstaatinos B Papadias
{"title":"Downlink SDMA for legacy IEEE 802.11a/g mobile stations: acknowledgement recovery and channel estimation","authors":"Alexundr M Kuzminskiy, Hamid Reza Karimi, Co~lstaatinos B Papadias","doi":"10.1109/SPAWC.2005.1505903","DOIUrl":"https://doi.org/10.1109/SPAWC.2005.1505903","url":null,"abstract":"We address the problem of downlink throughput improvement for IEEE 802.11a/g systems by using a modified access point (AP) equipped with multiple antennas. The main restriction is that standard terminals should not be modified in any way. An alternating time-offset space division multiple access (SDMA) solution is proposed to overcome restrictions imposed by the legacy terminals requirement. Simulations based on the IEEE 802.11 channel models demonstrate that a near doubling of downlink capacity can be achieved in a conference room environment.","PeriodicalId":273666,"journal":{"name":"IEEE 6th Workshop on Signal Processing Advances in Wireless Communications, 2005.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125301078","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
Cross-layer optimization of sensor networks based on cooperative MIMO techniques with rate adaptation 基于速率自适应协同MIMO技术的传感器网络跨层优化
IEEE 6th Workshop on Signal Processing Advances in Wireless Communications, 2005. Pub Date : 2005-06-05 DOI: 10.1109/SPAWC.2005.1506282
Shuguang Cui, A. Goldsmith
{"title":"Cross-layer optimization of sensor networks based on cooperative MIMO techniques with rate adaptation","authors":"Shuguang Cui, A. Goldsmith","doi":"10.1109/SPAWC.2005.1506282","DOIUrl":"https://doi.org/10.1109/SPAWC.2005.1506282","url":null,"abstract":"We consider energy-constrained networks where we need to transfer information with minimum energy consumption and delay. For such networks, cross-layer design coupled with node cooperation and rate adaptation can significantly reduce both energy consumption and delay. In this paper, we propose a cooperative multiple-input multiple-output (MIMO) technique where multiple nodes within a cluster cooperate in signal transmission and reception with optimal rate. In our scheme, local information exchange within the cluster is not necessary if Alamouti codes are used with appropriate transmission scheduling. A cross-layer design framework is then applied that optimizes routing and rate to minimize the energy consumption and delay. For the cooperative MIMO scheme, routing is optimized based on an equivalent non-cooperative system, where each cooperating cluster is treated as a super node. We derive the best energy-delay tradeoff curve under this optimization model and show that the cooperative MIMO approach dramatically improves energy and delay performance, especially when rate adaptation is used.","PeriodicalId":273666,"journal":{"name":"IEEE 6th Workshop on Signal Processing Advances in Wireless Communications, 2005.","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125226391","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: 21
Code aided near full rate multiuser TR-UWB systems 代码辅助近全速率多用户TR-UWB系统
IEEE 6th Workshop on Signal Processing Advances in Wireless Communications, 2005. Pub Date : 2005-06-05 DOI: 10.1109/SPAWC.2005.1506286
Zhengyuan Xu, Brian M. Sadler
{"title":"Code aided near full rate multiuser TR-UWB systems","authors":"Zhengyuan Xu, Brian M. Sadler","doi":"10.1109/SPAWC.2005.1506286","DOIUrl":"https://doi.org/10.1109/SPAWC.2005.1506286","url":null,"abstract":"A mean estimator has been proposed to improve template for the correlation receiver employed in a single user transmitted reference (TR) ultra wideband (UWB) system. The receiver yields satisfactory detection performance even in the presence of inter-pulse interference (IPI) while transmission rate is increased to near full rate compared to a 50% rate loss in a conventional TR system. This paper further extends the TR modulation to a multiuser scenario by assigning a pair of frame rate pseudo-random (PN) sequences to each user, modulating the amplitude of each pulse in the doublet respectively, irrespective of adopted data modulation formats. Given a user's PN sequence that modulates the reference pulse, the mean estimator is still applicable to estimate channel-distorted waveform for that user in the presence of IPI and multiple access interference. Then correlation based data demodulation is assisted by the other PN sequence modulating the data pulse, and constructed template from estimated waveform. Waveform estimation error and bit error rate detection performance are studied analytically and experimentally.","PeriodicalId":273666,"journal":{"name":"IEEE 6th Workshop on Signal Processing Advances in Wireless Communications, 2005.","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126361906","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: 7
Joint rate and cluster optimization in cooperative MIMO sensor networks 协同MIMO传感器网络中的联合速率和聚类优化
IEEE 6th Workshop on Signal Processing Advances in Wireless Communications, 2005. Pub Date : 2005-06-05 DOI: 10.1109/SPAWC.2005.1505913
L. Pillutla, V. Krishnamurthy
{"title":"Joint rate and cluster optimization in cooperative MIMO sensor networks","authors":"L. Pillutla, V. Krishnamurthy","doi":"10.1109/SPAWC.2005.1505913","DOIUrl":"https://doi.org/10.1109/SPAWC.2005.1505913","url":null,"abstract":"We design transmission schemes in cooperative MIMO sensor networks that optimize the choice of rate and cluster for minimizing the energy consumption subject to a given average probability of error. In general it was observed that, the number of clusters to optimize the energy consumption is a non-increasing function of long haul distance. By virtue of this, we conclude that as the long haul distance increases the cooperation among the nodes increases. Also, for large long haul distances the optimal number of clusters is shown to converge to a constant. Next, we propose a provably convergent block coordinate descent algorithm to determine the optimal joint rate and number of clusters. Through our numerical results it was observed that a cluster optimized cooperative MIMO transmission scheme can be more energy efficient than a rate only optimized scheme. Also a joint rate and cluster optimized transmission scheme can yield large scale energy savings for short and medium range applications compared to the rate only or cluster only optimized transmission schemes.","PeriodicalId":273666,"journal":{"name":"IEEE 6th Workshop on Signal Processing Advances in Wireless Communications, 2005.","volume":"150 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121041279","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
Space-time transmissions for wireless secret-key agreement with information-theoretic secrecy 具有信息论保密性的无线密钥协议时空传输
IEEE 6th Workshop on Signal Processing Advances in Wireless Communications, 2005. Pub Date : 2005-06-05 DOI: 10.1109/SPAWC.2005.1506252
Xiaohua, Edward Li, Mo Chen, E. Ratazzi
{"title":"Space-time transmissions for wireless secret-key agreement with information-theoretic secrecy","authors":"Xiaohua, Edward Li, Mo Chen, E. Ratazzi","doi":"10.1109/SPAWC.2005.1506252","DOIUrl":"https://doi.org/10.1109/SPAWC.2005.1506252","url":null,"abstract":"An important building block of the cross-layer network security design is the physical-layer security which addresses problems such as whether the physical-layer can have build-in security and whether physical-layer techniques can assist the upper-layer encryption-based security techniques. This paper provides a positive answer by realizing information-theoretic secrecy with space-time transmissions. While most existing results on information-theoretic secrecy rely on some impractical assumptions, we propose a more practical approach that uses the redundancy of space-time transmissions to create intentional ambiguity to the adversary. Secrecy can be guaranteed even if the adversary has extremely high receiving signal-to-noise ratio. This approach is presented as a new way for secret-key agreement. Simulations in terms of receiving error rate and secret channel capacity are presented.","PeriodicalId":273666,"journal":{"name":"IEEE 6th Workshop on Signal Processing Advances in Wireless Communications, 2005.","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134411788","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
Joint source coding diversity and cooperative diversity for multimedia communications 多媒体通信中的联合源编码分集与合作分集
IEEE 6th Workshop on Signal Processing Advances in Wireless Communications, 2005. Pub Date : 2005-06-05 DOI: 10.1109/SPAWC.2005.1505882
Andres Kwasinski, Zhu Han, K. Liu
{"title":"Joint source coding diversity and cooperative diversity for multimedia communications","authors":"Andres Kwasinski, Zhu Han, K. Liu","doi":"10.1109/SPAWC.2005.1505882","DOIUrl":"https://doi.org/10.1109/SPAWC.2005.1505882","url":null,"abstract":"Source coding diversity produces multiple independent source descriptions so as to improve the received quality. Cooperative diversity exploits the broadcast nature of wireless networks by allowing multiple users to relay information for each other, so as to create multiple signal paths. This paper studies what is the best strategy in combining these two types of diversity for real-time multimedia communications by comparing the distortion-rate performance of different joint diversity schemes. Results show that exploring both types of diversity improves the system performance most, but in most of cases, only one type of diversity can achieve most of the diversity gain. The best performance is obtained when the mobile can switch between cooperative and non-cooperative operation depending on the channel conditions. Thus, we remark that it is important to design efficient protocols that manage this switch and provides motivation for all users to cooperate.","PeriodicalId":273666,"journal":{"name":"IEEE 6th Workshop on Signal Processing Advances in Wireless Communications, 2005.","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133670714","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
Bayesian approaches for combining noisy mean and covariance channel information 结合噪声均值和协方差信道信息的贝叶斯方法
IEEE 6th Workshop on Signal Processing Advances in Wireless Communications, 2005. Pub Date : 2005-06-05 DOI: 10.1109/SPAWC.2005.1506220
D. Slock, R. de Francisco
{"title":"Bayesian approaches for combining noisy mean and covariance channel information","authors":"D. Slock, R. de Francisco","doi":"10.1109/SPAWC.2005.1506220","DOIUrl":"https://doi.org/10.1109/SPAWC.2005.1506220","url":null,"abstract":"In this paper techniques are proposed for combining information about the mean and the covariance of the channel for the purpose of two applications. One is channel estimation, possibly in a parametric or physical model form. The other concerns (partial) channel state information at the transmitter (CSIT), typically used in MIMO systems for the design of spatial prefiltering and water-filling. For the purpose of channel estimation, it has recently become customary to combine mean and covariance information in a Bayesian approach, leading to a MMSE or MAP improved channel estimate. For the purpose of generating CSIT, the cases of mean or covariance information are still being treated separately. A Bayesian approach is presented here incorporating both pieces of information. The approach yields the existing cases of mean or covariance information as special instances. We then take the unified approach one step further by allowing not only the mean information to be noisy but also the covariance information.","PeriodicalId":273666,"journal":{"name":"IEEE 6th Workshop on Signal Processing Advances in Wireless Communications, 2005.","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128951009","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
When does interference not reduce capacity in multi-antenna networks? 什么时候干扰不会降低多天线网络的容量?
IEEE 6th Workshop on Signal Processing Advances in Wireless Communications, 2005. Pub Date : 2005-06-05 DOI: 10.1109/SPAWC.2005.1505920
E. Baccarelli, M. Biagi, Cristian Peeizzoni, N. Cordeschi, Fabio Garzia
{"title":"When does interference not reduce capacity in multi-antenna networks?","authors":"E. Baccarelli, M. Biagi, Cristian Peeizzoni, N. Cordeschi, Fabio Garzia","doi":"10.1109/SPAWC.2005.1505920","DOIUrl":"https://doi.org/10.1109/SPAWC.2005.1505920","url":null,"abstract":"Multi-user interference induces performance loss in terms of BER and channel capacity when present in a communication system. Nevertheless multi-user interference can be suppressed via signal processing techniques so to improve performance. In fact, the presence of this interference reduce the channel capacity region A. Carleial et al., (1975). In this work the conditions allowing perfect interference cancellation are derived so to arrive at the same capacity region of an interference-free network.","PeriodicalId":273666,"journal":{"name":"IEEE 6th Workshop on Signal Processing Advances in Wireless Communications, 2005.","volume":"55 11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128977297","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
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