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

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Optimal design of linear arrays in a TDMA cellular system with Gaussian interference 具有高斯干扰的时分多址蜂窝系统线性阵列的优化设计
IEEE 6th Workshop on Signal Processing Advances in Wireless Communications, 2005. Pub Date : 2005-06-05 DOI: 10.1109/SPAWC.2005.1506072
S. Savazzi, O. Simeone, U. Spagnolini
{"title":"Optimal design of linear arrays in a TDMA cellular system with Gaussian interference","authors":"S. Savazzi, O. Simeone, U. Spagnolini","doi":"10.1109/SPAWC.2005.1506072","DOIUrl":"https://doi.org/10.1109/SPAWC.2005.1506072","url":null,"abstract":"Optimal design of a linear antenna array at the base station is investigated for the uplink of a TDMA cellular system. The problem is formulated as the maximization of the (ergodic or outage) capacity and entails the trade-off between diversity gain (large antenna spacing) and interference-rejection capability of the array (small antenna spacing). In many applications the positions of user and interferes are not known a priori at the time of the antenna deployment or the terminals are mobile. Therefore, the optimization is carried out not only for a fixed positions of users and interferers, but also by averaging aging the capacity over the positions of users and interferers within their cells. The approach to the solution of this problem is twofold. At first, an approximate analytical closed form expression for the capacity as a function of the antenna spacing is derived. Then, the results so obtained are corroborated by optimizing the exact capacity though an extensive search over the optimization domain.","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":"124668789","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
Bit-error rate optimized training for time-varying fading channels 时变衰落信道误码率优化训练
IEEE 6th Workshop on Signal Processing Advances in Wireless Communications, 2005. Pub Date : 2005-06-05 DOI: 10.1109/SPAWC.2005.1506047
S. Misra, A. Swami, T. Moore
{"title":"Bit-error rate optimized training for time-varying fading channels","authors":"S. Misra, A. Swami, T. Moore","doi":"10.1109/SPAWC.2005.1506047","DOIUrl":"https://doi.org/10.1109/SPAWC.2005.1506047","url":null,"abstract":"We study time division multiplexed training (TDMT) for the temporally correlated Rayleigh flat-fading channel. For a class of causal and non-causal estimators, we derive the bit-error rate (BER) of TDMT assuming grey-coded M-PSK input. The high-SNR performance of the estimators is characterized by simplified expressions for the minimum attainable BER. It is shown that energy allocation techniques that are often assumed to boost performance of TDMT may be useful in this setting, but only for the simplest estimators and at moderate values of SNR.","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":"125528027","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
Linear one tap equalizer for the spatial diversity based on GI-less OFDM system 基于无gi OFDM系统的空间分集线性一分路均衡器
IEEE 6th Workshop on Signal Processing Advances in Wireless Communications, 2005. Pub Date : 2005-06-05 DOI: 10.1109/SPAWC.2005.1505888
F. O. Alayyan, Y. Leung, A. Zoubir
{"title":"Linear one tap equalizer for the spatial diversity based on GI-less OFDM system","authors":"F. O. Alayyan, Y. Leung, A. Zoubir","doi":"10.1109/SPAWC.2005.1505888","DOIUrl":"https://doi.org/10.1109/SPAWC.2005.1505888","url":null,"abstract":"In this paper, we introduce pre-FFT and post-FFT equalizers for an OFDM system without using a guard interval. Inter-symbol-interference is significantly reduced by adopting virtual sub-carriers. We extend the idea of spatial diversity to the proposed system to obtain high performance equalization in the presence of additive channel noise. The performance of the proposed equalizers is illustrated by computer simulations.","PeriodicalId":273666,"journal":{"name":"IEEE 6th Workshop on Signal Processing Advances in Wireless Communications, 2005.","volume":"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":"123591985","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
Distribution of quadratic form in Gaussian mixture variables and an application in relay networks 高斯混合变量的二次型分布及其在中继网络中的应用
IEEE 6th Workshop on Signal Processing Advances in Wireless Communications, 2005. Pub Date : 2005-06-05 DOI: 10.1109/SPAWC.2005.1506073
Nilay Shah, Hongbin Li
{"title":"Distribution of quadratic form in Gaussian mixture variables and an application in relay networks","authors":"Nilay Shah, Hongbin Li","doi":"10.1109/SPAWC.2005.1506073","DOIUrl":"https://doi.org/10.1109/SPAWC.2005.1506073","url":null,"abstract":"In this paper series expansion is developed for the probability distribution function (PDF) and the cumulative distribution function (CDF) of an indefinite Hermitian quadratic form in complex random variables with Gaussian mixture distribution. The moment generating function is inverted by contour integration using the residue theorem. The series expansion result is computationally efficient. Bit error rate (BER) calculation, involving quadratic form in Gaussian mixture variables, in wireless relay network employing BPSK transmission is presented as an application.","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":"129176319","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
Multi-antenna noncoherent ML synchronization for UWB-IR outdoor channels UWB-IR室外信道多天线非相干ML同步
IEEE 6th Workshop on Signal Processing Advances in Wireless Communications, 2005. Pub Date : 2005-06-05 DOI: 10.1109/SPAWC.2005.1506037
E. Baccarelli, M. Biagi, C. Pelizzoni, N. Cordeschi, F. Garzia
{"title":"Multi-antenna noncoherent ML synchronization for UWB-IR outdoor channels","authors":"E. Baccarelli, M. Biagi, C. Pelizzoni, N. Cordeschi, F. Garzia","doi":"10.1109/SPAWC.2005.1506037","DOIUrl":"https://doi.org/10.1109/SPAWC.2005.1506037","url":null,"abstract":"This contribution focuses on the (up to date unexplored) topic of the maximum-likelihood (ML) noncoherent synchronization of multi-antenna transceivers working in faded environments and employing ultra wide band impulse radio (UWB-IR) transmit technology. The noncoherent ML synchronizer is developed for the most performing transmit scheme (e.g., the SIMO one) and its performance are evaluated under both signal-acquisition and tracking operating conditions. The performance gain in the synchronization of UWB-IR signals arising by the utilization of the multi-antenna technology is also evaluated.","PeriodicalId":273666,"journal":{"name":"IEEE 6th Workshop on Signal Processing Advances in Wireless Communications, 2005.","volume":"45 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":"131302030","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 rate control algorithm for uplink high-speed packet data transmission in UMTS UMTS中上行高速分组数据传输的速率控制算法
IEEE 6th Workshop on Signal Processing Advances in Wireless Communications, 2005. Pub Date : 2005-06-05 DOI: 10.1109/SPAWC.2005.1506236
J.A.C. Lee, A. Rao, S. Nagaraj
{"title":"A rate control algorithm for uplink high-speed packet data transmission in UMTS","authors":"J.A.C. Lee, A. Rao, S. Nagaraj","doi":"10.1109/SPAWC.2005.1506236","DOIUrl":"https://doi.org/10.1109/SPAWC.2005.1506236","url":null,"abstract":"High speed data services are becoming increasingly important in the uplink of wireless communication systems in order to support applications such as FTP, E-Mail, and gaming. In Release 6 of the universal mobile telecommunications system (UMTS) standard, an enhanced dedicated channel (E-DCH) has been introduced to provide high-speed packet data transmission in the uplink. This channel has the capability to provide high data rate services, both for best-effort and delay-sensitive applications, by introducing scheduling of users with fast resource allocation at the base station. In this paper, we propose an efficient uplink resource allocation algorithm comprising an overload control algorithm, a rate control algorithm, and a soft handoff (SHO) load control algorithm. System-level simulation results are presented that demonstrate the performance of the proposed algorithm in a multi-cell, multi-user environment. Our simulation result shows that scheduling many users with similar rates leads to a desirable short rise-over-thermal (RoT) tail behavior and better user fairness than scheduling a few high data rate users. The performance analysis of the proposed SHO load control algorithm shows that the algorithm is effective in controlling the tradeoff between cell throughput and user fairness.","PeriodicalId":273666,"journal":{"name":"IEEE 6th Workshop on Signal Processing Advances in Wireless Communications, 2005.","volume":"124 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":"124199792","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
Coding for sensor networks using untuned radios 对使用未调谐无线电的传感器网络进行编码
IEEE 6th Workshop on Signal Processing Advances in Wireless Communications, 2005. Pub Date : 2005-06-05 DOI: 10.1109/SPAWC.2005.1506309
D. Petrovic, K. Ramchandran, J. Rabaey
{"title":"Coding for sensor networks using untuned radios","authors":"D. Petrovic, K. Ramchandran, J. Rabaey","doi":"10.1109/SPAWC.2005.1506309","DOIUrl":"https://doi.org/10.1109/SPAWC.2005.1506309","url":null,"abstract":"The drive toward the implementation and massive deployment of wireless sensor networks calls for ultra-low-cost and low-power nodes. While the digital subsystems of the nodes are still riding Moore's Law, there is no such trend regarding the performance of analog components. This work presents a fully integrated architecture of both digital and analog components (including local oscillator) that offers significant reduction in cost, size and power consumption of the overall node. While such a radical architecture cannot offer the reliable tuning of standard designs, it is shown that by using randomized signal processing techniques, a dense network of such nodes can achieve throughput linear in the number of channels available for communication. Moreover, the ratio of the achievable throughput of the untuned network to the throughput of a tuned network with perfect coordination is shown to be close to 1/e.","PeriodicalId":273666,"journal":{"name":"IEEE 6th Workshop on Signal Processing Advances in Wireless Communications, 2005.","volume":"12 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":"128949761","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
Analytical BER performance in spatial multiplexing MIMO systems 空间复用MIMO系统的分析误码率性能
IEEE 6th Workshop on Signal Processing Advances in Wireless Communications, 2005. Pub Date : 2005-06-05 DOI: 10.1109/SPAWC.2005.1506067
L. Garcia-Ordonez, D. Palomar, A. Pagès-Zamora, J. Fonollosa
{"title":"Analytical BER performance in spatial multiplexing MIMO systems","authors":"L. Garcia-Ordonez, D. Palomar, A. Pagès-Zamora, J. Fonollosa","doi":"10.1109/SPAWC.2005.1506067","DOIUrl":"https://doi.org/10.1109/SPAWC.2005.1506067","url":null,"abstract":"In this paper, we investigate the average bit error rate (BER) performance of spatial multiplexing MIMO systems with CSI at both sides of the link. Such systems result from the use of a multiple beamforming strategy that exploits the channel eigenmodes or, in other words, from the use of joint transmit-receive linear signal processing techniques in multiantenna systems. Since an analytical closed-form expression for the average BER of the multiple beamforming scheme is difficult to be found, we derive an approximation of the BER performance for high signal-to-noise ratio (SNR) assuming a Rayleigh flat fading channel. In the high SNR regime, the BER versus SNR curve can be characterized in terms of two key parameters: the array gain and the diversity gain. Thus, the proposed analysis offers a simple approach to determine the average performance of the multiple beamforming scheme.","PeriodicalId":273666,"journal":{"name":"IEEE 6th Workshop on Signal Processing Advances in Wireless Communications, 2005.","volume":"6 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":"128639535","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
Distributed optimal resource allocation for fading relay broadcast channels 衰落中继广播信道的分布式最优资源分配
IEEE 6th Workshop on Signal Processing Advances in Wireless Communications, 2005. Pub Date : 2005-06-05 DOI: 10.1109/SPAWC.2005.1506200
Yan Liang, V. Veeravalli
{"title":"Distributed optimal resource allocation for fading relay broadcast channels","authors":"Yan Liang, V. Veeravalli","doi":"10.1109/SPAWC.2005.1506200","DOIUrl":"https://doi.org/10.1109/SPAWC.2005.1506200","url":null,"abstract":"Resource allocation for a fading orthogonal relay broadcast channel model is investigated, where the source broadcasts to two users using a time-division (TD) scheme in one channel, and the two users transmit relay signals to each other in another orthogonal channel. The channel bandwidth resource is assumed to be allocated equally for broadcast and relay transmissions. Separate power constraints are assumed at the source and the two users. The fading state information is assumed to be known at both the transmitter and receiver of each link, and hence the source and the two users can allocate their power adaptively according to the instantaneous channel state information in a distributed manner. For a fixed allocation of time (for TD broadcast) and power, an achievable rate region based on the relays using the decode-forward scheme for this model is derived. The resource (time and power) allocation is then optimized to maximize each boundary point of this rate region.","PeriodicalId":273666,"journal":{"name":"IEEE 6th Workshop on Signal Processing Advances in Wireless Communications, 2005.","volume":"4 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":"128783794","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
Exploiting Slepian-Wolf codes in wireless user cooperation 利用无线用户合作中的睡狼代码
IEEE 6th Workshop on Signal Processing Advances in Wireless Communications, 2005. Pub Date : 2005-06-05 DOI: 10.1109/SPAWC.2005.1505915
R. Hu, Jing Li
{"title":"Exploiting Slepian-Wolf codes in wireless user cooperation","authors":"R. Hu, Jing Li","doi":"10.1109/SPAWC.2005.1505915","DOIUrl":"https://doi.org/10.1109/SPAWC.2005.1505915","url":null,"abstract":"A novel scheme, termed Slepian-Wolf cooperation, is proposed, which exploits distributed source coding technologies in wireless cooperative communication to improve the inter-user outage performance. After motivating the idea, we discuss in detail a simple estimation mechanism, a combined data-syndrome transmission strategy and an optimal joint decoding algorithm. Using low-density parity-check codes as an example, we show that encouraging gains of up to 13 dB for the outage performance and 3.8 dB for the overall performance can be achieved on block Rayleigh fading channels.","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":"129064626","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: 33
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