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2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications最新文献

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Effect of Imperfect Channel Knowledge on the MIMO Channel Outage Capacity 不完全信道知识对MIMO信道中断容量的影响
2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications Pub Date : 2006-07-02 DOI: 10.1109/SPAWC.2006.346462
L. Berriche, K. Abed-Meraim, J. Belfiore
{"title":"Effect of Imperfect Channel Knowledge on the MIMO Channel Outage Capacity","authors":"L. Berriche, K. Abed-Meraim, J. Belfiore","doi":"10.1109/SPAWC.2006.346462","DOIUrl":"https://doi.org/10.1109/SPAWC.2006.346462","url":null,"abstract":"In previous works, we studied the effect of imperfect channel knowledge at the receiver on the ergodic capacity of multi-input multi-output (MIMO) channels. In particular, we developed a lower bound on the mutual information and a lower bound on the ergodic capacity as a function of the Cramer-Rao bound (CRB). In this work, our aim is to find similar results with the outage capacity. Actually, we find a lower bound on the outage capacity. We also compare the effect of different MIMO channel estimation methods on the outage capacity","PeriodicalId":414942,"journal":{"name":"2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116501086","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
Multicast Relay Strategies with Local and Global Power Constraints for Wireless Networks 无线网络局部和全局功率约束下的组播中继策略
2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications Pub Date : 2006-07-02 DOI: 10.1109/SPAWC.2006.346344
N. Khajehnouri, A. H. Sayed
{"title":"Multicast Relay Strategies with Local and Global Power Constraints for Wireless Networks","authors":"N. Khajehnouri, A. H. Sayed","doi":"10.1109/SPAWC.2006.346344","DOIUrl":"https://doi.org/10.1109/SPAWC.2006.346344","url":null,"abstract":"Cooperative diversity helps combat fading over wireless links by using relay layers. The relay nodes reduce the end-to-end path loss between a source node and a destination node by amplifying and rebroadcasting the attenuated signals. In some applications, one needs to broadcast data to multiple destination terminals. In this paper, we devise MMSE relay strategies for such scenarios and study the cases of both a desired target SNR performance and a relay network with power constrained nodes. We propose three relay strategies: one strategy enforces a target SNR at each node; another strategy limits the power consumption by each node; and a third strategy limits the power consumption by the entire network","PeriodicalId":414942,"journal":{"name":"2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications","volume":"116 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128106825","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
An All Digital Implementation of M-VSB MODEM using Advanced Digital Signal Processing Techniques 利用先进的数字信号处理技术实现M-VSB调制解调器的全数字实现
2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications Pub Date : 2006-07-02 DOI: 10.1109/SPAWC.2006.346372
F. Harris, A. Ramamurthy
{"title":"An All Digital Implementation of M-VSB MODEM using Advanced Digital Signal Processing Techniques","authors":"F. Harris, A. Ramamurthy","doi":"10.1109/SPAWC.2006.346372","DOIUrl":"https://doi.org/10.1109/SPAWC.2006.346372","url":null,"abstract":"This paper presents a DSP based implementation of a vestigial side band (VSB) modem. Utilizing the flexibility of advanced/multirate signal processing techniques, a novel method is first used to generate the VSB signal at the modulator. The focus of this paper is the design of the demodulator where we demonstrate efficient carrier & timing synchronization techniques. We show that with a small change in perspective, the VSB signal can be viewed as an off-set quadrature phase shift keying (O-QPSK) signal. We exploit this perspective and present algorithms and structures applicable to O-QPSK to perform carrier and timing recovery for M-VSB","PeriodicalId":414942,"journal":{"name":"2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications","volume":"54 22","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133651453","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
Identification of Time-Varying Frequency-Flat Rayleigh Fading Channels Based on Errors-In-Variables Approach 基于误差变量法的时变频率平坦瑞利衰落信道辨识
2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications Pub Date : 2006-07-02 DOI: 10.1109/SPAWC.2006.346353
Ali Jamoos, W. Bobillet, É. Grivel, H. A. Nour, M. Najim
{"title":"Identification of Time-Varying Frequency-Flat Rayleigh Fading Channels Based on Errors-In-Variables Approach","authors":"Ali Jamoos, W. Bobillet, É. Grivel, H. A. Nour, M. Najim","doi":"10.1109/SPAWC.2006.346353","DOIUrl":"https://doi.org/10.1109/SPAWC.2006.346353","url":null,"abstract":"This paper deals with the identification of time-varying frequency-flat Rayleigh fading channels disturbed by an additive white Gaussian noise, using a training sequence based approach. When the channel is modeled by an autoregressive (AR) process, it can be estimated by using a Kalman filter. However, this solution requires the preliminary unbiased estimations of the AR parameters and the variances of both the additive noise and the driving process in the state space representation of the system. Instead of using the existing noise compensated approaches which usually require a long observation window and do not necessarily provide reliable estimates when the signal to noise ratio is low, we propose an alternative approach using recent results developed for the errors-in-variables (EIV) issue. This method consists in estimating the kernel of specific autocorrelation matrices and has the advantage of providing both the noise variances and the channel AR parameters. Moreover, the maximum Doppler frequency can be also deduced","PeriodicalId":414942,"journal":{"name":"2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications","volume":"144 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123312085","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
Particle Filter with Hybrid Importance Function for Joint Symbol Detection and Phase Tracking 联合符号检测与相位跟踪的混合重要函数粒子滤波
2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications Pub Date : 2006-07-02 DOI: 10.1109/SPAWC.2006.346358
F. Septier, Y. Delignon, Atika Menhaj-Rivenq, C. Garnier
{"title":"Particle Filter with Hybrid Importance Function for Joint Symbol Detection and Phase Tracking","authors":"F. Septier, Y. Delignon, Atika Menhaj-Rivenq, C. Garnier","doi":"10.1109/SPAWC.2006.346358","DOIUrl":"https://doi.org/10.1109/SPAWC.2006.346358","url":null,"abstract":"In digital communication, phase distortions introduced by local oscillators is one of the major concerns in designing low-cost high frequency wireless communication systems. Hence, for phase tracking and symbol detection, we propose an original algorithm which performs both phase tracking and symbol detection by a particle filtering based on the hybrid importance function. Performances of this algorithm are analyzed and compared to phase-locked loop performances in terms of bit error rate and mean square error. Asymptotic posterior Cramer-Rao bound is also derived to show performances of the optimum receiver","PeriodicalId":414942,"journal":{"name":"2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125557891","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
BER Analysis of SDMA-OFDM Systems in the Presence of Power Amplifier Nonlinearities 功率放大器非线性存在下SDMA-OFDM系统的误码率分析
2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications Pub Date : 2006-07-02 DOI: 10.1109/SPAWC.2006.346412
F. Gregorio, S. Werner, J. Cousseau, T. Laakso
{"title":"BER Analysis of SDMA-OFDM Systems in the Presence of Power Amplifier Nonlinearities","authors":"F. Gregorio, S. Werner, J. Cousseau, T. Laakso","doi":"10.1109/SPAWC.2006.346412","DOIUrl":"https://doi.org/10.1109/SPAWC.2006.346412","url":null,"abstract":"The extension of OFDM to multiuser structures like space division multiple access (SDMA) helps to increase the spectral efficiency and system capacity. However, power amplifier nonlinearities reduce severely the performance due to the high peak to average power ratio (PAPR) that is a typical characteristic of multicarrier systems. This paper derives a theoretical upper bound on the bit error rate performance of a SDMA-OFDM system subject to power amplifier nonlinearities. Simulations show good agreement with theoretical results. The BER performance as a function of power amplifier efficiency is also studied","PeriodicalId":414942,"journal":{"name":"2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129980689","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
New Diversity-Embedding STBC Constructions 新的嵌入多样性的STBC结构
2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications Pub Date : 2006-07-02 DOI: 10.1109/SPAWC.2006.346365
S. Das, N. Al-Dhahir
{"title":"New Diversity-Embedding STBC Constructions","authors":"S. Das, N. Al-Dhahir","doi":"10.1109/SPAWC.2006.346365","DOIUrl":"https://doi.org/10.1109/SPAWC.2006.346365","url":null,"abstract":"Diversity-embedding space-time codes, introduced in S.N. Diggavi et al. (2003), embed a high-diversity code within a high-rate code making opportunistic use of the channel fading conditions. They encode the information symbols into layers each at a prescribed rate-diversity operating point; thus providing an unequal error protection capability. Previous diversity-embedding space-time block codes in S.N. Diggavi et al. (2003) were presented only for 4 transmit antennas. In this paper, we present three new constructions for 2, 3, and 4 transmit antennas by varying the relative transmit power levels between the layers without violating the total transmit power constraint. The relative power scaling factor is optimized (off-line as a function of the constellation size) to achieve a desirable tradeoff between the available coding gains of the transmission layers while controlling the peak to minimum transmit power ratio","PeriodicalId":414942,"journal":{"name":"2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130061651","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: 12
Analysis of the Peak-To-Average Power Ratio for OFDM/OQAM OFDM/OQAM的峰均功率比分析
2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications Pub Date : 2006-07-02 DOI: 10.1109/SPAWC.2006.346413
A. Skrzypczak, P. Siohan, Jean-Philippe Javaudin
{"title":"Analysis of the Peak-To-Average Power Ratio for OFDM/OQAM","authors":"A. Skrzypczak, P. Siohan, Jean-Philippe Javaudin","doi":"10.1109/SPAWC.2006.346413","DOIUrl":"https://doi.org/10.1109/SPAWC.2006.346413","url":null,"abstract":"OFDM/OQAM is now a recognized alternative to conventional OFDM for the transmission of signals over multipath fading channels. Indeed with OFDM/OQAM an appropriate pulse-shaping can be introduced to fight against time and frequency dispersion. This paper focuses on a theoretical and experimental analysis of the peak-to-average power ratio (PAPR) for OFDM/OQAM. It is shown that the best complementary cumulative density function (CCDF) is obtained with orthogonal prototype filters","PeriodicalId":414942,"journal":{"name":"2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116353699","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: 46
Upper Bound on Outage Capacity of Orthogonal Relay Networks 正交中继网络中断容量的上界
2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications Pub Date : 2006-07-02 DOI: 10.1109/SPAWC.2006.346496
J. Gómez-Vilardebó, A. Pérez-Neira
{"title":"Upper Bound on Outage Capacity of Orthogonal Relay Networks","authors":"J. Gómez-Vilardebó, A. Pérez-Neira","doi":"10.1109/SPAWC.2006.346496","DOIUrl":"https://doi.org/10.1109/SPAWC.2006.346496","url":null,"abstract":"We consider the orthogonal multiple relay channel at the low SNR regime. The source transmits to the destination and all the possible relays in one channel and the relays transmit in different and orthogonal channels making use of the transmission received from the source. This cooperative strategy achieves diversity gains at a high cost in bandwidth efficiency, due to the orthogonality of the transmissions. However, it has the desired benefit of allowing all the nodes in the network to behave as in a point to point channel. Based on the max-flow min-cut upper bound for relay networks, we explore the capacity limits of this kind of communication, obtaining an upper bound on the capacity when full channel state information (CSI) is available at every network node. This focus gives insight on the design of the transmitting strategy and define how feedback from relays and destination can be performed practically and optimally, giving ideas for higher layer protocols","PeriodicalId":414942,"journal":{"name":"2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124072487","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
Line Search Computation of the Block Factor Model for Blind Multi-User Access in Wireless Communications 无线通信中盲多用户接入块因子模型的线搜索计算
2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications Pub Date : 2006-07-02 DOI: 10.1109/SPAWC.2006.346405
D. Nion, L. De Lathauwer
{"title":"Line Search Computation of the Block Factor Model for Blind Multi-User Access in Wireless Communications","authors":"D. Nion, L. De Lathauwer","doi":"10.1109/SPAWC.2006.346405","DOIUrl":"https://doi.org/10.1109/SPAWC.2006.346405","url":null,"abstract":"In this paper, we present a technique for the blind separation of DS-CDMA signals received on an antenna array, for a multi-path propagation scenario that generates inter-symbol-interference. Our method relies on a new third-order tensor decomposition, which is a generalization of the parallel factor model. We start from the observation that the temporal, spatial and spectral diversities give a third-order tensor structure to the received data. This tensor is then decomposed in a sum of contributions, where each contribution fully characterizes one user. We also present a line search scheme that greatly improves the convergence speed of the alternating least squares algorithm previously used","PeriodicalId":414942,"journal":{"name":"2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications","volume":"153 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131521673","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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