2014 IEEE 15th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)最新文献

A software radio design for communications in uncoordinated networks 一种用于非协调网络通信的软件无线电设计

2014 IEEE 15th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2014-06-22 DOI: 10.1109/SPAWC.2014.6941584

Kapil M. Borle, Fangfang Zhu, Yu Zhao, Biao Chen

引用次数: 3

Neural networks-based turbo equalization of a satellite communication channel 基于神经网络的卫星通信信道turbo均衡

2014 IEEE 15th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2014-06-22 DOI: 10.1109/SPAWC.2014.6941914

H. Abdulkader, B. Benammar, C. Poulliat, M. Boucheret, N. Thomas

引用次数: 7

Near-field source localization with partly sensor gain and phase uncertainties 部分传感器增益和相位不确定性的近场源定位

2014 IEEE 15th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2014-06-22 DOI: 10.1109/SPAWC.2014.6941357

Weiliang Zuo, J. Xin, Guangmin Wang, Jiasong Wang, Nanning Zheng, A. Sano

引用次数: 6

Optimal OFDM pilot sequences for time-delay and channel estimation based on the expected CRB for a large number of subcarriers 最优OFDM导频序列的时延和信道估计基于期望CRB的大量子载波

2014 IEEE 15th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2014-06-22 DOI: 10.1109/SPAWC.2014.6941323

Arash Shahmansoori, Rafael Montalban, G. Seco-Granados

{"title":"Optimal OFDM pilot sequences for time-delay and channel estimation based on the expected CRB for a large number of subcarriers","authors":"Arash Shahmansoori, Rafael Montalban, G. Seco-Granados","doi":"10.1109/SPAWC.2014.6941323","DOIUrl":"https://doi.org/10.1109/SPAWC.2014.6941323","url":null,"abstract":"A key aspect to design an OFDM system for combined positioning and high-data-rate communications is to find optimal data and pilot power allocations. Previous work has investigated the capacity maximizing design taking into account the effects of channel and time-delay estimation for finite number of subcarriers and channel taps. In this paper, we propose a method based on the asymptotic expected Cramér-Rao bound of joint time-delay and channel coefficients that reduces the complexity of the bounds by increasing the number of subcarriers or channel taps for data and pilot power allocations design. Specifically, for long channels a general form of matrix inversion, which is computationally complex, is converted to only the inversion at strong eigenvalues or pilots. Numerical results show that as the number of subcarriers increases, the non-asymptotic bounds converge to the asymptotic bounds at a fast speed. Moreover, even for a finite number of subcarriers or channel taps the difference between joint data and pilot power allocations is negligible compared to the non-asymptotic expected Cramér-Rao bounds.","PeriodicalId":420837,"journal":{"name":"2014 IEEE 15th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116611828","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

On the complexity of very large multi-user MIMO detection 论超大多用户MIMO检测的复杂性

2014 IEEE 15th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2014-06-22 DOI: 10.1109/SPAWC.2014.6941316

Mirsad Cirkic, E. Larsson

引用次数: 11

Dynamic base station switch on/off strategies for sustainable wireless networks 可持续无线网络的动态基站开关策略

2014 IEEE 15th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2014-06-22 DOI: 10.1109/SPAWC.2014.6941651

J. Rubio, A. Pascual-Iserte, Jaume del Olmo Alos, J. Vidal

引用次数: 5

Zadoff-Chu sequence based time-domain SNR estimation for OFDM systems 基于Zadoff-Chu序列的OFDM系统时域信噪比估计

2014 IEEE 15th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2014-06-22 DOI: 10.1109/SPAWC.2014.6941327

M. Živković, R. Mathar

{"title":"Zadoff-Chu sequence based time-domain SNR estimation for OFDM systems","authors":"M. Živković, R. Mathar","doi":"10.1109/SPAWC.2014.6941327","DOIUrl":"https://doi.org/10.1109/SPAWC.2014.6941327","url":null,"abstract":"The optimization of wireless orthogonal frequency division multiplexing (OFDM) systems is based on the knowledge of the signal-to-noise ratio (SNR). Most of the existing methods for the SNR estimation operates in the frequency-domain and assumes perfect carrier frequency offset (CFO) synchronization. However, it has been shown that in real systems in the presence of the residual CFO this estimators are prone to performance degradation. This problem can be avoided by estimating the SNR in the time-domain. In this paper, a novel low-complexity time-domain SNR estimator based on time periodic Zadoff-Chu (ZC) sequence, named TDZCE, is proposed. When applied to the time periodic synchronization preamble, commonly used in packed based OFDM systems, the special property of a ZC sequence preserves the considered comb-type structure both in the frequency and time-domain. This allows for easy adaptation of previously proposed moment-based SNR estimator to be applied to the time-domain samples. The TDZCE outperforms the existing time-domain SNR estimators in frequency-flat channels in the presence of the CFO, and approaches the Cramer-Rao bound (CRB) as the number of periodic parts of the proposed preamble increases. Additionally, it offers considerable computational savings compared to the existing time-domain SNR estimators.","PeriodicalId":420837,"journal":{"name":"2014 IEEE 15th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)","volume":"122 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132635859","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

Submodular structure and optimal quantization in Gaussian multiple access relay networks 高斯多址中继网络的子模块结构与最优量化

2014 IEEE 15th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2014-06-22 DOI: 10.1109/SPAWC.2014.6941695

Maximilian Riemensberger, Lennart Gerdes, W. Utschick

引用次数: 5

Mm-wave MIMO channel modeling and user localization using sparse beamspace signatures 利用稀疏波束空间特征的毫米波MIMO信道建模和用户定位

2014 IEEE 15th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2014-06-22 DOI: 10.1109/SPAWC.2014.6941331

H. Deng, A. Sayeed

{"title":"Mm-wave MIMO channel modeling and user localization using sparse beamspace signatures","authors":"H. Deng, A. Sayeed","doi":"10.1109/SPAWC.2014.6941331","DOIUrl":"https://doi.org/10.1109/SPAWC.2014.6941331","url":null,"abstract":"Millimeter-wave (mm-wave) communication systems operating between 30GHz and 300GHz are emerging as a promising technology for meeting the exploding bandwidth requirements of future wireless systems. In addition to large bandwidths, mm-wave systems afford high-dimensional multiple input multiple output (MIMO) operation with relatively compact arrays, and the corresponding narrow spatial beams make beamspace MIMO communication particular attractive. An important implication is that while the ambient spatial dimension is high, mm-wave MIMO channels exhibit a low-rank structure that is manifested in the sparsity of the beamspace MIMO channel matrix. In this paper, we develop a model for sparse mm-wave MIMO channels and propose an approach to mobile station (MS) localization that exploits changes in statistics of the sparse beamspace channel matrix as a function of the MS position. Unlike most existing methods, line-of-sight (LoS) propagation is not mandatory and the proposed approach benefits from the information provided by non-line-of-sight (NLoS) paths. Beamspace sparsity is exploited for developing a low-dimensional maximum-likelihood (ML) classifier that delivers near-optimal performance with dramatically reduced complexity compared to conventional designs. Numerical results illustrate the impact of the physical environment, grid-resolution, and MIMO dimensions on localization performance.","PeriodicalId":420837,"journal":{"name":"2014 IEEE 15th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)","volume":"36 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124176629","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: 90

Information rates employing 1-bit quantization and oversampling at the receiver 在接收机采用1位量化和过采样的信息速率

2014 IEEE 15th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2014-06-22 DOI: 10.1109/SPAWC.2014.6941477

L. Landau, G. Fettweis

引用次数: 13