2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)最新文献_第8页

Performance limitations of localization based on ranging, speed, and orientation 基于距离、速度和方向的定位性能限制

2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2015-08-31 DOI: 10.1109/SPAWC.2015.7227086

C. Fischione, A. D. Angelis

{"title":"Performance limitations of localization based on ranging, speed, and orientation","authors":"C. Fischione, A. D. Angelis","doi":"10.1109/SPAWC.2015.7227086","DOIUrl":"https://doi.org/10.1109/SPAWC.2015.7227086","url":null,"abstract":"Estimating the position of a mobile node by linear sensor fusion of ranging, speed, and orientation measurements has the potentiality to achieve high localization accuracy. Nevertheless, the design of these sensor fusion algorithms is uncertain if their fundamental limitations are unknown. Despite the substantial research focus on these sensor fusion methods, the characterization of the Cramér Rao Lower Bound (CRLB) has not yet been satisfactorily addressed. In this paper, the existence and derivation of the posterior CRLB for the linear sensor fusion of ranging, speed, and orientation measurements is investigated. The major difficulty in the analysis is that ranging and orientation are not linearly related to the position, which makes it hard to derive the posterior CRLB. This difficulty is overcome by introducing the concept of posterior CRLB in the Cauchy principal value sense and deriving explicit upper and lower bounds to the posteriori Fisher information matrix. Numerical simulation results are provided for both the parametric CRLB and the posterior CRLB, comparing some widely-used methods from the literature to the derived bound. It is shown that many existing methods based on Kalman filtering may be far from the the fundamental limitations given by the CRLB.","PeriodicalId":211324,"journal":{"name":"2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133294323","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

Optimal design of energy-efficient cooperative WSNs: How many sensors are needed? 高效节能协同wsn的优化设计:需要多少个传感器?

2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2015-08-31 DOI: 10.1109/SPAWC.2015.7226994

S. Mijovic, L. Sanguinetti, C. Buratti, M. Debbah

引用次数: 3

Subspace estimation and decomposition for hybrid analog-digital millimetre-wave MIMO systems 模拟-数字混合毫米波MIMO系统的子空间估计与分解

2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2015-08-31 DOI: 10.1109/SPAWC.2015.7227067

H. Ghauch, M. Bengtsson, Taejoon Kim, M. Skoglund

引用次数: 27

Virtual AoA and AoD estimation for sparse millimeter wave MIMO channels 稀疏毫米波MIMO信道的虚拟AoA和AoD估计

2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2015-08-31 DOI: 10.1109/SPAWC.2015.7227017

Taejoon Kim, D. Love

引用次数: 70

The pathwise MIMO Interfering Broadcast Channel 路径MIMO干扰广播信道

2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2015-08-31 DOI: 10.1109/SPAWC.2015.7227039

Wassim Tabikh, D. Slock, Y. Yuan-Wu

{"title":"The pathwise MIMO Interfering Broadcast Channel","authors":"Wassim Tabikh, D. Slock, Y. Yuan-Wu","doi":"10.1109/SPAWC.2015.7227039","DOIUrl":"https://doi.org/10.1109/SPAWC.2015.7227039","url":null,"abstract":"Interference alignment (IA) through beamforming in MIMO Interfering Broadcast Channels (IBC) allows to handle multi-cell interference with low latency. However, with multiple antennas on both ends, the MIMO setting requires global Channel State Information at the Transmitter (CSIT) (i.e. CSIT from the other transmitters (Tx) also). Though global CSIT can be organized within a cluster, it leads to significant fast CSIT acquisition overhead. In this paper we focus on the (dominant) multipath components in the MIMO propagation channels with only the slow fading components known to the Tx, corresponding to a structured form of covariance CSIT. The pathwise approach allows for a decomposition of the alignment tasks between Tx and receivers (Rx), leading to the sufficiency of local pathwise CSIT plus limited coordination overhead. To optimize Ergodic Weighted Sum Rate at finite SNR, we exploit the uplink/downlink duality to design the Tx beamformers as MMSE filters, in which averaging over complex path amplitudes leads to pathwise filters. We furthermore explore a relation between the difference of convex (DC) functions programming and the Weighted Sum MSE (WSMSE) approaches, indicating significant convergence speed potential for the former, and allowing a fixing of the latter for the case of partial CSIT.","PeriodicalId":211324,"journal":{"name":"2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127870413","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

Massive MIMO for decentralized estimation over coherent multiple access channels 相干多址信道上的大规模MIMO分散估计

2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2015-08-31 DOI: 10.1109/SPAWC.2015.7227036

A. Shirazinia, S. Dey, D. Ciuonzo, P. Rossi

{"title":"Massive MIMO for decentralized estimation over coherent multiple access channels","authors":"A. Shirazinia, S. Dey, D. Ciuonzo, P. Rossi","doi":"10.1109/SPAWC.2015.7227036","DOIUrl":"https://doi.org/10.1109/SPAWC.2015.7227036","url":null,"abstract":"We consider a decentralized multisensor estimation problem where L sensor nodes observe noisy versions of a possibly correlated random source. The sensors amplify and forward their observations over a fading coherent multiple access channel (MAC) to a fusion center (FC). The FC is equipped with a large array of N antennas, and adopts a minimum mean square error (MMSE) approach for estimating the source. We optimize the amplification factor (or equivalently transmission power) at each sensor node in two different scenarios: 1) with the objective of total power minimization subject to mean square error (MSE) of source estimation constraint, and 2) with the objective of minimizing MSE subject to total power constraint. For this purpose, we apply an asymptotic approximation based on the massive multiple-input-multiple-output (MIMO) favorable propagation condition (when L ≪ N). We use convex optimization techniques to solve for the optimal sensor power allocation in 1) and 2). In 1), we show that the total power consumption at the sensors decays as 1/N, replicating the power savings obtained in Massive MIMO mobile communications literature. Through numerical studies, we also illustrate the superiority of the proposed optimal power allocation methods over uniform power allocation.","PeriodicalId":211324,"journal":{"name":"2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133989942","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

Optimized burst truncation in fast-convolution filter bank based waveform generation 基于快速卷积滤波器组的波形生成中突发截断的优化

2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2015-08-31 DOI: 10.1109/SPAWC.2015.7227002

J. Yli-Kaakinen, M. Renfors

引用次数: 6

Subcarrier spacing - a neglected degree of freedom? 副载波间距——一个被忽视的自由度?

2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2015-08-31 DOI: 10.1109/SPAWC.2015.7226999

F. Schaich, T. Wild

{"title":"Subcarrier spacing - a neglected degree of freedom?","authors":"F. Schaich, T. Wild","doi":"10.1109/SPAWC.2015.7226999","DOIUrl":"https://doi.org/10.1109/SPAWC.2015.7226999","url":null,"abstract":"In this paper we assess the pains and potential gains a wireless communication system can leverage on, if we allow for multiplexing different subcarrier spacings within a single transmission time interval (TTI). CP-OFDM is nowadays most often the signal format of choice in wireless communication systems when serving multiple users. LTE/-A, WiFi and WiMAX have all adopted CP-OFDM due to its high degree of flexibility. Though, not all degrees of freedom have been exploited in those systems yet. While these systems are using tailored waveform parameters according to the respective setting - e.g. while WiFi is more tailored towards local area, 4G and WiMAX use settings more suited for wide area - 5G may go one step further by allowing for user specific settings within a single band. With allowing this the signal characteristics may be better matched to the respective channel characteristics such as high Doppler spreads and low coherence times. Our investigations have shown that with exploiting this degree of freedom a higher range of user velocities may be supported, especially with replacing CP-OFDM by UF-OFDM. UF-OFDM modifies the OFDM concept by subband-wise filtering, which mitigates inter-carrier interference (ICI) arising from different parallel subcarrier spacings. This makes it a natural fit for being combined with user-specific subcarrier spacings.","PeriodicalId":211324,"journal":{"name":"2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124921082","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

Turbo-FSK: A new uplink scheme for low power wide area networks Turbo-FSK:一种新的低功率广域网上行方案

2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2015-08-31 DOI: 10.1109/SPAWC.2015.7227004

Yoann Roth, Jean-Baptiste Doré, L. Ros, V. Berg

引用次数: 25

Selection combining, and opportunistic relaying, with many diversity branches: Switching rates for most common fading types 具有许多分集分支的选择组合和机会中继:大多数常见衰落类型的切换速率

2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2015-08-31 DOI: 10.1109/SPAWC.2015.7227099

David B. Smith

{"title":"Selection combining, and opportunistic relaying, with many diversity branches: Switching rates for most common fading types","authors":"David B. Smith","doi":"10.1109/SPAWC.2015.7227099","DOIUrl":"https://doi.org/10.1109/SPAWC.2015.7227099","url":null,"abstract":"A closed form expression for the switching rate of selection combining, and opportunistic relaying, with any number of diversity branches, is derived for most common types of fading, including, but not limited to - gamma, lognormal, normal, exponential, Rayleigh, Weibull, generalized gamma (or alpha-mu) and Nakagami-m fading, and Rician fading as a close approximation. These types of fading can all be described by the Amoroso distribution, and here we assume that the fading at each branch is independent and identically distributed (i.i.d.). The switching rate is shown to be only dependent upon the number of branches, Doppler spread, and a shape parameter of an underlying four-parameter Amoroso distribution. Hence the switching rate can simply be evaluated from a one-parameter standard gamma distribution. In the limit of the shape parameter, a further simplified closed form approximation to switching rate is provided for lognormal fading, which is only dependent upon the number of diversity branches, and shown to not be dependent on log-mean or log-standard deviation. Further all theoretical evaluations are shown to closely match those of simulated time-selective fading for a range of shape parameters, including shape parameters tending to infinity, relevant to normal and lognormal fading.","PeriodicalId":211324,"journal":{"name":"2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126736817","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