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

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Dictionary-free hybrid precoders and combiners for mmWave MIMO systems 用于毫米波MIMO系统的无字典混合预编码器和组合器
2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2015-08-27 DOI: 10.1109/SPAWC.2015.7227018
Roi Méndez-Rial, Cristian Rusu, N. G. Prelcic, R. Heath
{"title":"Dictionary-free hybrid precoders and combiners for mmWave MIMO systems","authors":"Roi Méndez-Rial, Cristian Rusu, N. G. Prelcic, R. Heath","doi":"10.1109/SPAWC.2015.7227018","DOIUrl":"https://doi.org/10.1109/SPAWC.2015.7227018","url":null,"abstract":"The high cost and power consumption of the radio frequency chain and data converters at mmWave frequencies introduce hardware limitations into the design of MIMO precoders and combiners. MmWave hybrid precoding overcomes this limitation by dividing the spatial signal processing between the radio frequency and baseband domains. Analog networks of phase shifters have been proposed to implement the radio frequency precoders, since they achieve a good compromise between complexity and performance. In this paper, we propose a low complexity hybrid precoding design for the architecture based on phase shifters. The new method is a greedy algorithm based on the orthogonal matching pursuit algorithm, but replacing the costly correlation operations over a dictionary with the element-wise normalization of the first singular vector of the residual. The main advantage is that the design avoids any assumption on the antenna array geometry. Additionally, numerical results show the superiority of the proposed method in terms of achievable spectral efficiency over other previous solutions.","PeriodicalId":211324,"journal":{"name":"2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115716174","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: 70
Interference alignment via Feasible Point Pursuit 通过可行点追踪进行干涉对准
2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2015-08-27 DOI: 10.1109/SPAWC.2015.7227116
Aritra Konar, Ruoyu Sun, N. Sidiropoulos, Z. Luo
{"title":"Interference alignment via Feasible Point Pursuit","authors":"Aritra Konar, Ruoyu Sun, N. Sidiropoulos, Z. Luo","doi":"10.1109/SPAWC.2015.7227116","DOIUrl":"https://doi.org/10.1109/SPAWC.2015.7227116","url":null,"abstract":"Designing iterative algorithms for interference alignment (IA) is very useful for both practical and theoretical purposes. However, the existing works on iterative IA algorithms have not reported significant gains in terms of the DoF (Degrees of Freedom) over simple orthogonalization schemes. In this paper, we aim to design an iterative IA algorithm that can achieve high DoF. We recast the problem of designing linear transceivers for interference alignment as a non-convex quadratic feasibility problem, and apply an extension of the recently proposed Feasible Point Pursuit Successive Convex Approximation (FPP-SCA) algorithm [8] to solve it. Simulations suggest that the proposed algorithm can attain DoF very close to the known theoretical upper bound in certain cases, significantly outperforming existing approaches.","PeriodicalId":211324,"journal":{"name":"2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127111229","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
Competitive design of energy harvesting communications in wireless fading channels 无线衰落信道中能量收集通信的竞争性设计
2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2015-07-01 DOI: 10.1109/SPAWC.2015.7226990
J. Gómez-Vilardebó
{"title":"Competitive design of energy harvesting communications in wireless fading channels","authors":"J. Gómez-Vilardebó","doi":"10.1109/SPAWC.2015.7226990","DOIUrl":"https://doi.org/10.1109/SPAWC.2015.7226990","url":null,"abstract":"This paper considers the design of online transmission policies for slotted energy harvesting point-to-point communications systems in wireless fading channels. The objective is to minimize the competitive rate gap that is defined as the maximum gap between the optimal rates that can be achieved by the offline, and online transmission policies over all possible energy arrival profiles, and fading states. The paper introduces the competitive rate gap analysis, and solves the particular case of two transmission slots. For two time slots, we show that the optimal competitive rate gap is 0.2075 bits/s/Hz, and present a transmission policy that achieves it. The new online policy is shown to outperform previously proposed online policies, such as the myopic policy.","PeriodicalId":211324,"journal":{"name":"2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123957461","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
A novel relay-based interference alignment strategy for multi-user networks 一种基于中继的多用户网络干扰对准策略
2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2015-07-01 DOI: 10.1109/SPAWC.2015.7227114
Yue Tian, M. Beach, A. Nix
{"title":"A novel relay-based interference alignment strategy for multi-user networks","authors":"Yue Tian, M. Beach, A. Nix","doi":"10.1109/SPAWC.2015.7227114","DOIUrl":"https://doi.org/10.1109/SPAWC.2015.7227114","url":null,"abstract":"Interference alignment (IA) is a transmission strategy that use channel state information (CSI) to improve the capacity of multiuser communication systems. However, the performance of IA is always limited by the accuracy of the CSI. In particular, this is a problem in time-varying channels, as the CSI at transmitter (CSIT) may become outdated when the channel is changing quickly. In this study, we propose a novel cooperative relay-based interference alignment (RIA) scheme, which aims to increase the number of Degrees of Freedom (DoF) for the multiuser networks, even when the required source-to-destination CSIT is completely outdated. With the RIA scheme, the DoF region is firstly derived under an ideal CSIT case. Then, the RIA scheme is respectively presented in non-ideal CSIT cases. Furthermore, the achievable DoF regions by RIA in these non-ideal cases are derived. In addition, the trade-off between relay-based and non-relay based IA schemes are analysed.","PeriodicalId":211324,"journal":{"name":"2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130239272","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
Precoding design and user selection for multibeam satellite channels 卫星多波束信道的预编码设计与用户选择
2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2015-06-28 DOI: 10.1109/SPAWC.2015.7227072
A. Gharanjik, B. Shankar, Pantelis-Daniel M. Arapoglou, M. Bengtsson, B. Ottersten
{"title":"Precoding design and user selection for multibeam satellite channels","authors":"A. Gharanjik, B. Shankar, Pantelis-Daniel M. Arapoglou, M. Bengtsson, B. Ottersten","doi":"10.1109/SPAWC.2015.7227072","DOIUrl":"https://doi.org/10.1109/SPAWC.2015.7227072","url":null,"abstract":"Precoding for the downlink of a multibeam satellite system has been recently shown, under ideal conditions, to be promising technique towards employing aggressive frequency reuse gainfully. However, time varying phase uncertainties imposed by the components and the channel, combined with delayed feedback perturbs the channel state information at the transmitter (CSIT). In this paper, we consider a power constrained robust formulation of the downlink precoding problem to counter the phase uncertainties. In particular it considers imposing conditions on the average signal to interference plus noise ratio (SINR), to deal with imperfect CSIT. In addition to the robust formulation, the primacy of user selection is highlighted and a new approach exploiting the satellite system design is proposed. Performance of the derived robust precoder in conjunction with the proposed location based user selection is then evaluated and the gains are tabulated.","PeriodicalId":211324,"journal":{"name":"2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)","volume":"409 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132033305","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: 16
Linear transceiver optimization in multicell MIMO based on the generalized benders decomposition 基于广义弯曲分解的多小区MIMO线性收发优化
2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2015-06-10 DOI: 10.1109/SPAWC.2015.7227074
R. Mochaourab, M. Bengtsson
{"title":"Linear transceiver optimization in multicell MIMO based on the generalized benders decomposition","authors":"R. Mochaourab, M. Bengtsson","doi":"10.1109/SPAWC.2015.7227074","DOIUrl":"https://doi.org/10.1109/SPAWC.2015.7227074","url":null,"abstract":"We study the maximum sum rate optimization problem in the multiple-input multiple-output interfering broadcast channel. The multiple-antenna transmitters and receivers are assumed to have perfect channel state information. In this setting, finding the optimal linear transceiver design is an NP-hard problem. We show that a reformulation of the problem renders the application of generalized Benders decomposition suitable. The decomposition provides us with an optimization structure which we exploit to apply two different optimization approaches. While one approach is guaranteed to converge to a local optimum of the original problem, the other approach hinges on techniques which can be promising for devising a global optimization method.","PeriodicalId":211324,"journal":{"name":"2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122097419","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
Energy-efficient future wireless networks: A marriage between massive MIMO and small cells 节能的未来无线网络:大规模MIMO和小型蜂窝的结合
2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2015-06-02 DOI: 10.1109/SPAWC.2015.7227030
Emil Björnson, L. Sanguinetti, M. Kountouris
{"title":"Energy-efficient future wireless networks: A marriage between massive MIMO and small cells","authors":"Emil Björnson, L. Sanguinetti, M. Kountouris","doi":"10.1109/SPAWC.2015.7227030","DOIUrl":"https://doi.org/10.1109/SPAWC.2015.7227030","url":null,"abstract":"How would a cellular network designed for high energy efficiency look like? To answer this fundamental question, we model cellular networks using stochastic geometry and optimize the energy efficiency with respect to the density of base stations, the number of antennas and users per cell, the transmit power levels, and the pilot reuse. The highest efficiency is neither achieved by a pure small-cell approach, nor by a pure massive MIMO solution. Interestingly, it is the combination of these approaches that provides the highest energy efficiency; small cells contributes by reducing the propagation losses while massive MIMO enables multiplexing of users with controlled interference.","PeriodicalId":211324,"journal":{"name":"2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128104967","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: 24
WMMSE-based multiuser MIMO beamforming: A practice-oriented design and LTE system performance evaluation 基于wmmse的多用户MIMO波束形成:面向实践的设计和LTE系统性能评估
2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2015-06-01 DOI: 10.1109/SPAWC.2015.7227075
Jiaxian Pan, Wing-Kin Ma, Xin Xia, Yuan Tian
{"title":"WMMSE-based multiuser MIMO beamforming: A practice-oriented design and LTE system performance evaluation","authors":"Jiaxian Pan, Wing-Kin Ma, Xin Xia, Yuan Tian","doi":"10.1109/SPAWC.2015.7227075","DOIUrl":"https://doi.org/10.1109/SPAWC.2015.7227075","url":null,"abstract":"This paper deals with the multiuser MIMO downlink beamforming scenario. In this scenario, a popular approach for designing the beamformer is the weighted minimum mean square error (WMMSE) approach for sum rate maximization. This work considers the WMMSE method from an implementation perspective, where we take into account practical factors - such as linear receivers (rather than successive interference cancellation receivers, which are implicitly assumed in some existing works but are more complex to implement) and imperfect channel knowledge at the transmitter - for deployment in systems such as long term evolution (LTE). A modified WMMSE algorithm that incorporates such factors is proposed. We evaluate the performance of the proposed WMMSE algorithm using a time division duplexing (TDD) LTE simulation platform, and show that our practice-oriented design can improve the system throughput by 3 ~ 30% in comparison with the conventional WMMSE algorithm.","PeriodicalId":211324,"journal":{"name":"2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123874318","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
Detection and mitigation of false data injection in cooperative communications 协作通信中虚假数据注入的检测与缓解
2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2015-06-01 DOI: 10.1109/SPAWC.2015.7227052
S. Kim
{"title":"Detection and mitigation of false data injection in cooperative communications","authors":"S. Kim","doi":"10.1109/SPAWC.2015.7227052","DOIUrl":"https://doi.org/10.1109/SPAWC.2015.7227052","url":null,"abstract":"We propose a likelihood ratio based physical-layer technique for detecting and mitigating the false data injection attack in cooperative communication systems. We present the optimum detection method that minimizes the end-to-end outage probability and the minmax detection method that minimizes the maximum possible outage probability under unknown attack probability. We show that the optimum detection technique can provide almost the same end-to-end outage probability that can be provided by the ideal cryptographic technique that perfectly detects the false injection at the expense of high computational cost and bandwidth overhead. The proposed solution can be used as an additional layer of protection or can complement to the conventional cryptographic techniques.","PeriodicalId":211324,"journal":{"name":"2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116344349","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
An innovative interference mitigation approach for high throughput satellite systems 一种创新的高通量卫星系统干扰减缓方法
2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2015-06-01 DOI: 10.1109/SPAWC.2015.7227091
Màrius Caus, A. Pérez-Neira, M. Angelone, A. Ginesi
{"title":"An innovative interference mitigation approach for high throughput satellite systems","authors":"Màrius Caus, A. Pérez-Neira, M. Angelone, A. Ginesi","doi":"10.1109/SPAWC.2015.7227091","DOIUrl":"https://doi.org/10.1109/SPAWC.2015.7227091","url":null,"abstract":"This paper investigates how to boost the forward link capacity in multibeam satellite systems. Since co-channel interference is the main inhibitor to achieve the full potential of frequency reuse, we propose to mitigate the negative impact of interference through cooperative transmission schemes. When desired information is shared among two beams, rates can be assigned to each user independently. This is crucial to benefit from the use of adaptive coding and modulation. In addition, the receiver can resort to multi-user detection, which is proven to give satisfactory performance when several signals are simultaneously received. Numerical results reveal that the proposed cooperative strategy brings substantial improvements, in terms of spectral efficiency, with respect to multibeam satellite systems, where receivers treat the interference as noise and data content is plainly delivered through the corresponding beam.","PeriodicalId":211324,"journal":{"name":"2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)","volume":"31 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133746160","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: 22
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