2018 IEEE 19th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)最新文献_第4页

Optimal Resource Allocation for Non-Regenerative Multiway Relaying with Rate Splitting 带速率分裂的非再生多路中继的最优资源分配

2018 IEEE 19th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2018-06-01 DOI: 10.1109/SPAWC.2018.8445862

Bho Matthiesen, Eduard Axel Jorswieck

{"title":"Optimal Resource Allocation for Non-Regenerative Multiway Relaying with Rate Splitting","authors":"Bho Matthiesen, Eduard Axel Jorswieck","doi":"10.1109/SPAWC.2018.8445862","DOIUrl":"https://doi.org/10.1109/SPAWC.2018.8445862","url":null,"abstract":"Optimal resource allocation in interference networks requires the solution of non-convex optimization problems. Except from treating interference as noise (IAN) one usually has to optimize jointly over the achievable rates and transmit powers. This non-convexity is normally only due to the transmit powers while the rates are linear. Conventional approaches like the Polyblock Algorithm treat all variables equally and, thus, require a two layer solver to exploit the linearity in the rates and keep the computational complexity at a reasonable level. In this paper, we develop a branch and bound algorithm that exploits most of the problem structure and, compared to previous algorithms, has significantly better performance, improved numerical stability and provides a feasible solution even if terminated prematurely. We employ this novel algorithm to study throughput optimal power allocation in a multi-way relay channel with simultaneous non-unique decoding (SND) and rate splitting (RS) encoders. We evaluate the performance gains of RS over “pure” SND and IAN numerically. While SND often achieves significantly higher throughput than IAN, the benefits of rate splitting are not that pronounced on average and largely depend on the channel condition.","PeriodicalId":240036,"journal":{"name":"2018 IEEE 19th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)","volume":"135 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131820860","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

Energy-Efficient UAV Deployment with Flexible Functional Split Selection 具有灵活功能拆分选择的高效节能无人机部署

2018 IEEE 19th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2018-06-01 DOI: 10.1109/SPAWC.2018.8445959

Liumeng Wang, Sheng Zhou

引用次数: 11

Symbol-Level Precoding with Low Resolution DACs for Large-Scale Array MU-MIMO Systems 大规模阵列MU-MIMO系统的低分辨率dac符号级预编码

2018 IEEE 19th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2018-06-01 DOI: 10.1109/SPAWC.2018.8445995

C. Tsinos, A. Kalantari, S. Chatzinotas, B. Ottersten

{"title":"Symbol-Level Precoding with Low Resolution DACs for Large-Scale Array MU-MIMO Systems","authors":"C. Tsinos, A. Kalantari, S. Chatzinotas, B. Ottersten","doi":"10.1109/SPAWC.2018.8445995","DOIUrl":"https://doi.org/10.1109/SPAWC.2018.8445995","url":null,"abstract":"While (Multiple Input-Multiple Output) MIMO systems based on large-scale antenna arrays are seen as the solution to the continuously increasing demands in modern wireless systems, they require high hardware complexity and power consumption. To tackle this, solutions based on low resolution Analog-to-Digital Converters (ADCs) / Digital-to-Analog Converters (DACs) have been developed in the literature where they mainly propose quantized versions of typical channel dependent linear precoding solutions. Alternatively, nonlinear Symbol level Precoding techniques have been recently proposed for downlink Multi User (MU)-MIMO systems with low resolution DACs that achieve significantly improved performance in several cases. The existing SLP approaches support only DACs of 1-bit resolution which result in significant performance degradations, especially when constellations with order greater than 4 are employed. To that end, in this work a novel SLP approach is developed that supports systems with DACs of any resolution and it is applicable for any type of constellation. As it is verified by the presented numerical results, the proposed approach exhibits significantly improved performance when constellations with order greater than 4 are employed and require reduced computational complexity, compared to the existing solutions for the 1-bit DAC case.","PeriodicalId":240036,"journal":{"name":"2018 IEEE 19th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130351246","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: 14

Analysis of the Viterbi Algorithm Using Tropical Algebra and Geometry 利用热带代数和几何分析Viterbi算法

2018 IEEE 19th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2018-06-01 DOI: 10.1109/SPAWC.2018.8445777

Emmanouil Theodosis, P. Maragos

引用次数: 10

MMSE Precoding for Receive Spatial Modulation in Large MIMO Systems 大型MIMO系统中接收空间调制的MMSE预编码

2018 IEEE 19th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2018-06-01 DOI: 10.1109/SPAWC.2018.8445854

Ahmed Raafat, A. Agustin, J. Vidal

引用次数: 5

Impact of Channel Models on the End-to-End Performance of Mmwave Cellular Networks 信道模型对毫米波蜂窝网络端到端性能的影响

2018 IEEE 19th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2018-06-01 DOI: 10.1109/SPAWC.2018.8445856

Michele Polese, M. Zorzi

引用次数: 18

Massive MIMO mmWave Channel Estimation Using Approximate Message Passing and Laplacian Prior 基于近似消息传递和拉普拉斯先验的海量MIMO毫米波信道估计

2018 IEEE 19th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2018-06-01 DOI: 10.1109/SPAWC.2018.8446036

F. Bellili, Foad Sohrabi, Wei Yu

{"title":"Massive MIMO mmWave Channel Estimation Using Approximate Message Passing and Laplacian Prior","authors":"F. Bellili, Foad Sohrabi, Wei Yu","doi":"10.1109/SPAWC.2018.8446036","DOIUrl":"https://doi.org/10.1109/SPAWC.2018.8446036","url":null,"abstract":"This paper tackles the problem of channel estimation in mmWave large-scale communication systems. To leverage the sparsity of mmWave MIMO channels in the beam domain, we use discrete Fourier transform (DFT) precoding and combining and recast the channel estimation problem as a compressed sensing (CS) problem. The generalized approximate message passing (GAMP) algorithm is then used to find the minimum mean square estimate (MMSE) of each entry of the unknown mmWave MIMO channel matrix. Unlike the existing works, this paper models the angular-domain channel coefficients by a Laplacian prior and accordingly establishes the closed-form expressions for all the statistical quantities that need to be updated iteratively by GAMP. Further, to render the proposed algorithm fully automated, we develop an expectation-maximization (EM)-based procedure which can be readily embedded within GAMP's iteration loop in order to learn the unknown scale parameter of the underlying Laplacian prior along with the noise variance. Numerical results indicate that the proposed EM-GAMP algorithm under a Laplacian prior yields substantial improvements both in terms of channel estimation accuracy and computational complexity as compared to the existing methods that advocate a Gaussian mixture (GM) prior.","PeriodicalId":240036,"journal":{"name":"2018 IEEE 19th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)","volume":"0 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121875435","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

Coherent Detector for Pseudo-FSK Backscatter Under Ambient Constant Envelope Illumination 环境恒定包络光照下伪fsk后向散射相干检测器

2018 IEEE 19th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2018-06-01 DOI: 10.1109/SPAWC.2018.8445935

G. Vougioukas, Panos N. Alevizos, A. Bletsas

{"title":"Coherent Detector for Pseudo-FSK Backscatter Under Ambient Constant Envelope Illumination","authors":"G. Vougioukas, Panos N. Alevizos, A. Bletsas","doi":"10.1109/SPAWC.2018.8445935","DOIUrl":"https://doi.org/10.1109/SPAWC.2018.8445935","url":null,"abstract":"This work studies ambient backscatter, where the tag utilizes a frequency-shifted form of on-off keying (OOK), which may be coined as pseudo-frequency shift keying (pseudo-FSK). Such scheme, offers the possibility of simple, frequency-domain multiple access (due to FSK), by appropriate selection of the switching frequencies among (possibly receiverless) tags, while reserving bandwidth (due to OOK). A constant envelope-modulated ambient signal is assumed to illuminate the tag, resembling signals from (analog) FM radio, (digital) minimum-shift keying (MSK), or phase-shift keying (PSK) broadcasting stations. Fully coherent, maximum likelihood (ML) detection is derived for tag information, without estimating or detecting the ambient signal; instead, the law of large numbers is exploited, in conjunction with channel estimation techniques, even though the ambient unknown signal changes between successive tag bits. Closed-form expression for the probability of error is also given and simulations verify theoretical results. Ambient is a special case of bistatic backscatter; thus, useful design principles for ambient systems can stem from the bistatic backscatter literature.","PeriodicalId":240036,"journal":{"name":"2018 IEEE 19th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123935094","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

Seismic Signal Compression Through Delay Compensated and Entropy Constrained Dictionary Learning 基于延迟补偿和熵约束字典学习的地震信号压缩

2018 IEEE 19th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2018-06-01 DOI: 10.1109/SPAWC.2018.8446034

Xin Tian, A. Abdi, E. Liu, F. Fekri

引用次数: 2

Effective Capacity Based Resource Allocation for Rayleigh-Fading Parallel Channels 基于容量的瑞利衰落并行信道资源有效分配

2018 IEEE 19th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2018-06-01 DOI: 10.1109/SPAWC.2018.8445897

P. Ciblat, I. Stupia, L. Vandendorpe

引用次数: 2