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

Hybrid beamforming with finite-resolution phase shifters for large-scale MIMO systems 大规模MIMO系统有限分辨率移相器混合波束形成

2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2015-08-31 DOI: 10.1109/SPAWC.2015.7227015

Foad Sohrabi, Wei Yu

{"title":"Hybrid beamforming with finite-resolution phase shifters for large-scale MIMO systems","authors":"Foad Sohrabi, Wei Yu","doi":"10.1109/SPAWC.2015.7227015","DOIUrl":"https://doi.org/10.1109/SPAWC.2015.7227015","url":null,"abstract":"In large-scale multiple-input multiple-output (MIMO) systems, high cost and high power consumption of RF chains typically prohibit the use of traditional baseband beamforming which requires one distinct radio-frequency (RF) chain per antenna. One possible architecture to reduce the number of RF chains is hybrid beamforming in which the overall beamformer consists of a concatenation of an analog RF beamformer implemented using phase shifters (PSs) and a low-dimensional baseband digital beamformer. However, conventional hybrid beamforming designs require high-resolution PSs, which are expensive. In this paper, we consider transceiver design for maximizing the spectral efficiency of a large-scale MIMO system with hybrid beamforming architecture where only finite-resolution PSs are available at both ends. We propose a heuristic transceiver design for the critical case where the number of RF chains is equal to the number of data streams. We show that the proposed hybrid beamforming design can achieve a rate close to that of optimal exhaustive search. We also suggest how to generalize the algorithm for the setting where the number of RF chains exceeds the number of data streams. We show that the generalized algorithm can use the extra RF chains to significantly improve the system performance in the case of low-resolution PSs.","PeriodicalId":211324,"journal":{"name":"2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)","volume":"115 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":"124805863","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

On the physical layer security of analog joint source channel coding schemes 模拟联合源信道编码方案的物理层安全性研究

2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2015-08-31 DOI: 10.1109/SPAWC.2015.7227105

E. Hodgson, G. Brante, R. Souza, J. L. Rebelatto

引用次数: 4

Sending Gaussian multiterminal sources over the Gaussian MAC with bandwidth expansion 在带宽扩展的高斯MAC上发送高斯多终端源

2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2015-08-31 DOI: 10.1109/SPAWC.2015.7227109

N. Jiang, Yang Yang, A. Høst-Madsen, Zixiang Xiong

引用次数: 0

On the distributed approaches with imperfect channel estimation for MIMO interference channel MIMO干扰信道中不完全信道估计的分布式方法研究

2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2015-08-31 DOI: 10.1109/SPAWC.2015.7227070

S. Smirani, A. Saadani, Yuan-Wu Yi

引用次数: 2

A general analysis of cyclic block transmultiplexers with cyclic convolution 基于循环卷积的循环分组复用器的一般分析

2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2015-08-31 DOI: 10.1109/SPAWC.2015.7227009

D. Pinchon, P. Siohan

引用次数: 2

Multiuser MIMO precoding with per-antenna continuous-time constant-envelope constraints 具有每个天线连续时间恒定包络约束的多用户MIMO预编码

2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2015-08-31 DOI: 10.1109/SPAWC.2015.7227040

Christopher Mollén, E. Larsson

引用次数: 7

1-bit direction of arrival estimation based on Compressed Sensing 基于压缩感知的1位到达方向估计

2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2015-08-31 DOI: 10.1109/SPAWC.2015.7227037

Christoph Stöckle, Jawad Munir, A. Mezghani, J. Nossek

引用次数: 47

Uplink-downlink channel transformation using an adaptive Kalman filter for multicarrier systems 多载波系统中基于自适应卡尔曼滤波的上行下行信道变换

2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2015-08-31 DOI: 10.1109/SPAWC.2015.7227081

Behailu Y. Shikur, T. Weber

{"title":"Uplink-downlink channel transformation using an adaptive Kalman filter for multicarrier systems","authors":"Behailu Y. Shikur, T. Weber","doi":"10.1109/SPAWC.2015.7227081","DOIUrl":"https://doi.org/10.1109/SPAWC.2015.7227081","url":null,"abstract":"In this paper, we consider uplink-downlink transformation of the channel transfer function in frequency division duplex multicarrier systems with time-varying frequency-selective mobile radio channels. The uplink-downlink transformation shall be performed at the base station by exploiting the current uplink and delayed downlink measurements. Based on a physically motivated geometric channel model, where different plane waves are assumed to superpose at the receiver antenna, the uplink-downlink transformation problem is shown to be a linear estimation problem. We propose a Kalman filter based uplink-downlink transformation algorithm. Commonly, the parameters of the Kalman filter, e.g., the state transition matrix, are obtained by using the channel autocorrelation matrix from stochastic channel models, e.g., the Jakes' fading model with truncated one-sided exponential power delay profile. However, the stochastic process for many channels of interest is not ergodic. Thus these stochastic channel models do not describe the statistics for a single realization. We thus propose to use these stochastic channel models for initialization only and then to periodically update the parameters of the Kalman filter by using the estimated channel coefficients. This results in an adaptive Kalman filter based uplink-downlink transformation algorithm. Performance of the proposed algorithm is assessed using Monte Carlo simulations.","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":"114372698","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

Nonlinear spatiotemporal channel gain map tracking in mobile cooperative networks 移动合作网络中非线性时空信道增益图跟踪

2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2015-08-31 DOI: 10.1109/SPAWC.2015.7227120

Dionysios S. Kalogerias, A. Petropulu

引用次数: 2

Dual Polarized Modulation and receivers for mobile communications in urban areas 用于城市地区移动通信的双极化调制和接收器

2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2015-08-31 DOI: 10.1109/SPAWC.2015.7226998

P. Henarejos, A. Pérez-Neira

{"title":"Dual Polarized Modulation and receivers for mobile communications in urban areas","authors":"P. Henarejos, A. Pérez-Neira","doi":"10.1109/SPAWC.2015.7226998","DOIUrl":"https://doi.org/10.1109/SPAWC.2015.7226998","url":null,"abstract":"Achieving an increase in the spectral efficiency (SE) has always been a major driver in the design of communication systems. The use of MIMO techniques in mobile communications has achieved significant benefits in improving the system throughput. The basic underlying concept of MIMO is to exploit the signal and channel characteristics to eliminate interference between multiple transmissions. Departing from the work carried out under the industrial projects in the works of Henarejos et al. (2013), we extend the results provided in their respective reports. The goal is to increase the SE without an increment of radiated energy without any Channel State Information at Transmitter (CSIT) and feedback at the transmitter and maintaining a very low computational complexity at the receiver. Although a priori additional power is required to increase the SE, we demonstrate that the proposed Polarized Modulation (PMod) scheme exploits the polarization diversity reducing the required EbN0 and adding an extra bit. We also introduce two receivers to demodulate this scheme of different computational complexities. We describe a Near Optimal Detector (NOD) which achieves almost the same performance as the optimal detector based on the Maximum Likelihood Detection (MLD), but with lower computational complexity. Finally, the results demonstrate that the PMod requires less EbN0 compared with the single polarization case, guarantees the robustness in the presence of the cross-polarization and validates that PMod can multiplex two streams of different Quality of Service (QoS).","PeriodicalId":211324,"journal":{"name":"2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)","volume":"21 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":"129565939","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: 7