检索结果-内蒙古大学图书馆

Cyclic-delay time-reversal space-time block codes for single-carrier transmission with frequency-domain decision-feedback equalization

引用

Science China(Information Sciences) 2011年第9期54卷 1905-1915页

作者： FENG Ang,YIN QinYe & WANG HuiMing MOE Key Laboratory for Intelligent Networks and Network Security,Xi’an Jiaotong University,Xi’an 710049,China 1. MOE Key Laboratory for Intelligent Networks and Network Security Xi’an Jiaotong University Xi’an 710049 China

Transmit diversity is an important multiple-input multiple-output (MIMO) approach to improve the transmission reliability;however,it is usually designed with maximum-likelihood *** this paper,we investigate a simple transceiver structure for single-carrier MIMO systems,in which the cyclic-delay time-reversal space-time block code (CDTR-STBC) is employed at the transmitter,and the frequency-domain decision-feedback equalization (FD-DFE) is used at the *** separate the transmit antennas into two groups,and then,encode the groups by STBC and cyclically delay the data streams within each *** processing can mitigate the impact of error-propagation and reduce the signal-to-noise ratio (SNR) loss when FD-DFE is employed,in which SNR is defined as the ratio of the received signal power over the noise power at each receive *** support our proposal,this paper also provides the performance analysis of *** is shown that the proposed scheme can achieve full diversity and full transmission rate for a MIMO system employing arbitrary ***,it has considerable performance improvement over the existing schemes.

关键词： single-carrier frequency-domain equalization cyclic delay space-time block code diversity order

来源：评论

学校读者我要写书评

暂无评论

Novel Classes of Minimal Delay and Low PAPR Rate 1/2 Complex Orthogonal Designs

引用

IEEE TRANSACTIONS ON INFORMATION THEORY 2011年第4期57卷 2254-2262页

作者： Adams, Sarah Spence Davis, James Karst, Nathaniel Murugan, Mathav Kishore Lee, Bryce Crawford, Matthew Greeley, Caitlin Franklin W Olin Coll Engn Needham MA 02492 USA Univ Richmond Richmond VA 23173 USA Cornell Univ Ctr Appl Math Ithaca NY 14850 USA Indian Inst Technol Kharagpur 721302 W Bengal India

Complex orthogonal designs (CODs) of rate 1/2 have been considered recently for use in analog transmissions and as an alternative to maximum rate CODs due to the savings in decoding delay as the number of antennas increases. While algorithms have been developed to show that an upper bound on the minimum decoding delay for rate 1/2 CODs with n = 2m - 1 or n = 2m columns is nu(n) = 2(m-1) or nu(n) = 2(m), depending on the parity of n modulo 8, it remains open to determine the exact minimum delay. This paper shows that this bound nu(n) is also a lower bound on minimum decoding delay for a major class of rate 1/2 CODs, named balanced complex orthogonal designs (BCODs), and that this is the exact minimum decoding delay for most BCODs. These rate 1/2 codes are conjugation-separated and thus permit a linearized description of the transceiver signal. BCODs also display other combinatorial properties that are expected to be useful in implementation, such as having no linear processing. An elegant construction is provided for a class of rate 1/2 CODs that have no zero entries, effectively no irrational coefficients, no linear processing, and have each variable appearing exactly twice per column. The resulting codes meet the aforementioned bound on decoding delay in most cases. This class of CODs will be useful in practice due to their low peak-to-average power ratio (PAPR) and other desirable properties.

关键词： Complex orthogonal design minimum decoding delay multiple-input-multiple-output PAPR space-time block code

来源：评论

学校读者我要写书评

暂无评论

Non-Regenerative Multi-Way Relaying: space-time Analog Network Coding and Repetition

引用

IEEE COMMUNICATIONS LETTERS 2011年第12期15卷 1362-1364页

作者： Amah, Aditya Umbu Tana Klein, Anja Tech Univ Darmstadt Grad Sch Computat Engn Darmstadt Germany Tech Univ Darmstadt Commun Engn Lab D-64283 Darmstadt Germany

In this letter, we investigate non-regenerative multi-way relaying when channel state information is not available at the multi-antenna relay station (RS). For stationary channels, space-time analog network coding (STANC) transmission is applied at the RS. For non-stationary channels, the RS applies repetition transmission. For both transmission schemes, in order to obtain the data streams of the other nodes, each node has to perform three receive processing operations successively: Zero Forcing (ZF) detection, back-propagated self-interference cancellation and joint detection. We assess the achievable sum rate performance of non-regenerative multi-way relaying for the proposed transmission schemes. It is shown that STANC with joint detection outperforms both benchmark transmissions, namely, ZF and Maximisation of Signal to Noise Ratio (MSNR) transceive beamforming with single stream decoding performed at each node. When the channels are non-stationary, the repetition transmission enables the multi-way communication and in medium to high SNR region, it outperforms MSNR.

关键词： Multi-way relaying analog network coding space-time block code

来源：评论

学校读者我要写书评

暂无评论

A Linear Programming Receiver for Blind Detection of Full Rate space-time block codes

引用

IEEE TRANSACTIONS ON SIGNAL PROCESSING 2010年第11期58卷 5819-5834页

作者： Zia, Muhammad Ding, Zhi Univ Calif Davis Dept Elect & Comp Engn Davis CA 95616 USA State Mobile Commun Key Lab SE Univ Nanjing Peoples R China

We present a new approach to the blind detection of full rate space-time block coded transmissions. Our method is based on linear programming and is globally convergent. We exploit the implicit structure of space-time block codes to cast the problem as linear programming to be solved efficiently. Unlike several known methods, the proposed technique is applicable to full-rate space-time block codes such as the popular Alamouti orthogonal code and the quasi-orthogonal space time code. Moreover, we utilize the code structure of these full rate codes to achieve simultaneous detection of all coded data streams without relying on successive schemes that are prone to error propagation. For orthogonal space-time codes, our algorithm allows near maximum likelihood detection of orthogonal codes without channel knowledge. We also can generalize the application of the proposed receiver to be used with nonorthogonal codes. Our proposed algorithm can provide performance competitive with existing techniques without imposing any conditions on the number of receive antennas.

关键词： Blind equalization channel estimation linear programming MIMO system space-time block code

来源：评论

学校读者我要写书评

暂无评论

Performance analysis of variable-power adaptive modulation in space-time block coded MIMO diversity systems

引用

Science China(Information Sciences) 2010年第10期53卷 2106-2115页

作者： YU XiangBin 1,2 & SHI HuiBin 1 1 College of Information Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China 2 National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China 1. College of Information Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 210016 China2. National Mobile Communications Research Laboratory Southeast University Nanjing 210096 China

In this paper, the performance analysis of multi-antenna MIMO systems with variable-power (VP) adaptive modulation and space-time coding is presented. The fading gain value is partitioned into a number of regions by which we decide the transmission power according to the region the fading gain falls in. The optimum fading gain region boundaries (switching thresholds) for maximizing spectrum efficiency (SE) under a target BER and average power constraint are derived. It is shown that the Lagrange multiplier in the constrained SE optimization will be unique if the existence condition for multi-antenna systems is satisfied, and is unique for single antenna systems. A practical iterative calculation method based on Steepest Descent Algorithm for finding the Lagrange multiplier is proposed. With the switching thresholds, the closed-form expressions of the SE and average BER, respectively for VP system and constant-power (CP) system are achieved. Simulation results for SE and average BER are in good agreement with the theory analysis. The results show that VP adaptive modulation with space-time coding provides better SE than the counterpart with CP under a target BER and average power constraint.

关键词： adaptive modulation variable power space-time block code constant power multiple input multiple output (MIMO)

来源：评论

学校读者我要写书评

暂无评论

Performance evaluation of M-BOK based DS-UWB system with space-time block code

引用

IEICE TRANSACTIONS ON COMMUNICATIONS 2006年第6期E89B卷 1935-1938页

作者： Lee, Chul-Seung You, Young-Hwan Song, Hyoung-Kyu Sejong Univ uT Commun Res Inst Seoul South Korea

In this letter, we evaluate the M-BOK based DS-UWB system that uses a space-time block code (STBC) with Rake receivers in the WPAN environment. The conventional DS-UWB system doesn't ensure receiver reliability for the WPAN envrionment due to multipath fading, while the proposed M-BOK based DS-UWB system employing a STBC can overcome multipath fading causing attenuation of receiver reliability in the WPAN environment. In addition, a simple diversity combining receiver, called PRake receiver, shows the performance similar to that of a ARake receiver using the ideal diversity combining and reduces the receiver complexity.

关键词： DS-UWB space-time block code rake receiver CAZAC

来源：评论

学校读者我要写书评

暂无评论

A full-diversity full-rate space-time block code design for three transmit antennas

引用

IEICE TRANSACTIONS ON COMMUNICATIONS 2006年第4期E89B卷 1430-1432页

作者： Nam, SH Chung, J Hwang, CS Samsung Adv Inst Technol Commun Lab Suwon South Korea Inha Univ Sch Elect Engn Inchon 402751 South Korea

A design of non-orthogonal 3 x 3 space-time block code (STBC) is proposed. The proposed design achieves full rate, full level diversity, and maximum coding gain by symbol rotation (SR) method. In addition, the proposed scheme has lower encoding complexity than the unitary constellation-rotation (CR) STBC, while two methods exhibit the same bit error rate (BER) performance in Rayleigh fading channel.

关键词： space-time block code diversity coding gain symbol rotation

来源：评论

学校读者我要写书评

暂无评论

Multi-User Relaying of High-Rate space-time code in Cooperative Networks

引用

WIRELESS PERSONAL COMMUNICATIONS 2010年第1期54卷 69-81页

作者： Bhatnagar, Manav R. Arti, M. K. Hjorungnes, Are Bose, Ranjan Song, Lingyang Univ Oslo UNIK Univ Grad Ctr N-2027 Kjeller Norway Indian Inst Technol Delhi Dept Elect Engn New Delhi 110016 India

In this paper, we propose high-rate space-time coding for cooperative wireless networks to reduce the overall delay incurred in relaying signals to multiple receivers. The relay structure is optimized in order to achieve maximum SNR at the receiver nodes. The proposed scheme provides a significant reduction in the delay required for the relaying and transmission of the signals to the multiple receivers with a minute loss in performance. We have also shown by simulation that this loss in the performance could be recovered by selecting more number of relays. We propose two relaying strategies for high-rate space-time codes, which are very useful in providing high data-rate in wireless cooperative networks.

关键词： High-rate code space-time block code Cooperative network

来源：评论

学校读者我要写书评

暂无评论

A Simple Precoding-Based Blind Channel Estimation for space-time block-coded Single-Carrier With Frequency-Domain Equalization Systems

引用

IEEE TRANSACTIONS ON SIGNAL PROCESSING 2010年第10期58卷 5430-5437页

作者： Chen, Yi-Sheng Feng Chia Univ Dept Commun Engn Taichung 40724 Taiwan

We propose a blind channel estimation method for space-time block-coded single-carrier with frequency-domain equalization (SC-FDE) systems based on a simple, nonredundant precoding. This method of precoding allows us to better structure the relation between the covariance matrices of the received data and the products of channel coefficients. Using this structure, we can easily obtain the products of channel coefficients by using only subtraction and division. Then each of the two channel impulse response vectors is obtained by computing the eigenvector that is associated with the maximal eigenvalue of a Hermitian matrix formed from the corresponding products of channel coefficients. The proposed framework guarantees the unique recovery of all the products of channel coefficients for colored or white noise cases. The impact of the precoding on channel estimation and equalization is also discussed. Simulations are used to demonstrate the performance of the proposed method.

关键词： Blind estimation cyclic prefix frequency-domain equalization nonredundant precoding single carrier space-time block code

来源：评论

学校读者我要写书评

暂无评论

Advanced MIMO STBC Adaptive Array with PSAM in Fast Fading Channel

引用

IEICE TRANSACTIONS ON COMMUNICATIONS 2010年第3期E93B卷 660-669页

作者： Sasaki, Susumu Annanab, Supawan Taniguchi, Tetsuki Karasawa, Yoshio Univ Electrocommun Adv Wireless Commun Res Ctr AWCC Chofu Tokyo 1828585 Japan

We provide an efficient transmission scheme which embeds a pilot signal in the data signal for channel state information (CSI) based on the configuration of a multiple-input multiple-output (MIMO) system using space-time block coding (STBC) with an adaptive array (AA) A computer simulation and analysis show that the proposed scheme, which combines the advantage of an Alamouti-like STBC scheme and the pilot-based AA can suppress the irreducible error due to random FM noise The proposed scheme using a pilot minimizes the decoding delay, and is highly robust against fast fading. We show that the proposed scheme can significantly increase the data transmission rate by using the transmitter diversity based on STBC. and the accuracy of the proposed technique is exemplified by a computer simulation

关键词： MIMO space-time block code fast fading Doppler spread adaptive beam-forming adaptive algorithm

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：