Description: This paper deals with the following issue in space time block coding (STBC) design: over a time selective channel,which scheme performs better, orthogonal STBC (O-STBC) or non-orthogonal STBC (NO-STBC)? It is shown that under time-selectiveness, once the vehicle speed has risen above certain value, NO-STBC always outperforms O-STBC - across the whole SNR range. Also, considering that all the existing NO-STBC schemes have been investigated under quasi-static channels only, a new simple receiver was derived for the NO-STBC system under time-selective channels. Platform: |
Size: 201728 |
Author:hela chaieb |
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Description: 本书是“移动通信前沿技术系列”之一，全书共分18个章节，主要对协作通信及网络知识作了介绍，具体内容包括空时分集和编码、空时频分集与空时频编码、中继信道及协议、单中继协作通信、多节点协作通信等。全书内容分为三部分，第一部分回顾传统的MIMO系统，介绍空间、时间、频率分集的概念。第二部分主要考虑协作通信物理层的关键问题，并对其提出了行之有效的解决方案，比如针对协作通信的分布式特点，提出分布式空时(频)码；针对协作通信的频谱效率问题，提出了新颖和有效的协作方案。第三部分介绍协作通信对物理层之上的MAC层、网络层及应用层产生的影响，内容涉及如何协作路由，如何通过协作使网络覆盖范围增大，如何延长网络寿命等。-This book is one of the "cutting edge mobile communication technology series". The book is divided into 18 chapters, mainly on cooperative communications and network knowledge and specific content including the empty hours of collection and coding, space-time-frequency diversity and space-time frequency coding, relay channel and protocols, single-relay cooperative communication, multi-node cooperative communications. Platform: |
Size: 4773888 |
Author:郑永钊 |
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Description: In this paper, we study a decode-and-forward twoway
relaying network. We propose an opportunistic two-way
relaying (O-TR) scheme based on joint network coding and
opportunistic relaying. In the proposed scheme, one single “best
relay” is selected by MaxMin criterion to perform network
coding on two decoded symbols sent from two sources, and then
to broadcast the network-coded symbols back to the two sources.
The performance of the proposed scheme is analyzed, and verified
throughMonte Carlo simulations. Results show that the proposed
scheme achieves a better performance compared to the fullydistributed
space-time two-way relaying (FDST-TR), which has
been identified as the best decode-and-forward two-way relaying
method so far. Platform: |
Size: 319488 |
Author:陈鹏 |
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Description: 有关超宽带多发多收（MIMO）系统的经典书籍。-Up-to-date coverage of the cutting-edge research on UWB Systems with Multiple Antennas In this book, the authors investigate the benefits of combining UWB and MIMO technologies highlighting five aspects of this promising research field: channel capacity, space-time coding, beamforming and localization, time-reversal transmission, and UWB-MIMO relay. Platform: |
Size: 2144256 |
Author:hujun |
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Description: In this paper, we propose a distributed Alamouti
space-time code (DASTC) for two-way relay networks employing
a single amplify-and-forward (AF) relay. We first derive closedform
expressions for the approximated average sum-rate of
the proposed DASTC scheme. Our analysis is validated by
a comparison against the results of Monte-Carlo simulations.
Numerical results verify the effectiveness of our proposed scheme
over the conventional DASTC with one-way communication. Platform: |
Size: 225280 |
Author:Hakim |
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Description: In this letter, we consider a half-duplex amplify-andforward two-way relaying network consisting of two sources with each having a single antenna and one relay having two antennas.
For such a system, a distributed orthogonal space-time block code (STBC) is proposed by making use of the Alamouti coding
scheme and jointly processing the signals the two antennas at the relay node. Such a code turns out to make the equivalent channel at each source node be a product of the two Alamouti
channels and thus, is called distributed concatenated Alamouti STBC.-In this letter, we consider a half-duplex amplify-andforward two-way relaying network consisting of two sources with each having a single antenna and one relay having two antennas.
For such a system, a distributed orthogonal space-time block code (STBC) is proposed by making use of the Alamouti coding
scheme and jointly processing the signals the two antennas at the relay node. Such a code turns out to make the equivalent channel at each source node be a product of the two Alamouti
channels and thus, is called distributed concatenated Alamouti STBC. Platform: |
Size: 162816 |
Author:Hakim |
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Search - space time relay