检索结果-内蒙古大学图书馆

12th IEEE International Conference on Signal Processing (ICSP)

作者： Cheng, Pu Wang, Zhan Xin, Qin He, Mi Natl Univ Def Technol Coll Elect Sci & Engn Changsha Hunan Peoples R China Third Mil Med Univ Sch Biomed Engn Chongqing Peoples R China

ISBN: (纸本)9781479921867

A novel scheme of the Frequency-Modulated Continuous-Wave Synthetic Aperture Radar (FMCW SAR) with multiple orthogonal transmitted waveforms is introduced in this paper. Based on the Interleaved Orthogonal Frequency Division multiplex (I-OFDM) principle, the transmit waveform successfully combines the advantages of the linear frequency modulated waveform and the OFDM waveform. This maintains FMCW SAR system smart and miniature, with lower cross correlation and higher coherence. Instead of band pass filter for traditional frequency division waveform, the division of the novel waveform is performed efficiently by the demodulation using discrete Fourier transform. At last, to verify the novel scheme, a simulation of imaging of one point is performed with two transmit waveform.

关键词： Frequency-Modulated Continuous-Wave radar multiple-input multiple-output Orthogonal Waveform Design Interleaved OFDM Synthetic Aperture Radar

来源：评论

学校读者我要写书评

暂无评论

Optimal Phase Control for Joint Transmission and Reception with Beamforming

Optimal Phase Control for Joint Transmission and Reception w...

引用

33rd IEEE International Performance, Computing, and Communications Conference (IPCCC)

作者： Kim, Seonghyun Lee, Hojae Kwon, Beom Lee, Inwoong Lee, Sanghoon Yonsei Univ Dept Elect & Elect Engn Seoul 120749 South Korea

ISBN: (纸本)9781479975754

In this paper, we propose a joint transmission and reception with phase control for beamforming in a multi-cell environment. For generated transmit weight vectors of multiple base stations (BSs), a mobile station (MS) calculates phases to maximize an achievable rate with low rate feedback. By using the phases, the multiple transmit weight vectors are coordinated to improve the signal to noise ratio (SNR). In order to find optimal phases, we present a phase control method for the effective channel via geometrical approach.

关键词： multiple-input multiple-output joint transmission and reception phase control

来源：评论

学校读者我要写书评

暂无评论

Performance Analysis of Sub-optimal Transmit and Receive Antenna Selection Strategies in Single Relay Based DF Cooperative MIMO Networks

Performance Analysis of Sub-optimal Transmit and Receive Ant...

引用

20th National Conference on Communications (NCC)

作者： Krishna, Vemuri Sai Bhatnagar, Manav R. Indian Inst Technol Delhi Bharti Sch Telecomm Tech & Mgmt New Delhi 110016 India Indian Inst Technol Delhi Dept Elect Engn New Delhi 110016 India

ISBN: (纸本)9781479923618

In this paper, we analyze the performance of two sub-optimal antenna selection strategies for single relay based selective decode-and-forward (DF) cooperative multiple-input multiple-output (MIMO) systems. We assume that the source-relay, relay-destination, and the source-destination channels follow the Rayleigh fading. We derive the closed-form expressions and the upper bounds of the symbol error rate (SER) for selective DF cooperative MIMO systems employing M-ary phase shift keying in both the antenna selection strategies. From the derived SER upper bounds, we extract the diversity orders of the system in both the selection strategies. The optimal power allocation for the source and relay is derived in both the selection strategies, which minimize the SER of DF cooperative MIMO system.

关键词： Antenna selection cooperative relay networks decode-and-forward relaying multiple-input multiple-output M-ary phase-shift keying

来源：评论

学校读者我要写书评

暂无评论

A Full Rate, New Families of General Complex Orthogonal Space-Time Block Code for 6 and 8-Antennas

A Full Rate, New Families of General Complex Orthogonal Spac...

引用

31st National Radio Science Conference (NRSC)

作者： Khaled, Adel M. Ghuniem, Atef M. Soliman, Heba Y. Suez Univ Fac Engn Suez Egypt Suez Canal Univ Fac Engn Ismailia Egypt Port Said Univ Fac Engn Port Said Egypt

ISBN: (纸本)9781479938209

Space-time block codes (STBCs) from orthogonal designs have attracted considerable attention due to their fast maximum-likelihood (ML) decoding and full diversity. A full rate (R=1) is achieved for 3 and 4 antennas using "triple QPSK" for complex (STBCs). This paper proposes a family of new space-time block codes (STBC) for 6 transmit antennas that achieves full rate. This paper also proposes a modified QPSK constellation scheme that can achieve the full rate for both 6 and 8 transmit antennas.

关键词： multiple-input multiple-output MIMO Space-Time Block Code STBC complex orthogonal designs Modified QPSK

来源：评论

学校读者我要写书评

暂无评论

A Simple Decision-Feedback Block Differential Detection Scheme for DSTBC 79

A Simple Decision-Feedback Block Differential Detection Sche...

引用

IEEE 79th Vehicular Technology Conference (VTC-Spring)

作者： Kubo, Hiroshi Ritsumeikan Univ Fac Sci & Engn Dept Elect & Comp Engn Kusatsu Siga 5258577 Japan

ISBN: (纸本)9781479944828

For differential space-time block coding (DSTBC), this paper proposes a simple decision-feedback block differential detection (DFBDD) scheme with small computational complexity, in order to improve tracking capability on fast time-varying fading channels. Decisions can be derived directly without computation of metrics in the proposed DFBDD. It can also employ higher-order channel prediction, which needs neither complex trellis search algorithms nor complex channel prediction recursive algorithms. Finally, computer simulation results confirm that the proposed DFBDD with higher-order channel prediction has higher tracking capability at low computational complexity than the conventional block differential detection without channel prediction.

关键词： multiple-input multiple-output differential space-time coding decision-feedback higher-order channel prediction fast time-varying fading

来源：评论

学校读者我要写书评

暂无评论

Near-Optimal Power Allocation with PSO Algorithm for MIMO Cognitive Networks using multiple AF Two-Way Relays

Near-Optimal Power Allocation with PSO Algorithm for MIMO Co...

引用

IEEE International Conference on Communications (ICC)

作者： Alsharoa, Ahmad Ghazzai, Hakim Alouini, Mohamed-Slim KAUST Comp Elect & Math Sci Engn CEMSE Div Thuwal Makkah Province Saudi Arabia

ISBN: (纸本)9781479920037

In this paper, the problem of power allocation for a multiple-input multiple-output two-way system is investigated in underlay Cognitive Radio (CR) set-up. In the CR underlay mode, secondary users are allowed to exploit the spectrum allocated to primary users in an opportunistic manner by respecting a tolerated temperature limit. The secondary networks employ an amplify-and-forward two-way relaying technique in order to maximize the sum rate under power budget and interference constraints. In this context, we formulate an optimization problem that is solved in two steps. First, we derive a closed-form expression of the optimal power allocated to terminals. Then, we employ a strong optimization tool based on particle swarm optimization algorithm to find the power allocated to secondary relays. Simulation results demonstrate the efficiency of the proposed solution and analyze the impact of some system parameters on the achieved performance.

关键词： multiple-input multiple-output two-way cognitive radio particle swarm optimization

来源：评论

学校读者我要写书评

暂无评论

Efficient Adaptive Equalization of Doubly Dispersive Channels in MIMO-FBMC/OQAM Systems 11

Efficient Adaptive Equalization of Doubly Dispersive Channel...

引用

11th IEEE International Symposium on Wireless Communications Systems (ISWCS)

作者： Mavrokefalidis, C. Rontogiannis, A. Kofidis, E. Beikos, A. Theodoridis, S. Comp Technol Inst & Press Diophantus Patras Greece Natl Observ Athens IAASARS GR-15236 Penteli Greece Univ Piraeus Dept Stat & Insurance Sci Piraeus Greece Univ Athens Dept Informat & Telecommun Athens Greece

ISBN: (纸本)9781479958634

The problem of adaptively equalizing doubly dispersive MIMO channels for FBMC/OQAM systems is studied in this paper. The challenges in this type of multicarrier systems include their intrinsic self-interference and the need to cope with time-and frequency-selective subchannels in realistic propagation conditions. An efficient and numerically stable algorithm is adopted, relying on a decision feedback structure that implements BLAST ordering for the input signals recovery. The ability of this algorithm to address the above challenges has been demonstrated. The focus of this paper is on reducing the needs of this equalizer in training information. A channel estimate-based (re-)initialization scheme is developed and shown to be quite effective in lowering the training overhead, at an affordable additional cost in complexity. For the sake of comparison, the MIMO-OFDM problem is also studied. Simulation results for practical scenarios demonstrate the effectiveness of the proposed approach.

关键词： Decision feedback equalization filter bank based multicarrier multiple-input multiple-output orthogonal frequency division multiplexing offset quadrature amplitude modulation recursive least squares

来源：评论

学校读者我要写书评

暂无评论

Capacity Maximization in Wireless MIMO Networks with Receiver-Side Interference Suppression 14

Capacity Maximization in Wireless MIMO Networks with Receive...

引用

15th ACM International Symposium on Mobile Ad Hoc Networking and Computing

作者： Wan, Peng-Jun Xu, Boliu Frieder, Ophir Ji, Sai Wang, Baowei Xu, Xiaohua IIT Dept Comp Sci Chicago IL 60616 USA Georgetown Univ Dept Comp Sci Washington DC 20057 USA Nanjing Univ IST Coll Comp & Software Nanjing 210044 Jiangsu Peoples R China Univ Toledo EECS Dept Toledo OH 43606 USA

ISBN: (纸本)9781450326209

multiple-input multiple-output (MIMO) technology provides a means of boosting network capacity without requiring additional spectrum. It has received widespread attention over the past decade from both industry and academic researchers,no w forming a key component of nearly all emerging wireless standards. Despite the huge promise and considerable attention,a rigorous algorithm-theoretic framework for maximizing network capacity in multihop wireless MIMO networks is missing in the state of the art. The existing algorithms and protocols for maximizing network capacity in multihop wireless MIMO networks are purely heuristic without any provable performance guarantees. In this paper we conduct a comprehensive algorithm study for maximizing network capacity in multihop wireless MIMO networks with receiver-side interference suppression,including the full characterization of NP-hardness and APX-hardness, the polynomial time approximation schemes,and the practical approximation algorithms with provable performance guarantees.

关键词： Capacity multiple-input multiple-output stream scheduling

来源：评论

学校读者我要写书评

暂无评论

Hybrid Two-Stage Decision-Feedback Equalization for Single-Carrier multiple-input multiple-output Systems

引用

IEICE TRANSACTIONS ON COMMUNICATIONS 2009年第7期E92B卷 2503-2506页

作者： Feng, Ang Yin, Qinye Fan, Jiancun Xi An Jiao Tong Univ Elect & Informat Engn Dept Xian 710049 Peoples R China

A single-carrier multiple-input multiple-output (MIMO) system with frequency-selective channels suffers from the inter-symbol interference (ISI) and the co-channel interference (CCI). To eliminate both type of interference, we propose in this letter a hybrid two-stage decision-feedback equalizer (HTS-DFE), which performs the frequency-domain equalization (FIDE) in the first stage and the layered serial interference-cancellation (SIC) in the second stage. Since the decision-feedback (DF) or noise-prediction (NP) architecture can be employed in FIDE or SIC, the proposed equalizer actually can have four variations that achieve the same mean square error (MSE) under the assumption of perfect feedback. Further, we combine HTS-DFE with the decoded decision-feedback (131317) scheme to mitigate the error-propagation encountered in the practice. Simulation results confirm that the proposed HTS-DFE can outperform the existing equalizers significantly.

关键词： single-carrier multiple-input multiple-output noise prediction decision-feedback equalization

来源：评论

学校读者我要写书评

暂无评论

Image reconstruction and compressive sensing in MIMO radar

Image reconstruction and compressive sensing in MIMO radar

引用

Conference on Radar Sensor Technology XVIII

作者： Sun, Bing Lopez, Juan Qiao, Zhijun Univ Texas Pan Amer Dept Math 1201 West Univ Dr Edinburg TX 78539 USA Beihang Univ Sch Elect & Informat Engn Beijing 100191 Peoples R China Univ Texas Pan Amer Dept Math Edinburg TX 78539 USA

ISBN: (纸本)9781628410143

multiple-input multiple-output (MIMO) radar utilizes the flexible configuration of transmitting and receiving antennas to construct images of target scenes. Because of the target scenes' sparsity, the compressive sensing (CS) technique can be used to realize a feasible reconstruction of the target scenes from undersampling data. This paper presents the signal model of MIMO radar and derive the corresponding CS measurement matrix, which shows success of the CS technique. Also the basis pursuit method and total-variation minimization method are adopted for different scenes' recovery. Numerical simulations are provided to illustrate the validity of reconstruction for one dimensional and two dimensional scenes.

关键词： multiple-input multiple-output compressive sensing basis pursuit total-variation minimization

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：