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The performance of STBC coded MIMO-OFDM system based on turbo product codes

The performance of STBC coded MIMO-OFDM system based on turb...

引用

International Conference on Wireless Communications, Networking and Mobile Computing

作者： He, YJ Zhu, GX Zhang, BJ Zhang, ZM Li, X Huazhong Univ Sci & Technol Dept Elect & Informat Engn Wuhan 430074 Peoples R China

ISBN: (纸本)078039335X

Space-Time Block Codes(STBCs) are designed to obtain the full diversity gain. However, STBCs are not designed to achieve an additional coding gain. Therefore, STBCs need to be concatenated with an outer code which provides a significant coding gain. Turbo Product Codes (TPCs) are a kind of high-efficient coding scheme with low latency decoding, which do not suffer from an error floor associated with turbo codes. This article considers the concatenation of TPCs with STBCs and sets up coded MIMO-OFDM syatem to improve the reliability of the wireless communication systems. Finally, the paper presents simulating environment of experiment testing.

关键词： turbo product codes multiple-input multiple-output space-time block codes OFDM IMT2000

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COMPACT RECONFIGURABLE POLARIZATION PLASMA SQUARE MICROSTRIP PATCH MIMO ANTENNA FOR 5G WIRELESS APPLICATIONS 38

COMPACT RECONFIGURABLE POLARIZATION PLASMA SQUARE MICROSTRIP...

引用

38th National Radio Science Conference (NRSC)

作者： Elgiddawy, Sarah Malhat, Hend A. Zainud-Deen, Saber H. Ibrahim, Ahmed A. Hamed, Hisham Minia Univ Fac Engn Al Minya Egypt Menoufia Univ Fac Elect Engn Shibin Al Kawm Al Minufiyah Egypt Badr Univ Cairo Fac Engn & Technol Badr City Egypt

ISBN: (纸本)9781665418577

This paper proposes a reconfigurable polarization square microstrip patch antenna (SMSPA) using plasma and its multiple-input multiple-output (MIMO) for 5G wireless networks. The SMSPA has two square etched boxes with asymmetric length and positions from the SMSPA center along its diagonal. The single antenna has an overall size of 96 mm x 96 mm x 4.6 mm (0.78 lambda x 0.78 lambda x 0.0377 lambda). The two square boxes length and position are optimized for achieving minimum axial-ratio of 0.608 dB dB at 2.44 GHz. Four polarization cases are achieved, case (1) and case (2) for left-hand and right-hand circular polarization (CP), while case (3) and case (4) for linear polarization. The overall dimensions of the proposed 4-port (2X2) MIMO antenna are 160 mm x 160 mm x 4.6 mm. The proposed MIMO antenna layout guarantee compact size with spacing distance 0.25 lamda (30.5 mm) between MIMO elements with isolation higher than 22.44 dB and an envelope correlation coefficient ECC lower than 0.015 between elements.

关键词： Reconfigurable Antenna microstrip patch antenna Circular Polarization multiple-input multiple-output MIMO

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A Novel Interference Alignment Scheme for Two-Cell MIMO Downlink Channels

A Novel Interference Alignment Scheme for Two-Cell MIMO Down...

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6th International Conference on Ubiquitous and Future Networks (ICUFN)

作者： Guo, Shuaishuai Zhang, Haixia Yuan, Dongfeng Zhao, Feng Shandong Univ Sch Informat Sci & Engn Jinan 250100 Shandong Peoples R China Guilin Univ Elect Technol Sch Informat Sci & Engn Gui Lin Guang Xi Peoples R China

ISBN: (纸本)9781479934942

In this work, we propose a novel interference alignment (IA) scheme for two-cell MIMO downlink channels. With this scheme the interference will be aligned to the same directions with the desired signals when the transmitters are sending out the same symbols, otherwise, the interference will be aligned to the orthogonal directions of the desired signals as the traditional IA scheme does. As a result, it outperforms the traditional IA schemes in terms of capacity and mutual information, which is verified by simulation results. Numerical results also show that the mutual information improvement will decrease as the modulation level goes high.

关键词： Interference Alignment multiple-input multiple-output sum capacity mutual information interference channel

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Distributed Joint Antenna and User Selection for MIMO Broadcast Channels

Distributed Joint Antenna and User Selection for MIMO Broadc...

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IEEE International Conference on Computational Electromagnetics (ICCEM)

作者： Xue, Song Qian, Zuping Shao, Wei Zhong, Wei PLA UST Coll Commun Engn Microwave Commun Dept Nanjing 210007 Jiangsu Peoples R China

ISBN: (纸本)9781467396783

This paper is concerned with distributed joint user and antenna selection strategy for multiple-input multiple-output broadcast channels. Firstly, the selection is formulated as a discrete game in which the users are regarded as game participants. We design a joint selection strategy and the optimal strategy profile which maximizes the sum rate constitutes a pure strategy Nash equilibrium. Then a distributed algorithm is proposed to achieve the Nash equilibrium. The algorithm is proved to converge on a feasible pure strategy Nash equilibrium under destined conditions. Simulation results show that the proposed algorithm, which only requires limited feedback, can achieve near optimal sum rate performance with lower complexity.

关键词： multiple-input multiple-output broadcast channels sum rate game theory nash equilibrium joint selection strategy

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Performance-Complexity Trade-Off for Low-Complexity MIMO Detection: simplified BP vs. EP Receivers 95

Performance-Complexity Trade-Off for Low-Complexity MIMO Det...

引用

IEEE 95th Vehicular Technology Conference: (VTC-Spring)

作者： Mekhiche, Adam Cipriano, Antonio Maria Poulliat, Charly Thales INP Toulouse ENSEEIHT Gennevilliers France Thales Gennevilliers France INP Toulouse ENSEEIHT Toulouse France

ISBN: (数字)9781665482431

ISBN: (纸本)9781665482431

In this study, we intend to make an in-depth investigation of the performance-complexity trade-off of low complexity multiple-input multiple-output (MIMO) signal detection based on message passing algorithms. Several detection algorithms such as Belief Propagation (BP) and Expectation Propagation (EP) have been proposed to approximate symbol Maximum A Posteriori (MAP) for high dimensional signaling. We propose a thorough examination of those algorithms and some of their low-complexity versions, through a complexity/performance trade-off analysis to identify modes of operation depending on the number of antennas and constellation order. Finally, we propose a new simplified BP detection scheme, which combines the advantages of QR precoding and Interference Cancellation (IC).

关键词： multiple-input multiple-output Maximum A Posteriori Belief Propagation Expectation Propagation QR factorisation Parallel Interference Cancellation

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Phased-Array and Radar Astounding Breakthroughs - An Update

Phased-Array and Radar Astounding Breakthroughs - An Update

引用

2008 IEEE Radar Conference

作者： Brookner, Eli Raytheon Company Sudbury MA 01776 United States

ISBN: (纸本)9781424415380

In recent years phased arrays have Seen breakthroughs that lead to capabilities not possible in the Past. This is exemplified by the development of GaAs integrated microwave circuits called monolithic microwave integrated circuits (MMIC). This integration has reached the point where it is possible to now build a low cost 35 GHz phased array for a missile seeker costing $30/element (total cost of array including all electronics divided by number of elements). This is made possible here because integration allows the whole T/R module to be put on a single chip. For some application it will be possible in the near future to put multiple receivers or transmitters on a single chip now. The advances provided by Moore's Law has now made it is feasible to do digital beam forming (DBF) with all its numerous advantages. It is now possible to do DBF for a 2,500 element array at the element level, a major breakthrough. Also covered will be: the potential for GaN and SiC chips which have the capability of a factor of ten or more higher peak power than GaAs chips;arrays with instantaneous bandwidths of up to 33:1;SiGe low cost T/R modules;low cost MEMS passive arrays;a real radar application for multiple-input multiple-output (MEMO) as opposed to fantasy has been demonstrated by Lincoln Lab MIT which allows coherent combining of two radars to achieve a 9 dB increase in sensitivity;MIMO also makes possible the optimum removal of clutter in OTH and airborne radars by permitting adaptive control of the transmit antenna pattern in the receiver.

关键词： Radar active-phased arrays monolithic microwave integrated circuits MMIC MEMS T/R nodule phased array AESA electronic scanning ESA SBX XBR GBR-P AN/APG-79 F/A-18E/F low-cost AESA GaAs GaN SiC SiGe CMOS digital beam forming DBF EL/M-2248 MF-STAR digital signal processing adaptive arrays sidelobe canceler SLC STAP Ultra-Wideband Antenna Space-Based Radar SBR VED tube Vacuum Electron Device traveling wave tube TWT packaging Haystack Radar multiple-input multiple-output MIMO SAR ISAR

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Maximum Ergodic Spectral Efficiency of Reconfigurable Intelligent Surface Assisted MIMO Systems under Correlated Channels 12

Maximum Ergodic Spectral Efficiency of Reconfigurable Intell...

引用

12th International Conference on Wireless Communications and Signal Processing (WCSP)

作者： Wang, Jinghe Wang, Hanqing Han, Yu Jin, Shi Li, Xiao Southeast Univ Natl Mobile Commun Res Lab Nanjing 210096 Peoples R China

ISBN: (纸本)9781728172361

Recent years have witnessed a growing academic interest in reconfigurable intelligent surface (RIS) since it is a promising technology to satisfy the performance requirements of six generation (6G). Works related to the RISs have been studied by numerous researchers, however, almost existing researches mainly focus on RIS-assisted MIMO systems with the assumption of uncorrelated environments. To date, far too little attention has been paid to situations that consider the correlations among the antennas and RIS reflecting elements. Therefore, in this paper, we focus on a RIS-assisted MIMO system under spatially correlated channels. We first analyze the ergodic spectral efficiency of the system and derive the upper bound of it. In particular, we propose an optimal phase shift design to maximize the ergodic spectral efficiency of the system. Numerical results show the effectiveness of our proposed phase shift design.

关键词： Reconfigurable intelligent surface multiple-input multiple-output Spatially correlated channels Ergodic spectral efficiency

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Unscented Kalman Filter-based Beam Tracking in NR MIMO System using Hybrid Beamforming 5

Unscented Kalman Filter-based Beam Tracking in NR MIMO Syste...

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5th International Conference on Artificial Intelligence in Information and Communication (ICAIIC)

作者： Sim, Yuna Sin, Seungseok Cho, Jihun Kim, Kyunam Moon, Sangmi Hwang, Intae Chonnam Natl Univ Dept ICT Convergences Syst Engn Gwangju South Korea Chonnam Natl Univ Dept Elect & Comp Engn Gwangju South Korea Alps Elect Korea Co Ltd Gwangju South Korea Korea Nazarene Univ Dept IT Artificial Intelligence Cheonan South Korea Chonnam Natl Univ Dept Elect Engn Gwangju South Korea

ISBN: (纸本)9781665456456

Unmanned aerial vehicles (UAVs) and millimeter wave frequencies play a key role in supporting 5G wireless communication systems. They expand the area of wireless communication by increasing the data capacity in communication systems and supporting high data rates. However, short wavelengths, due to their high millimeter wave frequencies cause problems arising from signal attenuation and path loss. To address these limitations, research centered on high directional beamforming technology continues to gather interest. Furthermore, due to the mobility of UAVs, it is essential to track the beam angle accurately to obtain full beamforming gain. In this study, we propose a beam tracking method based on the unscented Kalman filter using hybrid beamforming. By expanding analog beamforming to hybrid beamforming, our proposed algorithm can be used even in multi-user and multi-stream environments, increasing the data capacity, and, thus increasing utilization in new radio multiple-input multiple-output orthogonal frequency diversity multiplexing systems.

关键词： Beam tracking hybrid beamforming multiple-input multiple-output orthogonal frequency diversity multiplexing unscented Kalman filter

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Full-Duplex Single-RF MIMO with Coordinate-Interleaved Space-Time Coding 3

Full-Duplex Single-RF MIMO with Coordinate-Interleaved Space...

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3rd IEEE International Conference on Computer and Communications (ICCC)

作者： Zou, Ming Lin, Lifeng Wen, Miaowen Ma, Meng Jiao, Bingli Peking Univ Sch Elect Engn & Comp Sci Beijing Peoples R China Haihua Elect Enterprise China Co Ltd Guangzhou Guangdong Peoples R China South China Univ Technol Sch Elect & Informat Engn Guangzhou Guangdong Peoples R China

ISBN: (纸本)9781509063529

In this paper, we aim at improving the transmission reliability of multiple-input multiple-output (MIMO) enabled full-duplex (FD) system. To this end, we investigate the implementation of coordinate interleaved orthogonal design (CIOD) based space-time block code in bidirectional FD system, and propose a novel scheme named CI-FD. Theoretical analysis proves that this scheme is able to achieve the full diversity gain of the CIOD technique when the self-interference (SI) of the FD system is effectively suppressed, while maintaining the same spectral efficiency and decoding complexity as the original FD system. Moreover, two performance enhancing schemes based on CI-FD are proposed: 1) CI-FD with antenna selection (AS) that further increases the diversity gain, and 2) CI-FD with spatial modulation (SM) that provides an additional spectral efficiency gain. Upper bounds on the average bit error probabilities of the proposed schemes are derived and their error-free information transmission capabilities are also investigated. Simulation results verify our analysis and demonstrate the advantages of the proposed schemes.

关键词： full-duplex multiple-input multiple-output diversity gain coordinate interleaved orthogonal design

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3D Mapping of Surface Profiles by Radar Measurements at E-Band Employing On-Site Near-Field Calibration 25

3D Mapping of Surface Profiles by Radar Measurements at E-Ba...

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24th International Conference on Electromagnetics in Advanced Applications (ICEAA) / 12th IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (IEEE APWC)

作者： Matthias, Linder Schwarz, Dominik Waldschmidt, Christian Ulm Univ Inst Microwave Engn Ulm Germany

ISBN: (纸本)9798350320589

For many applications it is essential to know the exact information about a surface profile or a soil level. For this purpose, a very irregular surface is created with sand, and its surface profile is measured with the aid of a 4-D E-band radar sensor employing a total number of more than 1700 channels. Typically, high-precision in-situ calibrations are employed to ensure the best possible radar performance. Unfortunately, environmental influences, such as the temperature, vary strongly between the initial calibration scenario and the application scenario, making a re-calibration necessary. To ensure the proper operation of the sensor a re-calibration is performed at the exact time and location of application. To be independent of the scene under investigation, the calibration target is placed in the near-field of the sensor and out of the main lobe illuminating the area under test. Furthermore, the calibration in field-trials is performed by means of a calibration target without the need for a precise mechanical placement. Therefore, a highly precise in-situ calibration is used to estimate the position of the calibration target. A field-trial is deployed to show the radar performance with on-site near-field calibration and a comparison to an initial calibration in the far-field of the radar sensor is conducted to demonstrate the compensation of near-field effects on the calibration.

关键词： multiple-input multiple-output calibration Direction-of-Arrival Estimation

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