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16th IEEE International Conference on Communication Systems (IEEE ICCS)

作者： Shen, Di Gao, Zhenzhen Liao, Xuewen Sun, Xiaodong Xi An Jiao Tong Univ Sch Elect & Informat Engn Xian 710049 Shaanxi Peoples R China Xian Polytech Univ Sch Elect & Informat Xian 710048 Shaanxi Peoples R China

ISBN: (纸本)9781538678640

In this paper, we consider the security issue of multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing with index modulation (OFDM-IM) systems with a passive multiple-antenna eavesdropper. A physical-layer security scheme based on quadrature spatial modulation (QSM) and artificial noise (AN) is proposed to resist eavesdropping while maintaining the same receiver as the conventional OFDM-IM at the destination. By exploiting the structure of QSM, the generated OFDM-IM symbols are split into two orthogonal parts, and precoded ANs are injected into each part to produce combined symbols for transmission. Secrecy rate of the proposed secure MIMO OFDM-IM is derived and evaluated through numerical simulations. Compared to the existing secure OFDM-IM scheme, the proposed secure MIMO OFDM-IM shows better security against eavesdropping, especially when the eavesdropping channel is correlated to the legitimate channel.

关键词： Physical layer security index modulation orthogonal frequency division multiplexing multiple-input multiple-output

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IMPLEMENTATION OF PHYSICAL LAYER SECURITY FOR multiple-input, multiple-output COMMUNICATIONS VIA A WAVELET PACKET MODULATED SOFTWARE-DEFINED RADIO SYSTEM WITH NOISE MASKING

IMPLEMENTATION OF PHYSICAL LAYER SECURITY FOR MULTIPLE-INPUT...

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作者： Baker, Kyle A. Naval Postgraduate School

学位级别：硕士

This thesis discusses the theory, design, and implementation of a physical layer security (PLS) system on a multiple-input, multiple-output (MIMO) software defined radio (SDR) with wavelet packet modulation (WPM). The PLS implementation leverages channel state information, gained via channel reciprocity, and applies it to an artificial noise masking algorithm formulated for MIMO SDR systems. The masking algorithm is realized with static elements as well as random elements that could prevent an adversary from estimating the additive mask components. Over-the-air testing provides evidence that the artificial noise mask is effective at obscuring a transmitted signal from an eavesdropper while remaining transparent to the intended receiver. Bit error rate calculations are performed for varied signal-to-mask ratio and LOS vs. BLOS conditions.

关键词： software-defined radio SDR wavelet packet modulation WPM space-time block coding STBC Alamouti encoding multiple-input multiple-output MIMO physical layer security noise masking channel state information CSI channel reciprocity

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multiple-input multiple-output visible light communication system based on disorder dispersion components

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OPTICAL ENGINEERING 2017年第10期56卷 106109-106109页

作者： Yang, Tao Zhang, Qi Hao, Yue Zhou, Xin-hui Yi, Ming-dong Wei, Wei Huang, Wei Li, Xing-ao Nanjing Univ Posts & Telecommun Key Lab Organ Elect & Informat Displays Synerget Innovat Ctr Organ Elect & Informat Displ Nanjing Jiangsu Peoples R China

A multiple-input multiple-output visible light communication (VLC) system based on disorder dispersion components is presented. Instead of monochromatic sources and large size photodetectors used in the traditional VLC systems, broadband sources with different spectra act as the transmitters and a compact imaging chip sensor accompanied by a disorder dispersion component and a calculating component serve as the receivers in the proposed system. This system has the merits of small size, more channels, simple structure, easy integration, and low cost. Simultaneously, the broadband sources are suitable to act as illumination sources for their white color. A regularized procedure is designed to solve a matrix equation for decoding the signals at the receivers. A proof-of-concept experiment using on-off keying modulation has been done to prove the feasibility of the design. The experimental results show that the signals decoded by the receivers fit well with those generated from the transmitters, but the bit error ratio is increased with the number of the signal channels. The experimental results can be further improved using a high-speed charge-coupled device, decreasing noises, and increasing the distance between the transmitters and the receivers. (C) 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)

关键词： multiple-input multiple-output visible light communication regularization algorithm

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A NOISE-MASKING PHYSICAL LAYER SECURITY METHOD FOR multiple-input, multiple-output DIGITAL COMMUNICATION SYSTEMS

A NOISE-MASKING PHYSICAL LAYER SECURITY METHOD FOR MULTIPLE-...

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作者： Robert C. Sellin Naval Postgraduate School

学位级别：硕士

In this thesis, we develop a method of using a noise-masking system to increase the security in a multiple- input, multiple-output communication system by using known channel-state information to calculate a specific masking signal for each block of a space-time block-coded signal. This masking signal is invisible to the intended receiver since it is designed to cancel out within the equalization process. Using mathematical analysis and numerical simulation of the communication system, we find that it is possible to design an effective security system by employing this method. Finally, we extend this insight to a communication system involving wavelet packet modulation and find that this masking method can be adjusted to this more complicated system.

关键词： noise masking wavelet packet modulation WPM multiple-input multiple-output MIMO Alamouti space-time block code STBC channel state information CSI

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Hybrid space-frequency domain pre-equalization for DC-biased optical orthogonal frequency division multiplexing based imaging multiple-input multiple-output visible light communication systems

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OPTICAL ENGINEERING 2017年第3期56卷 036102-036102页

作者： Chen, Chen Zhong, Wen-De Nanyang Technol Univ Sch Elect & Elect Engn Singapore Singapore

We propose a hybrid space-frequency domain pre-equalization technique for indoor multiple-input multiple-output visible light communication (MIMO-VLC) systems using DC-biased optical orthogonal frequency division multiplexing with an imaging receiver. The proposed hybrid space-frequency domain pre-equalization is jointly performed in both space and frequency domains for the purpose of achieving comparable signal-to-noise ratio performances of different channels in an imaging MIMO-VLC system. It is shown by the simulation results that a four-channel imaging MIMO-VLC system with a raw data rate of 1.2 Gb/s using hybrid space-frequency domain pre-equalization achieves significantly improved bit error rate performance than the system using only frequency domain pre-equalization, resulting in up to 52.6% improvement in communication coverage area at a target BER of 10(-3). (C) 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)

关键词： visible light communication multiple-input multiple-output orthogonal frequency division multiplexing pre-equalization communication coverage

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Ergodic channel capacity of spatial correlated multiple-input multiple-output free space optical links using multipulse pulse-position modulation

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OPTICAL ENGINEERING 2017年第2期56卷 026103-026103页

作者： Wang, Huiqin Wang, Xue Cao, Minghua Lanzhou Univ Technol Sch Comp & Commun Lanzhou Peoples R China

The spatial correlation extensively exists in the multiple-input multiple-output (MIMO) free space optical (FSO) communication systems due to the channel fading and the antenna space limitation. Wilkinson's method was utilized to investigate the impact of spatial correlation on the MIMO FSO communication system employing multipulse pulse-position modulation. Simulation results show that the existence of spatial correlation reduces the ergodic channel capacity, and the reception diversity is more competent to resist this kind of performance degradation. (C) 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)

关键词： free space optical multiple-input multiple-output spatial correlation multipulse pulse-position modulation ergodic channel capacity

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Perfect orthogonal waveform scheme used for high-resolution multiple-input multiple-output synthetic aperture radar system

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JOURNAL OF APPLIED REMOTE SENSING 2016年第3期10卷

作者： Li, Shufeng Jin, Libiao Commun Univ China Sch Informat & Engn Dingfuzhuang East St 1 Beijing 100024 Peoples R China

We investigate multiple-input multiple-output (MIMO) synthetic aperture radar (SAR) scheme with an ultra-low side-lobe ratio performance for using complete complementary sequences (CCS) waveform. It is shown that the CCS can be applied in a MIMO SAR system to obtain high resolution in range direction. In addition, the azimuth channel scheme with the multiple subsequences of CCS is also considered. First, we introduce the concept of CCS and establish the transmitter model based on CCS in MIMO SAR system. Then, we propose the corresponding imaging algorithm for employing the CCS to accurately focus the raw data of the MIMO SAR system and derive the range cell migration correction. Considering the signal complexity, we make use of the CCS pairs to analyze the MIMO SAR imaging algorithm. Finally, simulation results demonstrate the validity and feasibility of the proposed MIMO SAR scheme and the potential advantage of CCS. (C) 2016 Society of Photo-Optical Instrumentation Engineers (SPIE)

关键词： multiple-input multiple-output imaging algorithm complete complementary sequence

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multiple-input multiple-output synthetic aperture radar antenna arrangement for wide-swath remote sensing

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JOURNAL OF APPLIED REMOTE SENSING 2015年第1期9卷 094097-1-094097-18页

作者： Shao, Huaizong Wang, Wen-Qin Univ Elect Sci & Technol China Sch Commun & Informat Engn High Tech Sect Chengdu 611731 Peoples R China

Simultaneous high-resolution and wide-swath (HRWS) remote sensing imaging is of great importance in future microwave remote sensing, but it is limited by the minimum antenna area constraint. multiple-input multiple-output (MIMO) synthetic aperture radar (SAR) offers new opportunities due to its increased degrees of freedom and system flexibility. We investigate four elevation MIMO SAR antenna arrangements, namely narrow-beam transmission narrow-beam reception, narrow-beam transmission wide-beam reception, wide-beam transmission narrow-beam reception, and wide-beam transmission wide-beam reception (WTWR) in HRWS remote sensing. Their signal models, system gains and range ambiguity-to-signal ratio performances are comparatively investigated. Three waveforms that have a large time-bandwidth product and constant modulus are designed for the MIMO SAR system and the impacts of their mutual interferences due to imperfect waveform orthogonality are also simulated. Simulation results show that MIMO SAR is superior to conventional single-antenna SAR and existing multichannel SAR techniques in wide-swath remote sensing. (C) 2015 Society of Photo-Optical Instrumentation Engineers (SPIE)

关键词： multiple-input multiple-output wide-swath high-resolution wide-swath high-resolution synthetic aperture radar (SAR) multichannel SAR waveform diversity

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Hybrid digital-analog video transmission in wireless multicast and multiple-input multiple-output system

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JOURNAL OF ELECTRONIC IMAGING 2016年第1期25卷 013006-013006页

作者： Liu, Yu Lin, Xiaocheng Fan, Nianfei Zhang, Lin Beijing Univ Posts & Telecommun Minist Educ PRC Key Lab Univ Wireless Commun 10 Xitucheng Rd Beijing 100876 Peoples R China

Wireless video multicast has become one of the key technologies in wireless applications. But the main challenge of conventional wireless video multicast, i.e., the cliff effect, remains unsolved. To overcome the cliff effect, a hybrid digital-analog (HDA) video transmission framework based on SoftCast, which transmits the digital bitstream with the quantization residuals, is proposed. With an effective power allocation algorithm and appropriate parameter settings, the residual gains can be maximized;meanwhile, the digital bitstream can assure transmission of a basic video to the multicast receiver group. In the multiple-input multiple-output (MIMO) system, since nonuniform noise interference on different antennas can be regarded as the cliff effect problem, ParCast, which is a variation of SoftCast, is also applied to video transmission to solve it. The HDA scheme with corresponding power allocation algorithms is also applied to improve video performance. Simulations show that the proposed HDA scheme can overcome the cliff effect completely with the transmission of residuals. What is more, it outperforms the compared WSVC scheme by more than 2 dB when transmitting under the same bandwidth, and it can further improve performance by nearly 8 dB in MIMO when compared with the ParCast scheme. (C) The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

关键词： hybrid digital-analog SoftCast ParCast H.264/AVC multicast multiple-input multiple-output

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Signal Processing for a multiple-input, multiple-output (MIMO) Video Synthetic Aperture Radar (SAR) with Beat Frequency Division Frequency-Modulated Continuous Wave (FMCW)

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REMOTE SENSING 2017年第5期9卷 491-491页

作者： Kim, Seok Yu, Jiwoong Jeon, Se-Yeon Dewantari, Aulia Ka, Min-Ho Yonsei Univ Sch Integrated Technol Seoul 21983 South Korea Hanwha Syst Inc Yongin 17121 Gyeonggi Do South Korea

In this paper, we present a novel signal processing method for video synthetic aperture radar (ViSAR) systems, which are suitable for operation in unmanned aerial vehicle (UAV) environments. The technique improves aspects of the system's performance, such as the frame rate and image size of the synthetic aperture radar (SAR) video. The new ViSAR system is based on a frequency-modulated continuous wave (FMCW) SAR structure that is combined with multiple-input multiple-output (MIMO) technology, and multi-channel azimuth processing techniques. FMCW technology is advantageous for use in low cost, small size, and lightweight systems, like small UAVs. MIMO technology is utilized for increasing the equivalent number of receiving channels in the azimuthal direction, and reducing aperture size. This effective increase is achieved using a co-array concept by means of beat frequency division (BFD) FMCW. A multi-channel azimuth processing technique is used for improving the frame rate and image size of SAR video, by suppressing the azimuth ambiguities in the receiving channels. This paper also provides analyses of the frame rate and image size of SAR video of ViSAR systems. The performance of the proposed system is evaluated using an exemplary system. The results of analyses are presented, and their validity is verified using numerical simulations.

关键词： video synthetic aperture radar multiple-input multiple-output multi-channel azimuth processing frequency-modulated continuous waveform beat frequency division polar format algorithm

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