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Performance of PTS-Based Firefly Algorithm Scheme for PAPR Reduction in SFBC MIMO-OFDM Communication Systems

Performance of PTS-Based Firefly Algorithm Scheme for PAPR R...

引用

International Symposium on Computer, Consumer and Control

作者： Ho-Lung Hung Yung-Fa Huang Ching-Chuan Wei Rung-Ching Chen Dept. of Inf. & Network Commun. Chienkuo Technol. Univ. Changhua Taiwan Dept. of Inf. & Commun. Eng. Chaoyang Univ. of Technol. Taichung Taiwan Dept. of Inf. Manage. Chaoyang Univ. of Technol. Taichung Taiwan

ISBN: (纸本)9781509030729

A combination of multiple-input multiple output (MIMO) signal processing with orthogonal frequency division multiplexing (OFDM) is regarded as a promising solution for enhancing the performance of next generation wireless local area network (WLAN) systems. However, like OFDM, one main disadvantage of MIMO-OFDM is that the signals transmitted on different antennas might exhibit a prohibitively large peak-to-average power ratio (PAPR). Partial transmit sequence (PTS) provides attractive PAPR reduction performance in OFDM or MIMO-OFDM. Unfortunately, it leads to prohibitively large computational complexity. In this paper, types of low-complexity PTS schemes are proposed to reduce the PAPR for MIMO-OFDM systems that use Firefly algorithm (FA) and space-frequency block codes (SFBC). Simulation results show that FA based on PTS can reduce computational complexity dramatically and achieve better PAPR reduction performance compared to ordinary PTS.

关键词： multiple-input multiple-output Partial transmit sequence Firefly algorithm Peak-to-average power ratio

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Performance Results of Space-time Block Coding Over Nakagami-m Fading Channels

Performance Results of Space-time Block Coding Over Nakagami...

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2005年无线通信、网络和移动计算国际会议

作者： Xudong Wang Dianwu Yue Bin Lin Yu Gong National Key Laboratory of Antenna and Microwave Technology Xidian University Xi'an 710071 China College of Information Engineering Dalian Maritime University Dalian 116026 China

ISBN: (纸本)078039335X

We study the performance of space-time block coding in terms of different transmission matrices over Nakagami-m fading channels in multiple-input multiple-output (MIMO) environments. A closed-form expression for the exact symbol error rate (SER) of orthogonal space-time block coding (OSTBC) over independent identically distributed Nakagami-m fading channels can be derived by means of the equivalent single-input single-output (SISO) model. The exact SERs of OSTBC with M-PSK and M-QAM modulations are expressed in terms of the moment generating function (MGF) of instantaneous SNR as well as the higher transcendental functions. In this paper, we provide performance evaluation results of several codes of OSTBC with the closed-form expressions;also, Monte Carlo simulation results are given, which demonstrate the accuracy of closed-form solutions. In addition, some new observations on the performance results of different code matrices are made.

关键词： MIMO systems Monte Carlo methods Nakagami channels block codes channel coding error statistics method of moments space-time codes Monte Carlo simulation Nakagami-m fading channels moment generating function multiple-input multiple-output orthogonal space multiple input multiple output systems Monte Carlo technique Block codes space time block coding Nakagami channels Moment generating function space-time codes Channel coding METHOD OF MOMENTS Fading channels

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IMPROVED INTERFERENCE AWARE PRECODING FOR CELLULAR NETWORK-MIMO SYSTEMS

IMPROVED INTERFERENCE AWARE PRECODING FOR CELLULAR NETWORK-M...

引用

European Signal Processing Conference

作者： Juan Jose Garcia Fernandez Maximo Morales Cespedes Matilde Sanchez Fernandez Ana Garcia Armada Department of Signal Theory and Communications Universidad Carlos III de Madrid

ISBN: (纸本)9781479946037

An interference aware precoding scheme based on limited channel state information at the transmitter (CSIT) is considered for its use in the downlink of a cellular system. The transmitter precoder used is based on an MMSE-ZF criterion in order to maximize the user rate while the interference to other users is reduced. The proposed scheme also exploits the network topology, so that each BS can categorize the users into two groups, according to the level of interference that the BS is introducing in those users. On the receiver end, each user makes use of the whole channel state information at the receiver (CSIR) by employing an MMSE filter. This approach enables a reduction in the complexity of the system, while improving the performance of the whole network.

关键词： multiple-input multiple-output Interference Aware Channel State Information MMSE ZF

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Iterative Detection Scheme for Turbo-BLAST System with Adaptive Power Allocation in the Presence of Channel State Information Imperfection

Iterative Detection Scheme for Turbo-BLAST System with Adapt...

引用

2012 International Conference on Nano Materials and Electric Devices(ICNMED 2012)

作者： Xiaomin Chen Xiaodan Yu Wei Tan Xiangbin Yu College of Electronic and Information Engineering Nanjing University of Aeronautics and Astronautics

We propose an iterative detection scheme for Turbo-BLAST system with optimal power allocation in the presence of channel state information imperfection. The proposed scheme uses the channel estimation matrix for detection and treats the interference caused by channel estimation errors and additive white Gaussian noise as equivalent noise where the channel estimation matrix and the statistical characteristic of channel estimation errors are necessitated. Simulation results show the proposed algorithm is effective to improve bit error rate(BER) performance through iterative detection for modified Turbo-BLAST system with optimal power allocation in the presence of imperfect channel state information.

关键词： multiple-input multiple-output Iterative detection scheme Transmit Power Allocation Turbo-BLAST Imperfect-Channel State Information(I-CSI)

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CLOSED EXPRESSIONS FOR THE OUTAGE PERFORMANCE OF DISTRIBUTED TRANSMIT-RECEIVE DIVERSITY SYSTEM

CLOSED EXPRESSIONS FOR THE OUTAGE PERFORMANCE OF DISTRIBUTED...

引用

IET International Conference on Information and Communications Technologies

作者： Lei Li Dong-mei Hu Xiao-dong Wang Information Technology Office Nanhai Fleet Command Naval Force of the PLA Zhanjiang China|c|

ISBN: (纸本)9781629931357

Outage performance of distributed transmit-receive diversity system subjected to composite Rayleigh-Lognormal fading channel is considered. Using random Wishart matrix theory and Gauss-Hermite quadrature, we derived closed form expressions for its outage probability. The theoretical expressions are validated by numerical results. It is show that distributed transmit-receive system promise significant diversity gains over collocated multiple antenna system.

关键词： Distributed antenna system Rayleigh-Lognormal fading multiple-input multiple-output Transmit-Receive Diversity Outage performance

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A near-optimal detector for spatial modulation MIMO systems

A near-optimal detector for spatial modulation MIMO systems

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International Symposium on Circuits and Systems

作者： Gwang-Ho Lee Hye-Yeon Yun Tae-Hwan Kim School of Electronics and Information Engineering Korea Aerospace University Hanggongdaehak-ro 76 Deogyang-gu Goyang-si Gyeonggi-do Rep. Korea

ISBN: (纸本)9781479953424

This paper presents a hardware implementation of a detector for spatial modulation multiple-input multiple-output (SM-MIMO) communication systems. The proposed detector employs the signal-vector-based list detection method, but the original method is modified to realize a low-complexity implementation. In addition, the proposed detector is designed based on the dual data path architecture, in which antenna selection and the symbol detection are performed separately with different precision in order to reduce the hardware complexity while achieving a near-optimal error-rate performance. The proposed detector is implemented with 87.4K logic gates in a 0.18-um CMOS technology, and its throughput is 858 Mbps for 8 × 4 64 QAM SM-MIMO systems when the operating frequency is 286 MHz.

关键词： wireless communications multiple-input multiple-output spatial modulation symbol detection VLSI signal-vector-based list detection

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Water-filling Power Allocation Scheme for Turbo-BLAST System with Imperfect Channel State Information

Water-filling Power Allocation Scheme for Turbo-BLAST System...

引用

2011 4th IEEE International Symposium on Microwave,Antenna,Propagation and EMC Technologies for Wireless Communications

作者： Xiao-min Chen, Xiang-bin Yu, Qiu-ming Zhu, Da-zhuan Xu College of Electronic and Information Engineering Nanjing University of Aeronautics &Astronautics Nanjing, China

We propose a water-filling power allocation scheme for Turbo-BLAST system in the presence of channel state information *** to the total transmit power constraint,the water-filling rule is used to allocate proper power for every sub-channel in order to improve channel capacity performance based on the imperfect channel state *** results show that the proposed algorithm is effective for Turbo-BLAST system to improve channel capacity performance especially in the lower signal noise ratio region and/or large antenna systems in the presence of channel state information imperfection.

关键词： multiple-input multiple-output Turbo-BLAST Water-filling Power Allocation Imperfect Channel State Information

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Subspace-based Blind Channel Estimation for MIMO-CPSC Systems with Repetition Scheme

Subspace-based Blind Channel Estimation for MIMO-CPSC System...

引用

2010 3rd IEEE International Conference on Computer Science and Information Technology—ICCSIT 2010

作者： Hao Lihong,Li Guangjun,Guo Zhiyong School of Communication & Information Engineering University of Electronic Science and Technology of China Chengdu,China

multiple-input multiple-output(MIMO) technology can be used in cyclic prefix single carrier(CPSC) systems to improve communication quality and *** paper proposes a blind channel estimation method for MIMO-CPSC systems with repetition *** algorithm makes use of the redundancy introduced by the repetition scheme at the transmitter to identify the channel based on a subspace ***,the proposed method obtains accurate channel estimation with fewer received *** numerical results are provided to illustrate the effectiveness of the proposed blind channel estimation method.

关键词： multiple-input multiple-output blind channel estimation cyclic prefix single carrier subspace repetition

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Towards the Secrecy Outage Probability of Transmit-Receive Diversity Systems in the Presence of Multiantenna Eavesdroppers

Towards the Secrecy Outage Probability of Transmit-Receive D...

引用

作者： Piriya Wangnilrat Kiattisak Maichalernnukul College of Digital Innovation and Information Technology Rangsit University

We analyze the information-theoretic security of transmit-receive diversity systems in the presence of multiantenna eavesdroppers. Specifically, exact and asymptotic closed-form expressions are derived for the secrecy outage probability of such systems in a Rayleigh fading environment. Based on the latter expression, the corresponding secrecy diversity order and secrecy array gain are determined. Numerical results are presented to verify the analytical results and to investigate the impact of various system parameters, including the antenna configuration and the number of eavesdroppers.

关键词： multiple-input multiple-output transmit-receive diversity secrecy outage probability

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Three-dimensional Space-Time Shift Keying with Coordinate Combination and Joint Optimisation

Three-dimensional Space-Time Shift Keying with Coordinate Co...

引用

IEEE/CIC International Conference on Communications in China

作者： Guangtao Zheng Ming Jiang Sun Yat-sen University Guangzhou China

ISBN: (纸本)9781509002443

In this paper, the concept of three-dimensional (3-D) space-time shift keying (STSK) is introduced, which incorporates 3-D constellations into conventional STSK systems. The new 3-D STSK techniques enjoy better error resilience than their two-dimensional (2-D) counterparts. Firstly, based on different sampling rates, two three-dimensional (3-D) STSK schemes referred to as R2 3-D STSK and R3 3-D STSK, respectively, are proposed. Both schemes show improved effective spectral efficiency (ESE) than 2-D STSK at relatively low signal-to-noise ratios (SNRs). Further, the optimal combinations of the constellation coordinates for R2 3-D STSK are derived by maximising the minimal determinant of the so-called difference matrices, yielding a better system performance. In addition, a joint optimisation mechanism utilising the simplified conjugate gradient (SCG) algorithm is devised for 3-D STSK, aiming for further enhancing the achievable system performance. Finally, extensive simulation results are provided to demonstrate the benefits of the proposed schemes, exhibiting the design tradeoffs concerning date rate, link robustness and computational complexity.

关键词： Three-dimensional constellation space-time shift keying multiple-input multiple-output coordinate combination joint optimisation multiple input multiple output systems shift keying System performance Three Dimensions CONSTELLATIONS space time frequency shift keying error-resilience Coordinates

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