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Ordered Iterative Successive Interference Cancellation Algorithm for Large MIMO Detection

Ordered Iterative Successive Interference Cancellation Algor...

引用

IEEE International Conference on Signal Processing, Informatics, Communication and Energy Systems (SPICES)

作者： Mandloi, Manish Bhatia, Vimal Indian Inst Technol Discipline Elect Engn Indore 452017 Madhya Pradesh India

ISBN: (纸本)9781479918232

In this paper, we propose an Iterative Successive Interference Cancellation (ISIC) method for detecting the symbol vector in large MIMO systems. The minimum mean squared error (MMSE) estimate of the received symbol vector are used as an initial solution in ISIC algorithm. We then propose an ordered ISIC (OISIC) algorithm which uses the log likelihood ratio (LLR) based ordering in the detection sequence. The bit error rate (BER) performance of ISIC and OISIC algorithms is simulated for different antenna configurations in MIMO system. Simulation results show that OISIC algorithm outperforms MMSE and successive interference cancellation (SIC) based detection algorithms. Furthermore, the performance of the proposed algorithm improves with increase in antennas and approaches towards single-input single-output (SISO) additive white Gaussian noise (AWGN) performance which proves the effectiveness of OISIC algorithm for large MIMO systems.

关键词： multiple-input multiple-output minimum mean squared error successive interference cancellation

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Pilot Symbol Assisted Channel Estimation for 4x4 Space Time Block Coded Spatial Modulation Systems

Pilot Symbol Assisted Channel Estimation for 4x4 Space Time ...

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IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (PACRIM)

作者： Acar, Yusuf Dogan, Hakan Panayirci, Erdal Istanbul Kultur Univ Dept Elect Engn TR-34156 Istanbul Turkey Istanbul Univ Dept Elect & Elect Engn TR-34320 Istanbul Turkey Kadir Has Univ Dept Elect & Elect Engn TR-34083 Istanbul Turkey

ISBN: (纸本)9781467377881

Recently, spatial modulation (SM) and space-time block coding (STBC) are combined to take advantage of the benefits of both while avoiding their drawbacks for multiple-input and multiple-output (MIMO) systems. The pioneering works on STBC-SM assume that perfect knowledge of the channel fading coefficients is available at the receiver. This work(1) addresses the challenging and timely problem of channel estimation for 4 x 4 STBC-SM systems in the presence of time-varying channels. In this paper, the estimation of channel at pilot durations is done by least square (LS) method and then the channel interpolation is performed by linear interpolation or nearest neighbor interpolation algorithms. Simulation results have demonstrated that the proposed channel estimation based on the linear interpolation offer substantial performance gains over the channel estimation based on the nearest neighbor interpolation. In particular, a savings of about 5dB is obtained at BER = 10(-5), as compared with the nearest interpolation based receiver at 120km/h for 4 x 4 STBC-SM systems with the binary phase shift keying (BPSK) modulation.

关键词： Spatial Modulation Space-Time Block Coding Pilot Symbol Assisted Channel Estimation multiple-input multiple-output Time Varying Channels

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MIMO and Bistatic Architectures for Along Track Interferometry

MIMO and Bistatic Architectures for Along Track Interferomet...

引用

IEEE International Radar Conference (RadarCon)

作者： Thomas, Daniel D. SRC Inc North Syracuse NY USA

ISBN: (纸本)9781479982325

Along track interferometry is predicated on using multiple two-way phase centers to form images from the same spatial aperture at different times. A simple, conventional approach uses subarrays on receive to achieve the multiple two-way phase centers. This corresponds to a single-input, multiple-output (SIMO) architecture. We can, however, take advantage of subarrays on transmit in a multiple-input, single-output (MISO) or multiple-input, multiple-output (MIMO) architecture. Moreover, we can envision the use of multiple, physically separated arrays in various bistatic configurations. This paper analyzes these architectures and configurations to show their differences, advantages, disadvantages, and limitations.

关键词： Along track interferometry bistatic multiple-input multiple-output two-way phase center synthetic aperture radar

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A 3D GBSM for High-Speed Train Communication Systems Under Deep Cutting Scenarios

A 3D GBSM for High-Speed Train Communication Systems Under D...

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International Workshop on High Mobility Wireless Communications (HMWC)

作者： Feng, Liu Fan, Pingzhi Wang, Chengxiang Ghazal, Ammar Southwest Jiaotong Univ Inst Mobile Commun Chengdu Peoples R China Heriot Watt Univ Sch Engn & Phys Sci Inst Sensors Signal & Syst Edinburgh EH14 4AS Midlothian Scotland

ISBN: (纸本)9781467376280

This paper proposes a novel three-dimensional (3D) cylinder geometry-based stochastic model (GBSM) for non-isotropic multiple-input multiple-output (MIMO) Rice fading channels in high-speed train (HST) wireless communications under deep cutting scenarios. Using a validated approximation, the closed-form expression of the space-time correlation function (ST CF) of the proposed GBSM is obtained. Different from two-dimensional (2D) channel models, in the 3D GBSM the elevation angles and the height of the base station (BS) antenna relative to the mobile station (MS) one are introduced. The numerical results show the rationality of the approximation and how the arrangements of antennas affect the ST CF.

关键词： Three dimensional cylinder model cutting scenario channel modeling high speed railway multiple-input multiple-output

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The performance of space shift keying for free-space optical communications over turbulent channels 9

The performance of space shift keying for free-space optical...

引用

Conference on Broadband Access Communication Technologies IX

作者： Abaza, Mohamed Mesleh, Raed Mansour, Ali Aggoune, El-Hadi M. Univ Tabuk Dept Elect Engn Tabuk 71491 Saudi Arabia Univ Tabuk SNCS Res Ctr Tabuk 71491 Saudi Arabia ENSTA Bretagne Lab STICC F-29806 Brest 9 France

ISBN: (纸本)9781628414776

This paper evaluates the performance of space shift keying (SSK) free-space optical communication (FSO) over moderate and strong turbulent channels. It has been shown previously that repetition codes (RCs) using intensity modulation with direct detection techniques are superior to SSK system for a spectral efficiency of 1 bit/s/Hz. It is shown in this study that SSK outperforms RCs using M-ary pulse amplitude modulation for spectral efficiencies of 3 bits/s/Hz or larger. Analytical expressions for the bit error rate for the SSK system under study are derived and extensive simulation results corroborate the correctness of the conducted analysis.

关键词： multiple-input multiple-output free-space optical communications space shift keying repetition codes pulse amplitude modulation negative-exponential channel log-normal channel

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Range Performance Evaluation of IEEE 802.11n Devices

Range Performance Evaluation of IEEE 802.11n Devices

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IEEE International Conference on Industrial Technology (ICIT)

作者： Gaonkar, Pradnya Tandur, Deepaknath Rafiq, Gulzaib ABB Corp Res Ctr Bangalore Karnataka India

ISBN: (纸本)9781479978007

The IEEE 802.11n standard utilizes multiple-input multiple-output (MIMO) technology in order to improve the throughput as well as the transmission range of the communication link. In this paper, the range performance evaluation of IEEE 802.11n standard compliant devices based on different configuration parameters, such as modulation and coding schemes, antenna numbers, and various available MIMO operational modes, is presented. The range improvement provided by IEEE 802.11n MIMO modes over the single-input single-output (SISO) system configuration is highlighted. The improved range reduces the number of required Wi-Fi devices in an area for a given reliability factor, such as the packet error rate (PER). Conversely, the reliability of a link can be improved for a given transmission range. Availability of such performance benchmark figures under different channel conditions allow the commissioning engineer to optimally design the network before the actual deployment. As a result, the overall installation/maintenance cost can be significantly reduced. The obtained results are applicable to both the traditional star as well as mesh topology networks.

关键词： IEEE 802.11n WLAN multiple-input multiple-output (MIMO) link budget over the air tests (OTA) space-time block coding (STBC) spatial division multiplexing (SDM) transmitter beamforming (TxBF) Maximal Ratio Combining (MRC) communication range packet error rate (PER) reliability performance evaluation

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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...

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IEEE/CIC International Conference on Communications in China (ICCC)

作者： Zheng, Guangtao Jiang, Ming Sun Yat Sen Univ Guangzhou Guangdong Peoples R China

ISBN: (纸本)9781509002436

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

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Terrestrial Broadcast Technologies for Next Generation Broadcast Wireless Systems

Terrestrial Broadcast Technologies for Next Generation Broad...

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IEEE International Conference on Communications (ICC)

作者： Kou, Yajun Wang, Fang Tian, Jinfeng Zhang, Wenjun Guan, Yunfeng He, Dazhi Shi, Yijun Chinese Acad Sci Shanghai Adv Res Inst Shanghai Peoples R China Shanghai Jiao Tong Univ Inst Image Commun & Network Engn Shanghai Peoples R China

ISBN: (纸本)9781467363051

The next generation broadcast wireless (NGB-W) system is aimed to provide high-speed, ubiquitous, and secure tri-play services to massive users. In this paper, a new terrestrial broadcast solution for the NGB-W system is proposed. The system and the key techniques of the proposed solution are introduced. The performance of the proposed solution is evaluated by simulations. It is shown that the performance of the proposed solution is better than that of the second generation terrestrial broadcast systems of Digital Video Broadcasting (DVB).

关键词： NGB-W terrestrial broadcast low-density parity check code bit-interleaved coded modulation multiple-input multiple-output carrier aggregation

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Single data set detection for multistatic Doppler radar

Single data set detection for multistatic Doppler radar

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作者： Shtarkalev, Bogomil Iliev University of Edinburgh

学位级别：doctor

The aim of this thesis is to develop and analyse single data set (SDS) detection algorithms that can utilise the advantages of widely-spaced (statistical) multiple-input multiple-output (MIMO) radar to increase their accuracy and performance. The algorithms make use of the observations obtained from multiple space-time adaptive processing (STAP) receivers and focus on covariance estimation and inversion to perform target detection. One of the main interferers for a Doppler radar has always been the radar’s own signal being reflected off the surroundings. The reflections of the transmitted waveforms from the ground and other stationary or slowly-moving objects in the background generate observations that can potentially raise false alarms. This creates the problem of searching for a target in both additive white Gaussian noise (AWGN) and highly-correlated (coloured) interference. Traditional STAP deals with the problem by using target-free training data to study this environment and build its characteristic covariance matrix. The data usually comes from range gates neighbouring the cell under test (CUT). In non-homogeneous or non-stationary environments, however, this training data may not reflect the statistics of the CUT accurately, which justifies the need to develop SDS methods for radar detection. The maximum likelihood estimation detector (MLED) and the generalised maximum likelihood estimation detector (GMLED) are two reduced-rank STAP algorithms that eliminate the need for training data when mapping the statistics of the background interference. The work in this thesis is largely based on these two algorithms. The first work derives the optimal maximum likelihood (ML) solution to the target detection problem when the MLED and GMLED are used in a multistatic radar scenario. This application assumes that the spatio-temporal Doppler frequencies produces in the individual bistatic STAP pairs of the MIMO system are ideally synchronised. Therefore the focus is on p

关键词： MIMO STAP doppler detection multiple-input multiple-output single data set detection

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On the energy efficiency of spatial modulation concepts

On the energy efficiency of spatial modulation concepts

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作者： Stavridis, Athanasios University of Edinburgh

学位级别：doctor

Spatial Modulation (SM) is a multiple-input multiple-output (MIMO) transmission technique which realizes low complexity implementations in wireless communication systems. Due the transmission principle of SM, only one Radio Frequency (RF) chain is required in the transmitter. Therefore, the complexity of the transmitter is lower compared to the complexity of traditional MIMO schemes, such as Spatial multipleXing (SMX). In addition, because of the single RF chain configuration of SM, only one Power Amplifier (PA) is required in the transmitter. Hence, SM has the potential to exhibit significant Energy Efficiency (EE) benefits. At the receiver side, due to the SM transmission mechanism, detection is conducted using a low complexity (single stream) Maximum Likelihood (ML) detector. However, despite the use of a single stream detector, SM achieves a multiplexing gain. A point-to-point closed-loop variant of SM is receive space modulation. In receive space modulation, the concept of SMis extended at the receiver side, using linear precoding with Channel State Information at the Transmitter (CSIT). Even though receive space modulation does not preserve the single RF chain configuration of SM, due to the deployed linear precoding, it can be efficiently incorporated in a Space Division multiple Access (SDMA) or in a Virtual multiple-input multiple-output (VMIMO) architecture. Inspired by the potentials of SM, the objectives of this thesis are the evaluation of the EE of SM and its extension in different forms of MIMO communication. In particular, a realistic power model for the power consumption of a Base Station (BS) is deployed in order to assess the EE of SM in terms of Mbps/J. By taking into account the whole power supply of a BS and considering a Time Division multiple Access (TDMA) multiple access scheme, it is shown that SM is significantly more energy efficient compared to the traditional MIMO techniques. In the considered system setup, it is shown that SM is up to

关键词： MIMO multiple-input multiple-output wireless communication relaying broadcast channel spatial modulation SM

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