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International Conference on Wireless Communications, Networking and Mobile Computing

作者： Gao, JB Zhou, ML Zhang, BJ Huazhong Univ Sci & Technol Dept Elect & Informat Engn Wuhan 430074 Peoples R China

ISBN: (纸本)078039335X

Most existing space-time block code (STBC) schemes have been developed for flat and quasi-static fading channels. Recently, Geoffrey et al. propose a general geometric spatially and temporally correlated multiple-input multiple-output (MIMO) channel model, which considers motion of the receiver and nonisotropic scattering at both ends of the radio link and give the compact closed-form space-time cross-correlation function. Simultaneously, the outage and ergodic capacity of this channel is investigated based on this model. In this paper, we investigate the STBC performance based on the above channel model. On the one hand, we further testify the validity of this general model, on the other hand, we evaluate the influence of the channel time variation on the STBC performance.

关键词： space-time block code MIMO correlated channel time variation

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Performance of adaptive coding by selection of space-time block code matrix

Performance of adaptive coding by selection of space-time bl...

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60th IEEE Vehicular Technology Conference

作者： Niida, SL Inoue, T Takeuchi, Y KDDI Corp Mobile Commun Lab Chiyoda Ku Tokyo 1028460 Japan

ISBN: (纸本)0780385217

The 3rd generation mobile communication systems are currently spreading throughout the world and high speed data services on mobile systems such as streaming video, streaming audio and video phone are being widely utilized by the public at large. As higher speed rate services are infiltrated, the provision of wider band wireless systems is expected. MIMO (Multiple Input, Multiple Output) systems, which equip several antennas with both a transmitter and receiver, have recently been attracting much attention. space-time coding is a technique that exploits transmission diversity and achieves high performance under a fading environment. The space-time block code is attracting particular attention for its high performance and decoding simplicity. We propose an adaptive coding scheme method using the space-time block code. It changes the space-time block coding pattern and the modulation symbol according to the receiving condition. In this paper, we discuss this scheme and evaluate its throughput and transmission power performances based on simulation results using on ideal propagation environments and measured data in the experiment.

关键词： space-time block code adaptive coding adaptive modulation real tranmission environment

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An Improved space-time block code for Two Transmit Antennas and Three time Slots 1

An Improved Space-Time Block Code for Two Transmit Antennas ...

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International Conference on Information and Communication Technology Research (ICTRC 2015)

作者： Sindhu, P. Hameed, Abdul Govt Engn Coll Dept Elect Kozhikode India

ISBN: (纸本)9781479989669

space-time block codes offer transmit diversity in Multiple Input Multiple Output wireless systems. Orthogonal and quasi-orthogonal space-time block codes have been developed for improving the performance of wireless communication systems. Three time slot-two transmit antenna systems are of interest in many practical situations in Long Term Evolution-Advanced 4G standard. Quasi-orthogonal and hybrid designs are available in literature. This paper proposes a new space-time block code for three time slot-two transmit antenna design problem for implementation in Single Carrier FDE which is the uplink mode in 4G LTE-Advanced. The encoding along with the frequency domain decoding is presented with extensive simulation results to back the superiority of the new space-time block code developed. Our improved code offers lower bit error rate at a code rate of one. The zero-forcing equalization in frequency domain makes this new code suitable for SC-FDE systems.

关键词： Single Carrier Frequency Domain Equalization Long Term Evolution Diversity space-time block code Orthogonal STBC Quasi-orthogonal STBC

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Fast Sub-Optimal Detection of Quasi-Orthogonal space-time block code 7

Fast Sub-Optimal Detection of Quasi-Orthogonal Space-Time Bl...

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7th International Symposium on Telecommunications (IST)

作者： Ahmadi, Adel Talebi, Siamak Shahid Bahonar Univ Kerman Dept Elect Engn Kerman Iran

ISBN: (纸本)9781479953592

In this paper, a fast sub-optimal decoding method is proposed for quasi-orthogonal space-time block codes (QOSTBCs) with four transmit antennas. The proposed method focuses on the phases of received vector to select an origin and create a limited region among proper candidates. The limited region and proper candidates are selected from some sorted look-up tables by utilizing the phases of received vector. Euclidean distance of the most probable candidate is firstly computed and then the distances of other candidates are successively assessed to attain minimum distance. Simulation results confirm that proposed method has adequate performance, while it significantly requires fewer floating point operations compared to the other methods.

关键词： fast sub-optimal decoding low complexity detection quasi-orthogonal space-time block code

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Efficient Trellis-coded Modulation Using Ungerboeck-Gray Mapping Associated with space-time block code

Efficient Trellis-Coded Modulation Using Ungerboeck-Gray Map...

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6th International Conference on Sciences of Electronics, Technologies of Information and Telecommunications (SETIT)

作者： Benaissa, Mohamed Bassou, Abdesselam Univ Bechar Dept Elect Engn Bechar Algeria

ISBN: (纸本)9781467316583

In this paper, the comparison of the concatenation of the space-time block codes (STBCs) to the Trellis-coded Modulation with Ungerboeck-Gray mapping (TCM-UGM) and Trellis-coded Modulation (TCM) is considered. The performance of the proposed scheme is evaluated by simulation over Memoryless Rayleigh Fading (MRF) channel. A simple two-antenna STBC is combined to TCM and TCM-UGM as inner code for transmitting diversity and one or two receive antennas. The decoding scheme is based on Logarithm of Maximum a Posteriori (Log-MAP) algorithm. Simulation results for a several memory order show that exploiting transmit-diversity using STBCs provides best performance for the TCM-UGM.

关键词： component Logarithm of maximum a posteriori space-time block code trellis-coded modulation trellis-coded modulation with Ungerboeck-Gary mapping

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Improved algorithm of space-time block code for DSP implementation 6

Improved algorithm of Space-Time Block Code for DSP implemen...

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6th International Conference on Signal Processing

作者： Ge, YS Zhao, YX Tianjin Univ Sch Elect Informat Engn Tianjin 300072 Peoples R China

ISBN: (纸本)0780374886

This paper Presents an improved, low power algorithm for the DSP implementation of space-time block codes(STBC) using the previous reported maximum likelihood algorithm [3]. The new algorithm arrives at the same. decision with less computation and reduces power dissipation It is easily to using this algorithm in low-rank STBC and hopeful in high-rank STBC for an actual DSP. Based on the Tarokh's algorithm, a more efficient algorithm is developed by utilizing the properties of the constellation signals and decision matrices. In most cases, the new algorithm results in more than 30% reduction in the computation complexity.

关键词： space-time block code DSP wireless communication

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New Minimum Decoding Complexity Quasi-Orthogonal space-time block code for 8 Transmit Antennas

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IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES 2008年第10期E91A卷 2990-2994页

作者： Chae, Changhyeon Choi, Daewon Jung, Taejin Chonnam Natl Univ Sch Elect & Comp Engn Kwangju South Korea

In this paper, a new full-rate space-time block code (STBC) possessing a quasi-orthogonal (QO) property is proposed for QAM and 8 transmit antennas. This code is designed by serially concatenating a real constellation-rotating precoder with the Alamouti scheme. The QO property enables ML decoding to be done with joint detection of only four real symbols like the conventional minimum decoding complexity QO-STBC (MDC-QO-STBC). However. the proposed code is guaranteed to achieve full spatial diversity for general QAM unlike the MDC-QO-STBC which is specifically presented for only 4-QAM. By computer simulation results, we show that the proposed code exhibits the identical and slightly degraded error performance with the MDC-QO-STBC for 4-QAM and the Sharma's QO-STBC for 4 and 16-QAM, respectively. Finally, we present a new modified scheme of the original code so that there is no any discontinuity of transmission at each transmit antenna, without any loss oferror performance.

关键词： multiple antennas space-time block code

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Achievable rate optimization for space-time block code-aided cooperative NOMA with energy harvesting

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ENGINEERING SCIENCE AND TECHNOLOGY-AN INTERNATIONAL JOURNAL-JESTECH 2023年 40卷

作者： Alamu, Olumide Olwal, Thomas O. Djouani, Karim Tshwane Univ Technol Dept Elect Engn FSATI Pretoria South Africa

Cooperative non-orthogonal multiple access (C-NOMA) is one of the promising techniques that support the massive connectivity of users and improve the fair allocation of network resources. However, the performance of C-NOMA networks is restricted due to the complexity introduced by multiple user-assisted relays coupled with their energy consumption bottleneck. In this paper, we develop a low-complexity network framework with the main goal of achieving a fair and optimal achievable rate. For the network model, we adopt a space-time block code transmission scheme to increase the spatial diversity of the network with a minimum number of relays. Further to this, we consider a radio frequency-based energy harvesting technique known as simultaneous wireless information and power transfer in order to compensate for energy expended by the relays over the cooperating transmission links. Based on the proposed network model, we solve the achievable rate maximization problem from the perspective of joint optimal power allocation factor and power splitting ratio. Due to the non-convex nature of the problem and to also ensure fair resource allocation, we propose a low-complexity solution based on the concept of Nash bargaining solution. Further to this, we evaluate the achievable rate and energy efficiency of the system. Simulation results show that our proposed solution outperforms the baseline approaches. (C) 2023 Karabuk University. Publishing services by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://***/licenses/by-nc-nd/4.0/).

关键词： Achievable rate space-time block code Cooperative NOMA Energy harvesting Nash bargaining solution

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Spatially and Temporally Correlated MIMO Channels: Performance Evaluating of space-time block code

Spatially and Temporally Correlated MIMO Channels: Performan...

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2005年无线通信、网络和移动计算国际会议

作者： Jingbo Gao Manli Zhou Bijun Zhang Department of Electronics & Information Engineering Huazhong University of Science & Technology Wuhan 430074 P.R.China

ISBN: (纸本)078039335X

Most existing space-time block code (STBC) schemes have been developed for flat and quasi-static fading channels. Recently, Geoffrey et al. propose a general geometric spatially and temporally correlated multiple-input multiple-output (MIMO) channel model, which considers motion of the receiver and nonisotropic scattering at both ends of the radio link and give the compact closed-form space-time cross-correlation function. Simultaneously, the outage and ergodic capacity of this channel is investigated based on this model. In this paper,we investigate the STBC performance based on the above channel *** the one hand, we further testify the validity of this general model, on the other hand, we evaluate the influence of the channel time variation on the STBC performance.

关键词： space-time block code MIMO correlated channel time variation

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Performance Analysis of a Free space Optical Link using Alamouti Type space time block code with Weak Turbulent Condition

Performance Analysis of a Free Space Optical Link using Alam...

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7th International Conference on Electrical and Computer Engineering

作者： Islam, M. Shariful Majumder, S. P. Ahsanullah Univ Sci & Technol Dept Elect & Elect Engn Dhaka Bangladesh

ISBN: (纸本)9781467314343;9781467314350

In this paper, we investigate the performance of a free space optical link using Alamouti type space time block code (STBC) over weak atmospheric turbulence-induced fading channels. An analytical approach is presented to evaluate the bit error rate (BER) performance of a direct detection on-off keying (OOK) free space optical link over a weak atmospheric turbulent condition considering Alamouti type space time block code (STBC) and maximal ratio combining (MRC) at the receiver. The results are evaluated numerically and also by simulation. Results show that there is significant improvement in BER performance at a given BER due to coding and diversity combining at the receiver. The amount of improvement for (M X L) STBC is of the order of 18 dB, 10 dB and 5 dB for laser source, M=2 and number of photodetector, L = 1, 2 and 4 respectively.

关键词： Multiple Input Multiple Output Bit Error Rate space-time block code Transmit Diversity Free space Optic Maximal Ratio Combining

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