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Journal articles on the topic 'Alamouti Code'

Author: Grafiati

Published: 4 June 2021

Last updated: 18 February 2022

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1

Kong, Bo, Wei Heng Dai, Xiao Jie, and Fei Hong Dong. "Research on Coded Cooperative Strategy in Satellite Communications." Applied Mechanics and Materials 198-199 (September 2012): 1684–89. http://dx.doi.org/10.4028/www.scientific.net/amm.198-199.1684.

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Aiming at the satellite mobile communication, the cooperative communication technology is applied to the forward downlink in this paper, and one scheme with two satellites based on the coded cooperative which used the Alamouti space time block code is presented. Simulation results show the coded cooperative strategy can obtain better performance than the traditional uncoded systems, which is lower than the MIMO system with two transmit antennas and one receive antenna based on the Alamouti code, but the power of the terminal was decreased. It has the advantage in communication range and low complex mobile terminal, which has a certain application prospects in satellite mobile communications in the future.

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2

Hu, Feng, Li Biao Jin, and Jian Zeng Li. "A Parallel Space-Time Block Code Based Transmission Scheme." Advanced Materials Research 605-607 (December 2012): 1959–64. http://dx.doi.org/10.4028/www.scientific.net/amr.605-607.1959.

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We present a new transmit strategy based on modified Alamouti codes for the simple two branch transmit diversity scheme. The OFDM payload cells from the output of the frequency interleaver is done on one transmit antenna, and the encoding is proceeded on another branch. The proposed encoding scheme can significantly simplify the processes of transforming SISO into MIMO in wireless communication systems. The scheme may easily be generalized to two transmit antennas and M receive antennas to provide a diversity order of 2M, its coding gain is similar to Alamouti code. Computer simulations are performed to investigate the performance of the proposed parallel STBC scheme in a multi-input (MI) system.

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3

Kyoung-Young Song, Jae-Dong Yang, Xianglan Jin, Jong-Seon No, and Habong Chung. "Alamouti code with quadrature partial response signaling." IEEE Transactions on Wireless Communications 8, no. 8 (2009): 3939–43. http://dx.doi.org/10.1109/twc.2009.081147.

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4

Hakimi, Walid, and Ammar Mahmoud. "Performance Evaluation of Space-Time and Harq Diversity in MIMO HSDPA." International Journal of Mobile Computing and Multimedia Communications 4, no. 3 (2012): 71–86. http://dx.doi.org/10.4018/jmcmc.2012070105.

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Multi-antenna techniques can be used to achieve improved system performance, including improved system capacity (more users per cell) and improved coverage (possibility for larger cells), as well as improved service provisioning, for example, higher per-user data rates. This study provides an overview of space-time diversity technique using Alamouti codes applied to the 3G evolution. The delays introduced by HARQ retransmission decrease the performance of the HSDPA system. Multi-antenna techniques are specifically applied to HSDPA to avoid HARQ retransmissions. The authors demonstrate that space-time Rake detector in MIMO 2x2 based on Alamouti code without HARQ process could give better performances than MIMO 2x1 taking into account the HARQ context. In the case of MIMO 2x2,they also observed that the limit of retransmissions affects the system performance and efficiency. Using the generalized Alamouti coding technique in MIMO 4x4 with Multipath Parallel Interference Canceller (MPIC) detector, we achieve notable improvement of performance under the same channel and signal to-Noise Ratio (SNR) conditions.

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5

Sindhu, P., D. B. Sasanka, and K. Hari Kishore. "Implementation of Alamouti 2X3 Code on FPGA Board." International Journal of Computer Applications 63, no. 8 (2013): 31–34. http://dx.doi.org/10.5120/10488-5241.

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6

Vishwanath, R., and Manav R. Bhatnagar. "High Data Rate Alamouti Code From Field Extension." Wireless Personal Communications 40, no. 4 (2006): 489–94. http://dx.doi.org/10.1007/s11277-006-9116-8.

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7

Ciflikli, Cebrail. "Combining Alamouti Scheme with Block Diagonalization Beamforming precoding for 5G Technology over Rician Channel." Infocommunications journal, no. 1 (2019): 22–28. http://dx.doi.org/10.36244/icj.2019.1.3.

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Wireless communication faces a number of adversities and obstacles as a result of fading and co-channel interference (CCI). Diversity with beamformer techniques may be used to mitigate degradation in the system performance. Alamouti space-time-block-code (STBC) is a strong scheme focused on accomplishing spatial diversity at the transmitter, which needs a straightforward linear processing in the receiver. Also, high bit-error-rate (BER) performance can be achieved by using the multiple-input multiple-output (MIMO) system with beamforming technology. This approach is particularly useful for CCI suppression. Exploiting the channel state information (CSI) at the transmitter can improve the STBC through the use of a beamforming precoding. In this paper, we propose the combination between Alamouti STBC and block diagonalization (BD) for downlink multi-user MIMO system. Also, this paper evaluates the system performance improvement of the extended Alamouti scheme, with the implementation of BD precoding over a Rayleigh and Rician channel. Simulation results show that the combined system has performance better than the performance of beamforming system. Also, it shows that the combined system performance of extended Alamouti outperforms the combined system performance without extended Alamouti. Furthermore, numerical results confirm that the Rician channel can significantly improve the combined system performance.

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8

Q. Taha, Zafar. "Efficient Decoding for Extended Alamouti Space-Time Block code." International Journal of Distributed and Parallel systems 2, no. 2 (2011): 96–103. http://dx.doi.org/10.5121/ijdps.2011.2209.

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9

Rahmati, Mojtaba, and Tolga M. Duman. "Spectrally Efficient Alamouti Code Structure in Asynchronous Cooperative Systems." IEEE Signal Processing Letters 21, no. 5 (2014): 545–49. http://dx.doi.org/10.1109/lsp.2014.2308296.

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10

Krikidis, Ioannis, and Himal A. Suraweera. "Full-Duplex Cooperative Diversity with Alamouti Space-Time Code." IEEE Wireless Communications Letters 2, no. 5 (2013): 519–22. http://dx.doi.org/10.1109/wcl.2013.070113.130400.

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11

Tsiligkaridis, Theodoros, and Douglas L. Jones. "PAPR Reduction Performance by Active Constellation Extension for Diversity MIMO-OFDM Systems." Journal of Electrical and Computer Engineering 2010 (2010): 1–5. http://dx.doi.org/10.1155/2010/930368.

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The V-BLAST wireless communication architecture, space-time block code (STBC), and space-frequency block code (SFBC) techniques are strong candidates for achieving very high data rates in 4G broadband wireless communications. This paper extends the efficient Active Constellation Extension Smart Gradient-Project (ACE-SGP) peak-to-average power (PAPR) reduction method to STBC, SFBC, and V-BLAST systems. Simulation results show 4.19 and 3.57 dB of PAPR reduction for the Alamouti STBC and SFBC, respectively.

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12

Badic, Biljana, Markus Rupp, and Hans Weinrichter. "Adaptive Channel-Matched Extended Alamouti Space-Time Code Exploiting Partial Feedback." ETRI Journal 26, no. 5 (2004): 443–51. http://dx.doi.org/10.4218/etrij.04.0703.0006.

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13

Guo, Li, Kunlun Liu, Dedan Meng, Xidong Mu, and Dahai Han. "Simulation and experimental research on the Alamouti code for ultraviolet communication." Optical Engineering 55, no. 1 (2016): 015101. http://dx.doi.org/10.1117/1.oe.55.1.015101.

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14

Bhatnagar, M. R., and Are Hjorungnes. "Improved Interference Cancellation Scheme for Two-User Detection of Alamouti Code." IEEE Transactions on Signal Processing 58, no. 8 (2010): 4459–65. http://dx.doi.org/10.1109/tsp.2010.2048211.

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15

Aydın, İbrahim, and Ümit Aygölü. "Performance analysis of a multihop relay network using distributed Alamouti code." Wireless Networks 21, no. 1 (2014): 217–26. http://dx.doi.org/10.1007/s11276-014-0781-3.

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16

Ramzy, Safwat M. "Performance enhancement of cooperative networks utilizing MAP decoder and Alamouti code." Menoufia Journal of Electronic Engineering Research 30, no. 1 (2021): 35–40. http://dx.doi.org/10.21608/mjeer.2021.146087.

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17

Abdulameer, Lwaa Faisal, and Hala Fadhil. "Performance Analysis of FSO under Turbulent Channel Using OSTBC." Al-Nahrain Journal for Engineering Sciences 21, no. 3 (2018): 344–49. http://dx.doi.org/10.29194/njes.21030344.

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Free Space Optics (FSO) plays a vital role in modern wireless communications due to its advantages over fiber optics and RF techniques where a transmission of huge bandwidth and access to remote places become possible. The specific aim of this research is to analyze the Bit-Error Rate (BER) for FSO communication system when the signal is sent the over medium of turbulence channel, where the fading channel is described by the Gamma-Gamma model. The signal quality is improved by using Optical Space-Time Block- Code (OSTBC) and then the BER will be reduced. Optical 2×2 Alamouti scheme required 14 dB bit energy to noise ratio (Eb/N0) at 10-5 bit error rate (BER) which gives 3.5 dB gain as compared to no diversity scheme. The results show that using Multiple-Input-Multiple-Output (MIMO) technique represented by Alamouti scheme gives the improved BER performance as compared with no diversity (Single-Input-Single-Output (SISO)) technique.

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18

Arar, Maher, and Abbas Yongacoglu. "Efficient detection algorithm for 2Nx2N MIMO systems using alamouti code and QR decomposition." IEEE Communications Letters 10, no. 12 (2006): 819–21. http://dx.doi.org/10.1109/lcomm.2006.060953.

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19

Li, Guoquan, Xiang-Gen Xia, and Yucheng Wu. "An Optimal Zero-Forcing PIC Group Decoding for Two-User Layered Alamouti Code." IEEE Transactions on Communications 59, no. 12 (2011): 3290–93. http://dx.doi.org/10.1109/tcomm.2011.091911.100256a.

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20

Huo, Peng, and Lei Cao. "BER analysis and power allocation for cooperative diversity networks with distributed Alamouti code." Wireless Communications and Mobile Computing 15, no. 7 (2013): 1155–70. http://dx.doi.org/10.1002/wcm.2400.

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21

Kong, Hyung Yun, Ho Van Khuong, and Doo Hee Nam. "Exact error and outage probability formulas for Alamouti space time code 2 × J." Journal of Communications and Networks 9, no. 2 (2007): 177–84. http://dx.doi.org/10.1109/jcn.2007.6182837.

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22

Pham, Van-Bien, and Wei-Xing Sheng. "Performance Analysis of Alamouti Space-Time Block Code Over Time-Selective Fading Channels." Wireless Personal Communications 73, no. 3 (2013): 401–13. http://dx.doi.org/10.1007/s11277-013-1194-9.

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23

Zhang, You Yan, and Shu Yue Hong. "A Novel Transmit Diversity Technique for MIMO System." Advanced Materials Research 468-471 (February 2012): 355–59. http://dx.doi.org/10.4028/www.scientific.net/amr.468-471.355.

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The antenna diversity based on log-likelihood ratio (LLR) is better than that based on signal-to-noise ratio (SNR) in bit error rate performance for MIMO systems. Thus in this paper, we present a novel transmit antenna selection scheme based on bit log-likelihood ratio when the Alamouti code is employed .Then the BER expressions of application based on Bit-LLR (BLLR) for MPSK and MQAM modulation with Gray code are derived. The simulation results show that the new scheme based on BLLR is superior to SNR. With the increase of the transmit antennas, the performance of system is improved significantly. Furthermore, the diversity order is the same as that of the full complexity systems.

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24

Bhadada, Rajesh, and Ritika Taparia. "Performance Analysis of Alamouti Code MIMO-OFDM Systems for Error Control and IQ Impairments." Communications on Applied Electronics 1, no. 2 (2015): 14–17. http://dx.doi.org/10.5120/cae-1506.

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25

Singh, Surinder, Mark Crispo, Jean-François Bousquet, and Shadi Aljendi. "A Janus compatible software-defined underwater acoustic multiple-input multiple-output modem." International Journal of Distributed Sensor Networks 17, no. 4 (2021): 155014772110106. http://dx.doi.org/10.1177/15501477211010663.

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This article describes the implementation of a multiple-input multiple-output acoustic communication link in shallow water conditions to enable a software-defined acoustic modem with a maximum transmission rate of 20 kbps in a 5-kHz bandwidth. The reliability improvement of a low-complexity Alamouti space–time block code is evaluated to improve the diversity in a high-rate transmission mode using single carrier modulation, as well as in a low-rate transmission mode relying on continuous-phase frequency-shift keying. Using measurements in realistic subsea conditions, the effect of the spatial channel correlation is demonstrated. It is found that for the space–time block code/continuous-phase frequency-shift keying, the spatial diversity is significantly degraded due to the high spatial correlation. In contrast, for the high-mode transmission rate, space–time block code with single carrier modulation offers a bit error rate improvement by a factor over hundred, in comparison to a single transmit element, demonstrating that the multiple-input multiple-output optimal code depends on the software-defined acoustic modem transmission mode.

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26

Jootar, J., J. R. Zeidler, and J. G. Proakis. "On the performance of concatenated convolutional code and Alamouti space-time code with noisy channel estimates and finite-depth interleaving." IEEE Transactions on Communications 56, no. 3 (2008): 412–23. http://dx.doi.org/10.1109/tcomm.2008.060175.

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27

Harlen, Sekar, Eva Yovita Dwi Utami, and Andreas Ardian Febrianto. "Bit Error Rate pada Sistem MIMO MC-CDMA dengan Teknik Alamouti-STBC." Techné : Jurnal Ilmiah Elektroteknika 16, no. 02 (2017): 99–109. http://dx.doi.org/10.31358/techne.v16i02.163.

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Pada makalah ini dilaporkan hasil penelitian sistem MIMO MC-CDMA dengan teknik Alamouti Space Time Block Code (STBC) menggunakan dua antena pengirim dan dua antena penerima. Kinerja sistem diukur dengan nilai Bit Error Rate (BER). Sistem yang diteliti disimulasikan dengan Matlab, dengan variasi jumlah pengguna, jumlah subpembawa, kecepatan pergerakan pengguna dan frekuensi Doppler. Hasil simulasi menunjukkan BER sistem MIMO MC-CDMA tidak mengalami penurunan yang tajam ketika jumlah pengguna dan frekuensi Doppler meningkat. Sedangkan simulasi dengan peningkatan jumlah subpembawa mampu menurunkan nilai BER sistem. Simulasi juga menunjukkan sistem MIMO-MC-CDMA memiliki kinerja sistem yang lebih baik dibandingkan sistem MC-CDMA yang ditunjukkan dengan nilai BER sistem MIMO MC-CDMA berada pada orde 10-4 dan sistem MC-CDMA pada orde 10-1.

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28

Wang, Haiquan, Yabo Li, Xiang-Gen Xia, and Shunlan Liu. "Unitary and Non-Unitary Precoders for a Limited Feedback Precoded OSTBC System." Vehicular Technology, IEEE Transactions on 62, no. 4 (2013): 1646–54. http://dx.doi.org/10.1109/tvt.2012.2233508.

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In this paper, a multiple-input-multiple-output (MIMO) system with finite-bit feedback first proposed by Love-Heath is considered, where a transmitted signal consists of a precode followed by an orthogonal space-time block code (OSTBC), such as Alamouti code. A new design criterion and a corresponding design method of precoders are proposed. Simulations show that the precoders obtained by our proposed criterion and method perform better than the existing ones. Furthermore, since our proposed precoders have a layered structure, their designs can be implemented in the simplest Grassmannian manifold. Moreover, a fast encoding algorithm can be applied, which can greatly reduce the complexity of codeword selection. In this paper, we also propose non-unitary precoders and their design criterion and method based on the performance analysis and the special property of an OSTBC. Interestingly, non-unitary precoders can significantly improve performance over unitary precoders.

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29

Bakir, H. A., F. Debbat, and F. T. Bendimerad. "Performance Comparison of STBC-OFDM with Maximum Likelihood Detection for Rayleigh Fading Channel." International Journal of Engineering Research in Africa 26 (October 2016): 111–21. http://dx.doi.org/10.4028/www.scientific.net/jera.26.111.

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The combined system STBC-OFDM has considered an important association to integrate into actual and next wireless system. Such as the Wifi standard, WiMAX standard, the LTE fourth generation of mobile. Which combat the effect of multipath fading channel that limited the performance in wireless communications. In recent years, this association has been a large study to achieve a better performance of BER and designed for the different situation of the wireless channel from slow to fast fading channel, with various parameters of OFDM modulation and under different condition of STBC code. To contribute in this axis of research, we present a comparative study of the simulation result for STBC-OFDM. The first results are the comparison between three schemes of STBC (Alamouti code, Orthogonal STBC, Non-Orthogonal STBC) associated with OFDM. The second results are the comparison between three schemes when applied OFDM in different parameters and also when these codes used without OFDM modulation. The channel considered across simulation is Rayleigh fading channel that presented a real situation of the wireless environment, the Maximum Likelihood (ML) is used for detection the data that encoded in the first. The performance of three schemes is evaluated by BER (Bit Error Rate) versus the different values of SNR (Signal Noise Ratio).

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30

Eldemerdash, Y. A., M. Marey, O. A. Dobre, G. K. Karagiannidis, and R. Inkol. "Fourth-Order Statistics for Blind Classification of Spatial Multiplexing and Alamouti Space-Time Block Code Signals." IEEE Transactions on Communications 61, no. 6 (2013): 2420–31. http://dx.doi.org/10.1109/tcomm.2013.042313.120629.

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31

Baghersalimi, Gholamreza, Mohammad Rahimi, and Mahdi Nassiri. "Performance evaluation of a downlink MIMO wideband code-division multiple access-based radio-over-fibre system using Alamouti space-time block code." IET Communications 13, no. 8 (2019): 955–62. http://dx.doi.org/10.1049/iet-com.2018.5390.

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32

Sterian, Corneliu Eugen D. "A Survey of Coding and Modulation Techniques for Inter-Vehicular Communications." International Journal of Vehicular Telematics and Infotainment Systems 1, no. 2 (2017): 46–70. http://dx.doi.org/10.4018/ijvtis.2017070104.

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Direct inter-vehicular communication means that there is no infrastructure. This is in sharp contrast to mobile communication within a cellular network or between a moving vehicle and the roadside. It is assumed in this article that the mobile channel between the two vehicles is too rapidly time variable to be possible to measure it in real-time. The natural choice is then to select those coding and modulation techniques for which the knowledge of the channel state is not necessary at both the transmitter and the receiver, that is, to consider only differential and noncoherent communications technologies. As interesting options, the celebrated Golden code and the recently developed Golden-Alamouti space-time trellis coding are also proposed for inter-vehicular communications.

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33

She, Feng, Hsiao Hwa Chen, and Hongyang Li. "Joint Angular and Time Diversity of Multi-Antenna CDMA Systems in Wireless Fading Channels." International Journal of Wireless Networks and Broadband Technologies 1, no. 1 (2011): 1–14. http://dx.doi.org/10.4018/ijwnbt.2011010101.

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In this paper, a multi-antenna based receiver structure for direct sequence code division multiple access (DS/CDMA) system is proposed. The proposed scheme exploits the excellent time resolution of a CDMA RAKE receiver and uses an antenna array beamforming structure to resolve multipath returns in both angular and time domains. A much higher diversity gain than that based only on the time domain diversity can be achieved. This work suggests a new space-time diversity paradigm, namely angular-time diversity, which differs from traditional Alamouti-type space-time coded schemes. The impairments caused by multipath and multiuser interference are analyzed. The performance of the proposed receiver in multipath fading channel is explicitly evaluated. An expression for uncoded system bit error probability is derived. Simulation results show the performance improvement in terms of BER due to the use of multi-antenna in the receiver, and the results illustrate that the multi-antenna based receiver works effectively in resolving multipaths in both angular and time domains to achieve performance improvement due to angular and time diversity gain provided by the multi-antenna system.

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34

Mohammadkarimi, Mostafa, and Octavia A. Dobre. "Blind Identification of Spatial Multiplexing and Alamouti Space-Time Block Code via Kolmogorov-Smirnov (K-S) Test." IEEE Communications Letters 18, no. 10 (2014): 1711–14. http://dx.doi.org/10.1109/lcomm.2014.2352305.

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35

Islam, MS, M. Morshed, RC Roy, and MHA Begum. "Analytical approach of an FSO Link with alamouti- type STBC considering weak atmospheric turbulence." Bangladesh Journal of Scientific and Industrial Research 53, no. 3 (2018): 205–10. http://dx.doi.org/10.3329/bjsir.v53i3.38267.

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An analytical approach is proposed to evaluate the bit error rate (BER) performance of a direct detection on-off keying (OOK) free space optical link over log-normal atmospheric turbulence-induced fading channels based on modified Alamouti code presented by Simon and Vilnrotter and maximal ratio combining (MRC) at the receiver. Simulations show that due to coding and diversity at the receiver, a significant improvement in the BER performance is obtained at a given BER. For diversity order of 2 in both transmitter and in receiver, the amount of BER improvement is 6.6dB at BER 10-5. Further increment of the receiver diversity from 2 to 4 gives additional 3dB improvement at the same BER. A drastic improvement of the BER performance is also possible for increasing number of receiver diversity which may increase hardware complexity. Simulation results are demonstrated to confirm the analytical results.Bangladesh J. Sci. Ind. Res.53(3), 205-210, 2018

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36

Ahmed, Arshee, Haroon Rasheed, and Madhusanka Liyanage. "Millimeter-Wave Channel Modeling in a Vehicular Ad-Hoc Network Using Bose–Chaudhuri–Hocquenghem (BCH) Code." Electronics 10, no. 9 (2021): 992. http://dx.doi.org/10.3390/electronics10090992.

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The increase in capacity demand for vehicular communication is generating interest among researchers. The standard spectra allocated to VANET tend to be saturated and are no longer enough for real-time applications. Millimeter-wave is a potential candidate for VANET applications. However, millimeter-wave is susceptible to pathloss and fading, which degrade system performance. Beamforming, multi-input multi-output (MIMO) and diversity techniques are being employed to minimize throughput, reliability and data rate issues. This paper presents a tractable channel model for VANET in which system performance degradation due to error is addressed by concatenated Alamouti space-time block coding (ASTBC) and Bose–Chaudhuri–Hocquenghem (BCH) coding. Two closed-form approximations of bit error rate (BER), one for BCH in Rayleigh fading and the second for BCH with ASTBC, are derived. These expressions comprise SNR and code rate and can be utilized in designing VANET architectures. The results show that the BER using concatenated ASTBC and BCH outmatches the conventional BER ASTBC expression. The analytical results are compared with numerical results, thereby showing the accuracy of our closed-form expressions. The performance of the proposed expressions is evaluated using different code rates.

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37

Shams, Rifat Ara. "Effect of Interleaved FEC Code on Wavelet Based MC-CDMA System with Alamouti STBC in Different Modulation Schemes." International Journal of Computer Science, Engineering and Information Technology 2, no. 1 (2012): 235–33. http://dx.doi.org/10.5121/ijcseit.2012.2103.

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38

Solodovnyk, V. I., and M. I. Naumenko. "SYNTHESIS OF SPECTRALLY AND ENERGY-EFFICIENT SIGNAL-CODE CONSTRUCTIONS FOR MIMO SYSTEMS WITH SIGNALS SPATIAL CODING." Proceedings of the O.S. Popov ОNAT 1, no. 1 (2020): 68–81. http://dx.doi.org/10.33243/2518-7139-2020-1-1-68-81.

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Wireless communication systems are considered, the main task of which is to increase their spectral (SE) and energy efficiency (EE) in conditions of limited frequency and energy resources. Additional use of the spatial resource based on flexible and universal methods of signals Space-Time Coding (STC) in MIMO-systems (Multiple Input - Multiple Output) can significantly increase the SE and EE values, as well as significantly improve the capabilities and conditions for EE exchange on SE. The advantages and disadvantages of Orthogonal Space-Time Block Coding (OSTBC) and Non-Orthogonal STBC (NOSTBC) are shown. Two main methods of synthesis of spectrally and energy-efficient information transmission methods are demonstrated. The first method is implemented by creating Perfect-codes that simultaneously achieve maximum diversity and multiplexing gains. The exponential computational decoding complexity of such codes makes it impossible for their practical implementation in mobile terminals at the present stage of development of circuitry. The second method of synthesis is based on improving the simple basic STC methods in terms of increasing the SE and EE by creating Signal-Code Constructions (SCC), which have the advantages of the basic STC methods and are devoid of the disadvantages inherent in Perfect-codes. A technique for the synthesis of SCC is proposed, the essence of which is to determine the priority areas (by the value of the Signal-to-Noise Ratio (SNR)) of using the STC and corresponding signal constellations, which provide the maximum SE for a guaranteed Bit Error Rate (BER). It was found that MIMO 2x2 with Alamouti OSTBC has an advantage in terms of EE over NOSTBC type VBLAST for SE not more than 8 b/s/Hz and SNR under 35 dB, BER not exceeding 10-5. In MIMO 4x4, OSTBC codes are inferior to NOSTBC in terms of EE. VBLAST code allows to provide SE 4 - 8 b/s/Hz at SNR 10 - 20 dB, BER not exceeding 10-5. Based on the results obtained, propositions for further improvement of OSTBC and NOSTBC are formulated.

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39

Kim, Jaehong, Dong-Joon Shin, Jong-Seon No, Xianglan Jin, and Dong-Sup Jin. "Interference alignment-and-cancellation scheme based on Alamouti code for the three-user multi-input–multi-output interference channel." IET Communications 9, no. 10 (2015): 1278–88. http://dx.doi.org/10.1049/iet-com.2014.1084.

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40

Romanuke, Vadim. "Pilot Symbol Error Re - Orthogonalization in 2 × 2 MIMO Systems of Wireless Communication." Scientific Journal of Polish Naval Academy 222, no. 3 (2020): 42–66. http://dx.doi.org/10.2478/sjpna-2020-0010.

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AbstractA 2×2 MIMO wireless communication system with channel estimation is simulated, in which two transmit, and two receive antennas are employed. The orthogonal pilot signal approach is used for the channel estimation, where the Hadamard sequences are used for piloting. Data are modulated by coherent binary phase-shift keying, whereupon an orthogonal space-time block coding subsystem encodes information symbols by using the Alamouti code. Based on the simulation, it is ascertained a possibility to decrease the bit-error rate by substituting the Hadamard sequences for the sequences having irregular structures, and constituting the eight known orthogonal bases. Considering a de-orthogonalization caused by two any pilot sequence symbol errors, the bit-error rate is decreased by almost 2.9 %. If de-orthogonalizations are caused by two repeated indefinite, and definite pilot sequence symbol errors, the decrements are almost 16 % and 10 %, respectively. Whichever sequences are used for piloting, the 2×2 MIMO system is ascertained to be resistant to the de-orthogonalization if the frame is of 128 to 256 symbols piloted with 32 to 64 symbols, respectively.

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41

Gong, Feng-Kui, Jian-Kang Zhang, Yi-Jun Zhu, and Jian-Hua Ge. "Energy-Efficient Collaborative Alamouti Codes." IEEE Wireless Communications Letters 1, no. 5 (2012): 512–15. http://dx.doi.org/10.1109/wcl.2012.072012.120275.

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42

Na, Dongjun, and Kwonhue Choi. "Intrinsic ICI-Free Alamouti Coded FBMC." IEEE Communications Letters 20, no. 10 (2016): 1971–74. http://dx.doi.org/10.1109/lcomm.2016.2593922.

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43

Kaur, Satwinder, Lavish Kansal, Gurjot Singh Gaba, and Mohannad A. M. Al-Ja'afari. "BER Assessment of FBMC Systems Augmented with Different Space-Time Coding Schemes Over Diverse Channels." International Journal of Engineering & Technology 7, no. 3.8 (2018): 111. http://dx.doi.org/10.14419/ijet.v7i3.8.16844.

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Diverse methodologies of encoding schemes like space-time block codes (STBC), orthogonal space-time block codes (OSTBC) &quasi-orthogonal space-time block codes (QOSTBC) are being proposed as alternatives of basic Alamouti space-time encoding scheme for multiple input multiple output (MIMO) scheme for existing wireless communication systems. Since filter bank multi-carrier (FBMC) scheme is an integral part of the 5th generation (5G) cellular systems, the performance of these schemes needs to be investigated for FBMC methodology also. Alamouti and Space-time block codes are widely used in MIMO system because of their ability to achieve full diversity and the different channels are used at the receiver. In this work, we proposed different approaches for the bit error rate (BER) of Alamouti, STBC3, and STBC4 in FBMC. These approaches are based on the type of space-time encoding and number of receiving antennas being used for each space time encoding scheme for analyzing the MIMO-FBMC. Moreover, we also investigation the performance of these proposed MIMO schemes over Rayleigh and additive white Gaussian noise (AWGN) channel and compared it with the performance of BER or signal to noise ratio (SNR) of different channels.

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44

Khodor, Naim, Jean-Pierre Cances, Vahid Meghdadi, and Raymond Quere. "Performances of chaos-coded modulation concatenated with Alamouti’s space–time block code." annals of telecommunications - annales des télécommunications 67, no. 1-2 (2011): 27–55. http://dx.doi.org/10.1007/s12243-011-0242-2.

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45

Jang, Sangmin, Dongjun Na, and Kwonhue Choi. "SDR Implementation of Alamouti-coded FBMC and Performance analysis of Indoor Application." Journal of the Institute of Electronics and Information Engineers 57, no. 4 (2020): 13–22. http://dx.doi.org/10.5573/ieie.2020.57.4.13.

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YAMAOKA, Tomoya, Yoshitaka HARA, Noriyuki FUKUI, Hiroshi KUBO, and Takaya YAMAZATO. "A Simple Cooperative Relaying with Alamouti Coded Transmission." IEICE Transactions on Communications E95-B, no. 2 (2012): 643–46. http://dx.doi.org/10.1587/transcom.e95.b.643.

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Kim, Bong-seok, and Kwonhue Choi. "FADAC-OFDM: Frequency-Asynchronous Distributed Alamouti-Coded OFDM." IEEE Transactions on Vehicular Technology 64, no. 2 (2015): 466–80. http://dx.doi.org/10.1109/tvt.2014.2325606.

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Ali, S., B. Adebisi, G. Markarian, and E. Arikan. "Signal combining in LINC amplifier using Alamouti codes." Electronics Letters 46, no. 18 (2010): 1301. http://dx.doi.org/10.1049/el.2010.1015.

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Gong, Feng-Kui, Jian-Kang Zhang, and Jian-Hua Ge. "Distributed Concatenated Alamouti Codes for Two-Way Relaying Networks." IEEE Wireless Communications Letters 1, no. 3 (2012): 197–200. http://dx.doi.org/10.1109/wcl.2012.031512.120068.

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Liu, Jin, and E. Gunawan. "Combining ideal beamforming and Alamouti space-time block codes." Electronics Letters 39, no. 17 (2003): 1258. http://dx.doi.org/10.1049/el:20030824.

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