scholarly journals Space-Time Block Coded Cooperative MIMO Systems

Sensors ◽  
2020 ◽  
Vol 21 (1) ◽  
pp. 109
Author(s):  
Han Hai ◽  
Caiyan Li ◽  
Jun Li ◽  
Yuyang Peng ◽  
Jia Hou ◽  
...  
Keyword(s):  
Mimo Systems ◽  
Multiple Input Multiple Output ◽  
Block Code ◽  
Spatial Diversity ◽  
Space Time ◽  
Time Block ◽  
Multiple Input ◽  
Input Multiple Output ◽  
Significant Performance ◽  
Save Energy

The main objective of a Cooperative Multiple-Input Multiple-Output (CMIMO) system is to improve network throughput and network coverage and save energy. By grouping wireless devices as virtual multi-antenna nodes, it can thus simulate the functions of multi-antenna systems. A Space-Time Block Code (STBC) was proposed to utilize the spatial diversity of MIMO systems to improve the diversity gain and coding gain. In this paper, we proposed a cooperative strategy based on STBC and CMIMO, which is referred to as Space-Time Block Coded Cooperative Multiple-Input Multiple-Output (STBC-CMIMO) to inherit the advantages from both STBC and CMIMO. The theoretical performance analysis for the proposed STBC-CMIMO is presented. The performance advantages of the STBC-CMIMO are also shown by simulations. In the simulations, it is demonstrated that STBC-CMIMO can obtain significant performance compared with the existing CMIMO system.

scholarly journals Turbo-Space Time Block Coded and Turbo-Vertical Bell Laboratories Layered Space Time coded Wireless Communication: Which One is better to Use and under What Circumstances?

2019 ◽  
Vol 8 (2) ◽  
pp. 3912-3919
Keyword(s):  
Wireless Communication ◽  
Research Performance ◽  
Multiple Input Multiple Output ◽  
Block Code ◽  
Space Time ◽  
Time Block ◽  
Low Snr ◽  
Multiple Input ◽  
Input Multiple Output ◽  
Turbo Encoder

In this research, performance of Turbo-Space Time Block Coded and Turbo-Vertical Bell Laboratories Layered Space Time coded Multiple Input Multiple Output Wireless Communication System is compared and investigated to find which one is better under which circumstances. The Turbo Encoder accepts binary bits as input and generates turbo encoded bits as output which is sent to 64 QAM modulator. These 64 QAM Modulated symbols are further mapped using Space Time Block Code and Vertical Bell Laboratories Layered Space Time code for Turbo-Space Time Block Coded system and Turbo-Vertical Bell Laboratories Layered Space Time coded system respectively and then divided into several streams based on number of transmit antennas before transmission. It is found that there is 3 to 22 dB coding gain at 10-5 for using Turbo-STBC instead of using Turbo-VBLAST for 2 or 3 or 4 transmit antennas and 2 or 3 or 4 or 5 or 6 receive antennas. On the other hand, at low SNR STBC shows 1-2 b/s/Hz improvement in capacity compare to VBLAST but capacity declines significantly at high SNR for using STBC. It is also observed that VBLAST improves the capacity around 5 to 15 b/s/Hz at high SNR.

scholarly journals A Janus compatible software-defined underwater acoustic multiple-input multiple-output modem

2021 ◽  
Vol 17 (4) ◽  
pp. 155014772110106
Author(s):  
Surinder Singh ◽  
Mark Crispo ◽  
Jean-François Bousquet ◽  
Shadi Aljendi
Keyword(s):  
Transmission Rate ◽  
Multiple Input Multiple Output ◽  
Block Code ◽  
Continuous Phase ◽  
Space Time ◽  
Transmission Mode ◽  
Time Block ◽  
Space Time Block Code ◽  
Multiple Input ◽  
Input Multiple Output

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.

scholarly journals Studying and Modeling the Performance of the TCM-STBC Systems in the Rayleigh Channel

2021 ◽  
Vol 1 ◽  
pp. 1-7
Author(s):  
Mohammed Sofiane Bendelhoum ◽  
Mohamed Rida Lahcene ◽  
Fayssal Menezla ◽  
Abderraouf Elarbi
Keyword(s):  
Communication Systems ◽  
Mimo Systems ◽  
Multiple Input Multiple Output ◽  
Block Code ◽  
Space Time ◽  
Performance Comparison ◽  
Coded Modulation ◽  
Rayleigh Channel ◽  
Input Multiple Output ◽  
Matrix Codes

Multiple-input multiple-output (MIMO) systems will play an important role in future generations of wireless networks. Space-time block code (STBC) and space-time trellis code (STTC) are two techniques that may be used in multi-antenna radio systems. This paper aims, most importantly, to study the performance of STBC systems at different vallues of such parameters as spectral efficiency, matrix codes and constellations. A performance comparison between STBC and STTC schemes is performed. In order to show the efficiency of the system’s ability to communicate with uncoded and coded transmission structures over AWGN and Rayleigh channels, the trellis-coded modulation (TCM) is introduced. The results obtained show that the proposed TCM-STBC system model, using one and two receiving antennas, improves the performance of Rayleigh channel communication systems at 9.5 dB and 11.5 dB for a BER of 10−5

scholarly journals Computation of System Performance of MIMO Technique in Communication Channel using V-BLAST Method

2019 ◽  
Vol 8 (2) ◽  
pp. 898-901
Keyword(s):  
Performance Improvement ◽  
Error Rate ◽  
Communication Channel ◽  
Mimo Systems ◽  
Multiple Input Multiple Output ◽  
Block Codes ◽  
Space Time ◽  
System A ◽  
Multiple Input ◽  
Input Multiple Output

In order to improvement both system performances and data rate Multiple Input Multiple Output techniques play an important role in transmission system. A number of techniques are used to do the needful work for performance improvement in MIMO systems belongs to different block codes, apart from that BLAST architecture are used Such as Diagonal Bell laboratories layered space-time (D-BLAST), Vertical Bell Labs Space-Time Architecture (V-BLAST) method. This work defines the performance improvement using V-BLAST technique in Multiple Input Multiple Output detector. Here we discuss the concept of Multiple Input Multiple Output with BLAST architecture. Depends upon the Bit Error Rate and Frame Error Rate, the comparison is made with the existing methods.

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