Performance Evaluation of LDPC-Coded Power Series Based Málaga (Ḿ) Distributed MIMO/FSO Link With M-QAM and Pointing Error
In this work, the performance evaluation of Low-Density-Parity-Check (LDPC) based Multiple Input Multiple Output (MIMO) Orthogonal Frequency Division Multiplexing (OFDM) based Free Space Optical (FSO) link with Málaga (Ḿ) channel model is analyzed. The performance in terms of G...
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IEEE
2022-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/9791302/ |
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| author | D. Anandkumar R. G. Sangeetha |
| author_facet | D. Anandkumar R. G. Sangeetha |
| author_sort | D. Anandkumar |
| collection | DOAJ |
| description | In this work, the performance evaluation of Low-Density-Parity-Check (LDPC) based Multiple Input Multiple Output (MIMO) Orthogonal Frequency Division Multiplexing (OFDM) based Free Space Optical (FSO) link with Málaga (Ḿ) channel model is analyzed. The performance in terms of Gain (diversity and combining) analysis <inline-formula> <tex-math notation="LaTeX">$\delta \text{G}$ </tex-math></inline-formula> (N, M) and Bit Error Rate (BER), outage probability, ergodic capacity, spectral efficiency and Link distance (L) concerning Signal to Noise Ratio (SNR) is evaluated. The Meijer-G function gives complexity in MIMO mathematical analysis. As a solution, a new Probability Density Function (PDF) based on power series representation has been proposed with M-Quadrature Amplitude Modulation <inline-formula> <tex-math notation="LaTeX">$(M-ary\,\,QAM)$ </tex-math></inline-formula>. With the proposed PDF, the closed-form Bit Error Rate (BER) derivation, Asymptotic BER derivation, Outage probability expression are derived, and the enhancement is observed for the MIMO/OFDM link in terms of Bit Error Rate (BER) and Signal to Noise Ratio (SNR) with pointing error (PE) and atmospheric turbulence (AT). The Maximal Ratio Combining (MRC) achieves a gain of 3.5dB and 7.8dB SNR gain over Equal Gain Combining (EGC) and Selection Combining (SC) scheme for negligible Pointing Error (PE), i.e., <inline-formula> <tex-math notation="LaTeX">$\xi =10.15$ </tex-math></inline-formula> at BER 10<sup>−6</sup>. The proposed PDF, along with M-QAM and Málaga (Ḿ) distribution offers power efficiency, reduction in BER, and high SNR gain compared to Single Input Single Output (SISO) and Single Input Multiple Output (SIMO) Free Space Optical (FSO) link. The regular LDPC coding techniques are adopted with a 1/2 code rate and applied to simulation results to obtain high coding gain. The proposed MIMO/FSO link provides high SNR gain of 5dB and transmission link distance of 12km over SIMO and SISO FSO link. This work gives the in-depth analysis of vital factors affecting the FSO link performance and helps in mitigating them to analyze and design an effective system and opens widely for digital applications like smart city application, 5G and beyond 5G, Internet of Things (IoT), railway and defense applications, etc., |
| first_indexed | 2024-04-13T18:08:54Z |
| format | Article |
| id | doaj.art-09c61529bb054fbe9ca5cf56b1090a84 |
| institution | Directory Open Access Journal |
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| language | English |
| last_indexed | 2024-04-13T18:08:54Z |
| publishDate | 2022-01-01 |
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| spelling | doaj.art-09c61529bb054fbe9ca5cf56b1090a842022-12-22T02:35:58ZengIEEEIEEE Access2169-35362022-01-0110620376205510.1109/ACCESS.2022.31808359791302Performance Evaluation of LDPC-Coded Power Series Based Málaga (Ḿ) Distributed MIMO/FSO Link With M-QAM and Pointing ErrorD. Anandkumar0R. G. Sangeetha1https://orcid.org/0000-0001-9818-8934School of Electronics Engineering, Vellore Institute of Technology, Chennai Campus, Chennai, IndiaSchool of Electronics Engineering, Vellore Institute of Technology, Chennai Campus, Chennai, IndiaIn this work, the performance evaluation of Low-Density-Parity-Check (LDPC) based Multiple Input Multiple Output (MIMO) Orthogonal Frequency Division Multiplexing (OFDM) based Free Space Optical (FSO) link with Málaga (Ḿ) channel model is analyzed. The performance in terms of Gain (diversity and combining) analysis <inline-formula> <tex-math notation="LaTeX">$\delta \text{G}$ </tex-math></inline-formula> (N, M) and Bit Error Rate (BER), outage probability, ergodic capacity, spectral efficiency and Link distance (L) concerning Signal to Noise Ratio (SNR) is evaluated. The Meijer-G function gives complexity in MIMO mathematical analysis. As a solution, a new Probability Density Function (PDF) based on power series representation has been proposed with M-Quadrature Amplitude Modulation <inline-formula> <tex-math notation="LaTeX">$(M-ary\,\,QAM)$ </tex-math></inline-formula>. With the proposed PDF, the closed-form Bit Error Rate (BER) derivation, Asymptotic BER derivation, Outage probability expression are derived, and the enhancement is observed for the MIMO/OFDM link in terms of Bit Error Rate (BER) and Signal to Noise Ratio (SNR) with pointing error (PE) and atmospheric turbulence (AT). The Maximal Ratio Combining (MRC) achieves a gain of 3.5dB and 7.8dB SNR gain over Equal Gain Combining (EGC) and Selection Combining (SC) scheme for negligible Pointing Error (PE), i.e., <inline-formula> <tex-math notation="LaTeX">$\xi =10.15$ </tex-math></inline-formula> at BER 10<sup>−6</sup>. The proposed PDF, along with M-QAM and Málaga (Ḿ) distribution offers power efficiency, reduction in BER, and high SNR gain compared to Single Input Single Output (SISO) and Single Input Multiple Output (SIMO) Free Space Optical (FSO) link. The regular LDPC coding techniques are adopted with a 1/2 code rate and applied to simulation results to obtain high coding gain. The proposed MIMO/FSO link provides high SNR gain of 5dB and transmission link distance of 12km over SIMO and SISO FSO link. This work gives the in-depth analysis of vital factors affecting the FSO link performance and helps in mitigating them to analyze and design an effective system and opens widely for digital applications like smart city application, 5G and beyond 5G, Internet of Things (IoT), railway and defense applications, etc.,https://ieeexplore.ieee.org/document/9791302/Málaga (Ḿ)(<italic xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">M</italic>-<italic xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">ary QAM</italic>)pointing erroratmospheric turbulencepower seriesBER |
| spellingShingle | D. Anandkumar R. G. Sangeetha Performance Evaluation of LDPC-Coded Power Series Based Málaga (Ḿ) Distributed MIMO/FSO Link With M-QAM and Pointing Error IEEE Access Málaga (Ḿ) (<italic xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">M</italic>-<italic xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">ary QAM</italic>) pointing error atmospheric turbulence power series BER |
| title | Performance Evaluation of LDPC-Coded Power Series Based Málaga (Ḿ) Distributed MIMO/FSO Link With M-QAM and Pointing Error |
| title_full | Performance Evaluation of LDPC-Coded Power Series Based Málaga (Ḿ) Distributed MIMO/FSO Link With M-QAM and Pointing Error |
| title_fullStr | Performance Evaluation of LDPC-Coded Power Series Based Málaga (Ḿ) Distributed MIMO/FSO Link With M-QAM and Pointing Error |
| title_full_unstemmed | Performance Evaluation of LDPC-Coded Power Series Based Málaga (Ḿ) Distributed MIMO/FSO Link With M-QAM and Pointing Error |
| title_short | Performance Evaluation of LDPC-Coded Power Series Based Málaga (Ḿ) Distributed MIMO/FSO Link With M-QAM and Pointing Error |
| title_sort | performance evaluation of ldpc coded power series based m x00e1 laga x1e3e distributed mimo fso link with m qam and pointing error |
| topic | Málaga (Ḿ) (<italic xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">M</italic>-<italic xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">ary QAM</italic>) pointing error atmospheric turbulence power series BER |
| url | https://ieeexplore.ieee.org/document/9791302/ |
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