Performance analysis of downlink multipath multi-user NOMA-VLC system
In the present paper, we have investigated performance of Non-Orthogonal Multiple Access based downlink multipath multi-user Visible Light Communication System. The Bit Error Rate (BER), sum rate and outage probability have been simulated using Line-Of-Sight (LOS) and LOS plus first reflection (L-R1...
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| description | In the present paper, we have investigated performance of Non-Orthogonal Multiple Access based downlink multipath multi-user Visible Light Communication System. The Bit Error Rate (BER), sum rate and outage probability have been simulated using Line-Of-Sight (LOS) and LOS plus first reflection (L-R1) signal for two-user and three-user system. The simulation has been carried out for different values of semi-angle
φ
1
/
2
of the LED i.e.
30
∘
,
50
∘
and 70
∘
. In the two-user system, the LOS simulation result shows that the error probability is 7.49 × 10
−3
, 4.88 × 10
−3
and 1.03 × 10
−1
when
φ
1
/
2
equals to70
∘
, 50° and
30
∘
respectively for user-1. And for user-2, the BER is found to be 4.89 × 10
−2
, 5.84 × 10
−2
and 3.73 × 10
−1
using
φ
1
/
2
equals to70
∘
,
50
∘
and
30
∘
. Thus, the optimal semi-angle
φ
1
/
2
for user-1 and user-2 using LOS signal is
50
∘
, 70
∘
respectively. However, for the three-user system, the error probability increases when compared to two-user system and the optimal values of semi-angle for user-1 changes to
30
∘
and for user-2 & user-3, it is 70
∘
. Moreover, in two-user system with L-R1 signal, the optimal value is 70
∘
for both user-1 and user-2. The SIC method fails to decode the user’s signal when number of users increases to three in L-R1 signal case. Further, with the far user power allocation coefficient equal to 0.8, the average BER is found to be minimum for two-user system. The sum rate vs. normalized offset has been simulated for different values of semi-angle of the LED. The investigation shows that the maximum sum rate of 278.84 Mbps is achieved at
φ
1
/
2
equals to
50
∘
for the two-user system using LOS signal. We have also examined the effect of shadowing (blocked LOS signal) and found that sum rate is almost zero for small values of
φ
1
/
2
i.e.
20
∘
and
30
∘
. Finally, for the semi-angle value of
30
∘
the outage probability (for target rate beyond 3bps/Hz) reaches to 100 percent for both users. |
| doi_str_mv | 10.1007/s11082-022-04068-x |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_journals_2707899510</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>2707899510</sourcerecordid><originalsourceid>FETCH-LOGICAL-c293t-f6844034ee26826bf185f19a415cbf45ed597a775099d4bacb09b43f218e8dd43</originalsourceid><addsrcrecordid>eNp9kMtOwzAQRS0EEqXwA6wisTaMHTu2l1VVHlJ5LACxs5zEhpQ0KZ5EtH9PIEjsWIxmFudejQ4hpwzOGYC6QMZAcwp8GAGZpts9MmFScaqZetknE0gho9owc0iOEFcAkAkJE7J48DG0ce2awieucfUOK0zakJTtZ1NXzXuy7uuu2rjubbxojz4md_e3M_q8nCe4w86vj8lBcDX6k989JU-Xi8f5NV3eX93MZ0tacJN2NGRaCEiF9zzTPMsD0zIw4wSTRR6E9KU0yiklwZhS5K7IweQiDZxpr8tSpFNyNvZuYvvRe-zsqu3j8DVarkBpYySDgeIjVcQWMfpgN7Fau7izDOy3LjvqsoMu-6PLbodQOoZwgJtXH_-q_0l9AbfBbXE</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>2707899510</pqid></control><display><type>article</type><title>Performance analysis of downlink multipath multi-user NOMA-VLC system</title><source>SpringerLink (Online service)</source><creator>Kumar, Ajit ; Sharan, N. ; Ghorai, S. K.</creator><creatorcontrib>Kumar, Ajit ; Sharan, N. ; Ghorai, S. K.</creatorcontrib><description>In the present paper, we have investigated performance of Non-Orthogonal Multiple Access based downlink multipath multi-user Visible Light Communication System. The Bit Error Rate (BER), sum rate and outage probability have been simulated using Line-Of-Sight (LOS) and LOS plus first reflection (L-R1) signal for two-user and three-user system. The simulation has been carried out for different values of semi-angle
φ
1
/
2
of the LED i.e.
30
∘
,
50
∘
and 70
∘
. In the two-user system, the LOS simulation result shows that the error probability is 7.49 × 10
−3
, 4.88 × 10
−3
and 1.03 × 10
−1
when
φ
1
/
2
equals to70
∘
, 50° and
30
∘
respectively for user-1. And for user-2, the BER is found to be 4.89 × 10
−2
, 5.84 × 10
−2
and 3.73 × 10
−1
using
φ
1
/
2
equals to70
∘
,
50
∘
and
30
∘
. Thus, the optimal semi-angle
φ
1
/
2
for user-1 and user-2 using LOS signal is
50
∘
, 70
∘
respectively. However, for the three-user system, the error probability increases when compared to two-user system and the optimal values of semi-angle for user-1 changes to
30
∘
and for user-2 & user-3, it is 70
∘
. Moreover, in two-user system with L-R1 signal, the optimal value is 70
∘
for both user-1 and user-2. The SIC method fails to decode the user’s signal when number of users increases to three in L-R1 signal case. Further, with the far user power allocation coefficient equal to 0.8, the average BER is found to be minimum for two-user system. The sum rate vs. normalized offset has been simulated for different values of semi-angle of the LED. The investigation shows that the maximum sum rate of 278.84 Mbps is achieved at
φ
1
/
2
equals to
50
∘
for the two-user system using LOS signal. We have also examined the effect of shadowing (blocked LOS signal) and found that sum rate is almost zero for small values of
φ
1
/
2
i.e.
20
∘
and
30
∘
. Finally, for the semi-angle value of
30
∘
the outage probability (for target rate beyond 3bps/Hz) reaches to 100 percent for both users.</description><identifier>ISSN: 0306-8919</identifier><identifier>EISSN: 1572-817X</identifier><identifier>DOI: 10.1007/s11082-022-04068-x</identifier><language>eng</language><publisher>New York: Springer US</publisher><subject>Bit error rate ; Characterization and Evaluation of Materials ; Communications systems ; Computer Communication Networks ; Downlinking ; Electrical Engineering ; Errors ; Lasers ; Line of sight ; Nonorthogonal multiple access ; Optical communication ; Optical Devices ; Optics ; Outages ; Photonics ; Physics ; Physics and Astronomy ; Signal reflection ; Simulation</subject><ispartof>Optical and quantum electronics, 2022-10, Vol.54 (10), Article 660</ispartof><rights>The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2022. Springer Nature or its licensor holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c293t-f6844034ee26826bf185f19a415cbf45ed597a775099d4bacb09b43f218e8dd43</citedby><cites>FETCH-LOGICAL-c293t-f6844034ee26826bf185f19a415cbf45ed597a775099d4bacb09b43f218e8dd43</cites><orcidid>0000-0001-7042-5475</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s11082-022-04068-x$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s11082-022-04068-x$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,780,784,27924,27925,41488,42557,51319</link.rule.ids></links><search><creatorcontrib>Kumar, Ajit</creatorcontrib><creatorcontrib>Sharan, N.</creatorcontrib><creatorcontrib>Ghorai, S. K.</creatorcontrib><title>Performance analysis of downlink multipath multi-user NOMA-VLC system</title><title>Optical and quantum electronics</title><addtitle>Opt Quant Electron</addtitle><description>In the present paper, we have investigated performance of Non-Orthogonal Multiple Access based downlink multipath multi-user Visible Light Communication System. The Bit Error Rate (BER), sum rate and outage probability have been simulated using Line-Of-Sight (LOS) and LOS plus first reflection (L-R1) signal for two-user and three-user system. The simulation has been carried out for different values of semi-angle
φ
1
/
2
of the LED i.e.
30
∘
,
50
∘
and 70
∘
. In the two-user system, the LOS simulation result shows that the error probability is 7.49 × 10
−3
, 4.88 × 10
−3
and 1.03 × 10
−1
when
φ
1
/
2
equals to70
∘
, 50° and
30
∘
respectively for user-1. And for user-2, the BER is found to be 4.89 × 10
−2
, 5.84 × 10
−2
and 3.73 × 10
−1
using
φ
1
/
2
equals to70
∘
,
50
∘
and
30
∘
. Thus, the optimal semi-angle
φ
1
/
2
for user-1 and user-2 using LOS signal is
50
∘
, 70
∘
respectively. However, for the three-user system, the error probability increases when compared to two-user system and the optimal values of semi-angle for user-1 changes to
30
∘
and for user-2 & user-3, it is 70
∘
. Moreover, in two-user system with L-R1 signal, the optimal value is 70
∘
for both user-1 and user-2. The SIC method fails to decode the user’s signal when number of users increases to three in L-R1 signal case. Further, with the far user power allocation coefficient equal to 0.8, the average BER is found to be minimum for two-user system. The sum rate vs. normalized offset has been simulated for different values of semi-angle of the LED. The investigation shows that the maximum sum rate of 278.84 Mbps is achieved at
φ
1
/
2
equals to
50
∘
for the two-user system using LOS signal. We have also examined the effect of shadowing (blocked LOS signal) and found that sum rate is almost zero for small values of
φ
1
/
2
i.e.
20
∘
and
30
∘
. Finally, for the semi-angle value of
30
∘
the outage probability (for target rate beyond 3bps/Hz) reaches to 100 percent for both users.</description><subject>Bit error rate</subject><subject>Characterization and Evaluation of Materials</subject><subject>Communications systems</subject><subject>Computer Communication Networks</subject><subject>Downlinking</subject><subject>Electrical Engineering</subject><subject>Errors</subject><subject>Lasers</subject><subject>Line of sight</subject><subject>Nonorthogonal multiple access</subject><subject>Optical communication</subject><subject>Optical Devices</subject><subject>Optics</subject><subject>Outages</subject><subject>Photonics</subject><subject>Physics</subject><subject>Physics and Astronomy</subject><subject>Signal reflection</subject><subject>Simulation</subject><issn>0306-8919</issn><issn>1572-817X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><recordid>eNp9kMtOwzAQRS0EEqXwA6wisTaMHTu2l1VVHlJ5LACxs5zEhpQ0KZ5EtH9PIEjsWIxmFudejQ4hpwzOGYC6QMZAcwp8GAGZpts9MmFScaqZetknE0gho9owc0iOEFcAkAkJE7J48DG0ce2awieucfUOK0zakJTtZ1NXzXuy7uuu2rjubbxojz4md_e3M_q8nCe4w86vj8lBcDX6k989JU-Xi8f5NV3eX93MZ0tacJN2NGRaCEiF9zzTPMsD0zIw4wSTRR6E9KU0yiklwZhS5K7IweQiDZxpr8tSpFNyNvZuYvvRe-zsqu3j8DVarkBpYySDgeIjVcQWMfpgN7Fau7izDOy3LjvqsoMu-6PLbodQOoZwgJtXH_-q_0l9AbfBbXE</recordid><startdate>20221001</startdate><enddate>20221001</enddate><creator>Kumar, Ajit</creator><creator>Sharan, N.</creator><creator>Ghorai, S. K.</creator><general>Springer US</general><general>Springer Nature B.V</general><scope>AAYXX</scope><scope>CITATION</scope><orcidid>https://orcid.org/0000-0001-7042-5475</orcidid></search><sort><creationdate>20221001</creationdate><title>Performance analysis of downlink multipath multi-user NOMA-VLC system</title><author>Kumar, Ajit ; Sharan, N. ; Ghorai, S. K.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c293t-f6844034ee26826bf185f19a415cbf45ed597a775099d4bacb09b43f218e8dd43</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2022</creationdate><topic>Bit error rate</topic><topic>Characterization and Evaluation of Materials</topic><topic>Communications systems</topic><topic>Computer Communication Networks</topic><topic>Downlinking</topic><topic>Electrical Engineering</topic><topic>Errors</topic><topic>Lasers</topic><topic>Line of sight</topic><topic>Nonorthogonal multiple access</topic><topic>Optical communication</topic><topic>Optical Devices</topic><topic>Optics</topic><topic>Outages</topic><topic>Photonics</topic><topic>Physics</topic><topic>Physics and Astronomy</topic><topic>Signal reflection</topic><topic>Simulation</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Kumar, Ajit</creatorcontrib><creatorcontrib>Sharan, N.</creatorcontrib><creatorcontrib>Ghorai, S. K.</creatorcontrib><collection>CrossRef</collection><jtitle>Optical and quantum electronics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Kumar, Ajit</au><au>Sharan, N.</au><au>Ghorai, S. K.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Performance analysis of downlink multipath multi-user NOMA-VLC system</atitle><jtitle>Optical and quantum electronics</jtitle><stitle>Opt Quant Electron</stitle><date>2022-10-01</date><risdate>2022</risdate><volume>54</volume><issue>10</issue><artnum>660</artnum><issn>0306-8919</issn><eissn>1572-817X</eissn><abstract>In the present paper, we have investigated performance of Non-Orthogonal Multiple Access based downlink multipath multi-user Visible Light Communication System. The Bit Error Rate (BER), sum rate and outage probability have been simulated using Line-Of-Sight (LOS) and LOS plus first reflection (L-R1) signal for two-user and three-user system. The simulation has been carried out for different values of semi-angle
φ
1
/
2
of the LED i.e.
30
∘
,
50
∘
and 70
∘
. In the two-user system, the LOS simulation result shows that the error probability is 7.49 × 10
−3
, 4.88 × 10
−3
and 1.03 × 10
−1
when
φ
1
/
2
equals to70
∘
, 50° and
30
∘
respectively for user-1. And for user-2, the BER is found to be 4.89 × 10
−2
, 5.84 × 10
−2
and 3.73 × 10
−1
using
φ
1
/
2
equals to70
∘
,
50
∘
and
30
∘
. Thus, the optimal semi-angle
φ
1
/
2
for user-1 and user-2 using LOS signal is
50
∘
, 70
∘
respectively. However, for the three-user system, the error probability increases when compared to two-user system and the optimal values of semi-angle for user-1 changes to
30
∘
and for user-2 & user-3, it is 70
∘
. Moreover, in two-user system with L-R1 signal, the optimal value is 70
∘
for both user-1 and user-2. The SIC method fails to decode the user’s signal when number of users increases to three in L-R1 signal case. Further, with the far user power allocation coefficient equal to 0.8, the average BER is found to be minimum for two-user system. The sum rate vs. normalized offset has been simulated for different values of semi-angle of the LED. The investigation shows that the maximum sum rate of 278.84 Mbps is achieved at
φ
1
/
2
equals to
50
∘
for the two-user system using LOS signal. We have also examined the effect of shadowing (blocked LOS signal) and found that sum rate is almost zero for small values of
φ
1
/
2
i.e.
20
∘
and
30
∘
. Finally, for the semi-angle value of
30
∘
the outage probability (for target rate beyond 3bps/Hz) reaches to 100 percent for both users.</abstract><cop>New York</cop><pub>Springer US</pub><doi>10.1007/s11082-022-04068-x</doi><orcidid>https://orcid.org/0000-0001-7042-5475</orcidid><oa>free_for_read</oa></addata></record> |
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| language | eng |
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| source | SpringerLink (Online service) |
| subjects | Bit error rate Characterization and Evaluation of Materials Communications systems Computer Communication Networks Downlinking Electrical Engineering Errors Lasers Line of sight Nonorthogonal multiple access Optical communication Optical Devices Optics Outages Photonics Physics Physics and Astronomy Signal reflection Simulation |
| title | Performance analysis of downlink multipath multi-user NOMA-VLC system |
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