Performance analysis of L-PPM modulated NLOS-VLC system with perfect and imperfect CSI

Dixit, Vipul; Kumar, Atul

doi:10.1088/2040-8986/abcea8

Cited by 9 publications

(6 citation statements)

References 29 publications

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“…where 1 h is the height of receivers above the ground. In this analysis only LOS path is considered, as the power received through Non-LOS path is much lower than that of LOS path [19,[24][25]. The direct current (DC) channel gain of LOS path between…”

Section: System Modelmentioning

confidence: 99%

An Exact Error Analysis of Multi-User RC/MRC Based MIMO-NOMA-VLC System With Imperfect SIC

Dixit

Kumar²

2021

IEEE Access

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Visible Light Communication (VLC) has appeared as a breakthrough technology for beyond 5G networks by delivering a broad license free spectrum. In this paper, multiple input multiple output (MIMO) technique is implemented with non-orthogonal multiple access (NOMA-VLC) system in order to develop a robust error-free high rate network for a multi-user scenario. In particular, a generalized multi-user MIMO-NOMA-VLC system with M N  line-of-sight (LOS) links per user is proposed which adopts on-off keying (OOK) modulation for data transmission. A novel closed form expression of probability of error for the proposed system is derived considering a practical scenario of imperfect successive interference cancellation (SIC). This paper also presents the detailed analysis of a three user 2 2  MIMO-NOMA-VLC system and an exact closed form expression of probability of error of this system is derived. The three user 2 2  MIMO-NOMA-VLC system completely outperforms the single input single output (SISO) NOMA-VLC system with same set of parameters. The error performance of the proposed system enhances as the number of photo detectors (PDs) at each user increases. A three user 2 2  MIMO-NOMA-VLC system ensures the best performance at the power allocation co-efficient of 0.3 . The error performance of the proposed system is investigated for the parameters of interest, i.e., distance between the transmitting LEDs and distance between the receiving PDs at each user terminal. The derived probability of error expressions are verified with the simulation results.INDEX TERMS Visible light communication (VLC), Non-orthogonal multiple access (NOMA), Multiple input multiple output (MIMO), Bit-error-rate (BER).

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Section: System Modelmentioning

confidence: 99%

An Exact Error Analysis of Multi-User RC/MRC Based MIMO-NOMA-VLC System With Imperfect SIC

Dixit

Kumar²

2021

IEEE Access

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“…Only LOS link is considered in this analysis as the received power is higher compared to the non-line of sight (NLOS) link. 18,19 The channel gain of LOS link between nth, LED, n ∈ {1, 2} and the mth PD, m ∈ {1, 2, .., M} of kth user, 1 ≤ k ≤ K, is given by References 1,20…”

Section: System Modelmentioning

confidence: 99%

“…For L-PPM modulated user, the symbol error probability (SER) can be obtained using hard decision rule 19 as…”

Section: Imperfect Sic Decodingmentioning

confidence: 99%

“…The location co‐ordinates of two LEDs are

(x_{n}, y_{n}, h) m

n \in false{1, 2 false}

, and

M

PDs at each user are

(x_{m}^{k}, y_{m}^{k}, h_{r}) m

1 \leq k \leq K,

m \in false{1, 2, .., M false}

where

h_{r}

is height of receiver above the floor. Only LOS link is considered in this analysis as the received power is higher compared to the non‐line of sight (NLOS) link 18,19 . The channel gain of LOS link between n th, LED,

n \in false{1, 2 false}

and the m th PD,

m \in false{1, 2, .., M false}

of k th user,

1 \leq k \leq K,

is given by References 1,20

h_{italicmn}^{k} = \frac{false(l + 1 false) A}{2 π d_{italicmn}^{2}} \cos^{l} φ_{italicmn} T (ψ_{mn}) g (ψ_{mn}) \cos (ψ_{mn}),

where

A

is the active area of PD,

l = - \ln 2 / \ln (\cos φ_{1 / 2})

is the Lambertian mode number associated to semi‐angle at half power of LED,

φ_{1 / 2}

…”

Section: System Modelmentioning

confidence: 99%

“…The SLER of this case is given by

\begin{array}{l} P_{slot} ((), (|, \in_{1}^{false(2 false)} = 1) \in_{2}^{false(2 false)} = 1) = {(\frac{L - 1}{L})}^{2} Q ((), χ_{1} ((), P_{1} + 2 P_{2})) Q ((), χ_{1} P_{2}) + ((), \frac{L - 1}{L^{2}}) Q ((), χ_{1} ((), P_{1} - 2 P_{2})) Q ((), χ_{1} P_{2}) \\ + ((), \frac{L - 1}{L^{2}}) Q ((), χ_{1} ((), P_{1} - 2 P_{2})) Q ((), χ_{1} ((), P_{2} - 2 P_{1})) + ((), \frac{1}{L^{2}}) Q ((), χ_{1} ((), P_{1} + 2 P_{2})) Q ((), χ_{1} ((), 2 P_{1} + P_{2})) \end{array}

For L ‐PPM modulated user, the symbol error probability (SER) can be obtained using hard decision rule 19 as

SER = 1 - {(1 - SLER)}^{L} .

Finally, the BER can be obtained using (47) as Reference 19

{normalBER}_{L - PPM} = \frac{L / 2}{L - 1} \times SER .

…”

Section: Error Analysis Of Two‐user L‐ppm‐mimo‐noma‐vlc Systemmentioning

confidence: 99%

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BER performance of MIMO based NOMA‐VLC system with imperfect SIC

Dixit

Kumar

2021

Trans Emerging Tel Tech

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In this article, multiple‐input multiple‐output (MIMO) technique is employed with non‐orthogonal multiple access‐visible light communication (NOMA‐VLC) systems, namely MIMO‐NOMA‐VLC, to develop a low error and high data rate network. In particular, a multi‐user downlink MIMO‐NOMA‐VLC system with equal gain combiner (EGC) at the receiver is proposed. The on‐off keying (OOK) and L‐pulse position modulation (L‐PPM) is adopted for performance analysis. The imperfect successive interference cancellation (SIC) scenario is also considered to emphasize the practicability of the system. The closed‐form expressions for bit‐error‐rate (BER) of the proposed MIMO‐NOMA‐VLC system are derived with perfect and imperfect SIC. Specifically, two and three‐user scenarios are considered for detailed analysis. The MIMO‐NOMA‐VLC system with EGC combiner at the receiver completely outperforms the single‐input single‐output (SISO‐NOMA‐VLC) system. The proposed MIMO‐NOMA‐VLC system provides the best error performance at the power allocation co‐efficient assigned to far user of 0.3. Further, the error performance of the proposed MIMO‐NOMA‐VLC system is investigated for the system parameters such as diversity order, modulation order, user count and so forth. The derived analytical results are verified with the Monte‐Carlo simulation results.

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BER analysis of dynamic FOV based MIMO-NOMA-VLC system

Dixit

Kumar

2021

AEU - International Journal of Electronics and Communications

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Performance analysis of L-PPM modulated NLOS-VLC system with perfect and imperfect CSI

Cited by 9 publications

References 29 publications

An Exact Error Analysis of Multi-User RC/MRC Based MIMO-NOMA-VLC System With Imperfect SIC

An Exact Error Analysis of Multi-User RC/MRC Based MIMO-NOMA-VLC System With Imperfect SIC

BER performance of MIMO based NOMA‐VLC system with imperfect SIC

BER analysis of dynamic FOV based MIMO-NOMA-VLC system

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