Capacity Analysis for Rayleigh/Gamma-Gamma Mixed RF/FSO Link with Fixed-Gain AF Relay

Bag, Banibrata; Das, Akinchan; Chandra, Aniruddha; Bose, Chayanika

doi:10.1587/transcom.2017obp0001

Cited by 16 publications

(12 citation statements)

References 31 publications

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“…The dual-hop structure (the second category) could be divided into four sub-categories. The first sub-category considers a direct link (a backup connection) between source and destination [3,4,5,[15][16][17][18][19][20][21][22][23][24], and the second category does not consider this link [3,15,[20][21][22][24][25][26][27][28][29][30][31][32][33][34][35]. The third sub-category considers single-user scenario [16,17,20,23,24,25,27,30,31,[33][34][35], and the fourth sub-category considers multi-user scenario [3,15,21,24,26,28,29,…”

Section: Related Workmentioning

confidence: 99%

“…However, some works considered M [24,32,36,37], exponential Weibull [21], and alpha-mu [18] distributions. The Rayleigh distribution is mostly used for modelling the fading of line of sight links [3,16,20,24,27,31,[33][34][35], and the Nakagami-m distribution is mostly used for modelling the fading of multi-path links [15, 20-22, 25, 28-30], because they are highly accompanied with the actual results. However, few works considered Rician distribution [26].…”

Section: Related Workmentioning

confidence: 99%

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Performance analysis of a novel hybrid FSO/RF communication system

Amirabadi

Vakili

2020

IET Optoelectronics

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In this paper, a novel dual-hop relay-assisted hybrid Free Space Optical / Radio Frequency (FSO / RF) communication system is presented. In this structure an access point connects users within the building to the Base Station via a hybrid parallel FSO / RF link, this link is proposed firstly. Parallel combination of FSO and RF links and use of an access point, will increase capacity, reliability and data rate of the system. It is the first time that the effect of number of users on the performance of a dualhop relay-assisted hybrid parallel FSO / RF system is investigated. FSO link is considered in Gamma-Gamma atmospheric turbulence with the effect of pointing error and RF link is considered in Rayleigh fading. For the first time, closed-form expressions are derived for Bit Error Rate (BER) and Outage Probability ( ) of the proposed system. Derived expressions are verified through MATLAB simulations. It is shown that the performance of the proposed system is almost independent of atmospheric turbulence intensity, thereby when atmospheric turbulence strengthens, low power consumption is required for maintenance of the system performance. Hence the proposed structure is particularly suitable for mobile communication systems in which a small mobile battery supplies transmitter power. Also the proposed system performance of the system is preferable even at low signal to noise ratio (SNR). Therefore, proposed structure significantly reduces power consumption while maintaining performance of the system.

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Section: Related Workmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

Performance analysis of a novel hybrid FSO/RF communication system

Amirabadi

Vakili

2020

IET Optoelectronics

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“…Few works of this category investigated diversity schemes [25]. The second group examines the performance of the dual-hop structure [2,12,13,15,[30][31][32][33][34][35][36][37][38][39]; in this area, few works used diversity schemes [39]; also parallel transmission was investigated in few works [31]. The third category involves the multi-hop structure [40][41][42][43][44][45].…”

Section: Related Workmentioning

confidence: 99%

Performance evaluation of a novel relay‐assisted hybrid FSO/RF communication system with receive diversity

Amirabadi

Vakili

2019

IET Optoelectronics

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One of the main problems in mobile communication systems is the degradation of Radio Frequency (RF) connection when mobile user is far from base station. One way to solve this problem is to increase the transmitter power, but the mobile transmitter is not able to supply much power. Another way is to use a relay; among relay schemes, amplify and forward is better for long range communications. Amplify and forward relay is not affordable in terms of power consumption and performance, because it consumes a lot of power inefficiently and enhances the noise. Therefore, in other cases, except in the case of long range links, other relay protocols, such as decode and forward, as well as demodulate and forward, are preferable. In this paper, a novel multi-hop hybrid Free Space Optical (FSO) / RF link is presented; it is made up of two main parts. The first part establishes the connection between the mobile user and source base station, and the second part establishes the connection between the source and the destination base stations. In the first part, a mobile user wants to connect to the source base station via a long range link; therefore, a fixed gain amplify and forward relay with multiple receive antennas is used for communication establishment. In the second part, the source and the destination base stations are connected via a multi-hop hybrid parallel FSO / RF link with demodulate and forward relaying. Considering the FSO link in Gamma-Gamma atmospheric turbulence with the effect of pointing error in moderate to strong regime and the Negative Exponential atmospheric turbulence in saturate regime, and the RF link in Rayleigh fading, new closed form exact and asymptotic expressions are derived for the Outage Probability and Bit Error Rate of the proposed structure. Derived expressions are verified with MATLAB simulations. The results show that the performance of the proposed structure does not change with changing channel conditions; therefore, this structure is reliable and does not require more processing or power consumption in order to maintain system performance in poor channel conditions. Hence, the proposed structure is particularly suitable for mobile communications with limitations in power, processing and latency. The innovations and contributions of this paper, which are first introduced in the multi-hop hybrid FSO / RF hybrid structure, include the novelty of the proposed structure, the presentation of new exact and asymptotic mathematical solutions, the use of receive diversity, Bit Error Rate analysis, using amplify and forward as well as decode and forward protocols, taking into account a wide range of atmospheric turbulences with the effect of pointing error, using opportunistic selection and selection combining schemes.The atmospheric turbulence causes the random oscillation of the received signal intensity [5]. Many statistical models have been presented to investigate the effects of atmospheric turbulence including Log-Normal [6], Gamma-Gamma [7], K [8], M [9], and Negative Exponential [10]. Am...

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“…The mixed FSO/RF system provides good performance advantages when operated at high signal‐to‐noise ratio (SNR). Otherwise, the system's performance is severely degraded in case of low SNR [20–34].…”

Section: Introductionmentioning

confidence: 99%

On performance analysis of hybrid FSO/RF systems

Shakir

2019

IET Communications

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Capacity Analysis for Rayleigh/Gamma-Gamma Mixed RF/FSO Link with Fixed-Gain AF Relay

Cited by 16 publications

References 31 publications

Performance analysis of a novel hybrid FSO/RF communication system

Performance analysis of a novel hybrid FSO/RF communication system

Performance evaluation of a novel relay‐assisted hybrid FSO/RF communication system with receive diversity

On performance analysis of hybrid FSO/RF systems

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