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Diversity Performance Analysis on Multiple HAP Networks.

Dong F, Li M, Gong X, Li H, Gao F - Sensors (Basel) (2015)

Bottom Line: Multiple-input multiple-output (MIMO) techniques provide the diversity and multiplexing gain, which can improve the network performance effectively.The simulation results validate the effectiveness of the performance analysis.It is shown that the performance of the HAPs network in WSNs can be significantly improved by utilizing the MAV to achieve overlapping coverage, with the help of the V-MIMO techniques.

View Article: PubMed Central - PubMed

Affiliation: College of Communications Engineering, PLA University of Science and Technology, 88 Houbiaoying Rd., Nanjing 210007, China. dfh_sinlab@hotmail.com.

ABSTRACT
One of the main design challenges in wireless sensor networks (WSNs) is achieving a high-data-rate transmission for individual sensor devices. The high altitude platform (HAP) is an important communication relay platform for WSNs and next-generation wireless networks. Multiple-input multiple-output (MIMO) techniques provide the diversity and multiplexing gain, which can improve the network performance effectively. In this paper, a virtual MIMO (V-MIMO) model is proposed by networking multiple HAPs with the concept of multiple assets in view (MAV). In a shadowed Rician fading channel, the diversity performance is investigated. The probability density function (PDF) and cumulative distribution function (CDF) of the received signal-to-noise ratio (SNR) are derived. In addition, the average symbol error rate (ASER) with BPSK and QPSK is given for the V-MIMO model. The system capacity is studied for both perfect channel state information (CSI) and unknown CSI individually. The ergodic capacity with various SNR and Rician factors for different network configurations is also analyzed. The simulation results validate the effectiveness of the performance analysis. It is shown that the performance of the HAPs network in WSNs can be significantly improved by utilizing the MAV to achieve overlapping coverage, with the help of the V-MIMO techniques.

No MeSH data available.


Related in: MedlinePlus

Outage probability versus the average SNR with various HAP and user antenna configurations (γth = 10 dB).
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f4-sensors-15-15398: Outage probability versus the average SNR with various HAP and user antenna configurations (γth = 10 dB).

Mentions: The PDF and CDF of the received SNR under different HAPs and user antenna configurations are shown in Figures 2 and 3, respectively. Figures 4 and 5 depict the outage probability versus the average SNR γ and SNR threshold γth. The ASER for BPSK and QPSK is given in Figures 6 and 7 respectively. The ergodic capacity with various SNR under different HAP and user antenna configurations is shown in Figure 8, for both perfect CSI and unknown CSI. Finally, the ergodic capacity with various Rician factors κ is depicted in Figure 9 under different SNR conditions. A comprehensive analysis of the diversity reception performance in multiple HAP networks is described. In all the figures below, the label (NH, Nr) denotes the number of HAPs and the number of receiver antennas. Since it is assumed that each HAP installs one downlink antenna, the number of transmitter antennas is equal to the number of HAPs NH. Figures 2, 3, 4 and 5 depict the results of analysis and Monte Carlo, respectively. We run the simulated program 104 times and take the average of results to observe whether the Monte Carlo results are consistent with the performance analysis. In each time, the channel matrix is generated randomly with the same parameters.


Diversity Performance Analysis on Multiple HAP Networks.

Dong F, Li M, Gong X, Li H, Gao F - Sensors (Basel) (2015)

Outage probability versus the average SNR with various HAP and user antenna configurations (γth = 10 dB).
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4541836&req=5

f4-sensors-15-15398: Outage probability versus the average SNR with various HAP and user antenna configurations (γth = 10 dB).
Mentions: The PDF and CDF of the received SNR under different HAPs and user antenna configurations are shown in Figures 2 and 3, respectively. Figures 4 and 5 depict the outage probability versus the average SNR γ and SNR threshold γth. The ASER for BPSK and QPSK is given in Figures 6 and 7 respectively. The ergodic capacity with various SNR under different HAP and user antenna configurations is shown in Figure 8, for both perfect CSI and unknown CSI. Finally, the ergodic capacity with various Rician factors κ is depicted in Figure 9 under different SNR conditions. A comprehensive analysis of the diversity reception performance in multiple HAP networks is described. In all the figures below, the label (NH, Nr) denotes the number of HAPs and the number of receiver antennas. Since it is assumed that each HAP installs one downlink antenna, the number of transmitter antennas is equal to the number of HAPs NH. Figures 2, 3, 4 and 5 depict the results of analysis and Monte Carlo, respectively. We run the simulated program 104 times and take the average of results to observe whether the Monte Carlo results are consistent with the performance analysis. In each time, the channel matrix is generated randomly with the same parameters.

Bottom Line: Multiple-input multiple-output (MIMO) techniques provide the diversity and multiplexing gain, which can improve the network performance effectively.The simulation results validate the effectiveness of the performance analysis.It is shown that the performance of the HAPs network in WSNs can be significantly improved by utilizing the MAV to achieve overlapping coverage, with the help of the V-MIMO techniques.

View Article: PubMed Central - PubMed

Affiliation: College of Communications Engineering, PLA University of Science and Technology, 88 Houbiaoying Rd., Nanjing 210007, China. dfh_sinlab@hotmail.com.

ABSTRACT
One of the main design challenges in wireless sensor networks (WSNs) is achieving a high-data-rate transmission for individual sensor devices. The high altitude platform (HAP) is an important communication relay platform for WSNs and next-generation wireless networks. Multiple-input multiple-output (MIMO) techniques provide the diversity and multiplexing gain, which can improve the network performance effectively. In this paper, a virtual MIMO (V-MIMO) model is proposed by networking multiple HAPs with the concept of multiple assets in view (MAV). In a shadowed Rician fading channel, the diversity performance is investigated. The probability density function (PDF) and cumulative distribution function (CDF) of the received signal-to-noise ratio (SNR) are derived. In addition, the average symbol error rate (ASER) with BPSK and QPSK is given for the V-MIMO model. The system capacity is studied for both perfect channel state information (CSI) and unknown CSI individually. The ergodic capacity with various SNR and Rician factors for different network configurations is also analyzed. The simulation results validate the effectiveness of the performance analysis. It is shown that the performance of the HAPs network in WSNs can be significantly improved by utilizing the MAV to achieve overlapping coverage, with the help of the V-MIMO techniques.

No MeSH data available.


Related in: MedlinePlus