Performance Evaluation of a Full-Duplex Relaying-Enabled Satellite Sensor Network
Abstract
:1. Introduction
Satellite Systems
- We first develop an FD-enabled framework for satellite relaying systems by applying the standard recommendations and considering practical antenna geometries, configurations, and channel characteristics. The new diagram of this paper establishes the foundation for system performance evaluation, which can be viewed as a general and extensively applicable model for various scenarios. The employed gamma distribution to approximate the log-normal distribution can result in a suitable statistical model with the same performance for practical interests, and is applicable for a variety of applications in different frequency bands including UHF-band, S-band, L-band, Ku-band and Ka-band.
- Our theoretical derivations provide new analytical expressions for the performance merits of outage probability and ergodic capacity of the FD satellite relaying network, which are general and applicable to cases involving arbitrary channel conditions and system parameters. To the best of our knowledge, this is the first time that such analytical expressions are developed for FD satellite relay systems, which provide an efficient and comprehensive approach to evaluate the considered system performance.
- The representative simulations and comparisons are provided, which clearly reveal the effects of residual SI, channel statistical property, propagation loss, geometric satellite antenna pattern, and terminal elevation angle on the system performance. Our findings indicate that a full-duplex relaying satellite sensor network can achieve a higher capacity than that of traditional half-duplex relaying.
2. System Model
3. Performance Evaluation
3.1. Satellite Channel Model
- : Free space loss between for the uplink and downlink computed as
- : Antenna gain at the ES-.
- : Maximum beam gain at the on-board antenna boresight.
- : Auxiliary variable in determining the on-board beam gain factor for a given a ES’s position, which is defined as [25]
- : Fading channel coefficient of the satellite links. Among the different atmosphere effects, rain attenuation is regarded as the major impairment which is commonly described as a log-normal distribution. However, in a practical scenario of the existing literature, the application of log-normal distribution in modeling the shadowing fading would lead to a quite complicated expressions for characterizing the key merits of both the first- and second-order statistical properties [26]. On the other hand, the shadowed-Rician model proposed originally in [26], which adopts the gamma distribution to approximate the log-normal distribution, can result in a simpler form for channel statistics with the similar performance for practical cases. As can be found in the existing literature, the shadowed-Rician distribution can be applied in difference frequency bands, including UHF-band, L-band, Ku-band, Ka-band and etc [7,8,9]. Under this situation, this paper has employed an alternative approach for atmosphere and weather effects according to the existing references, which can be applied to both the fixed and mobile terminals operating in various propagation environments [7,8,9,23,24,25]. Accordingly, the probability density function (PDF) of the channel gain can be given by [26]
3.2. Outage Probability
3.3. Ergodic Capacity
4. Numerical Results
5. Discussion
Author Contributions
Funding
Conflicts of Interest
Abbreviations
FD | Full-duplex |
HD | Half-duplex |
AF | amplify-and-forward |
DF | decode-and-forward |
OP | outage probability |
SNRs | signal-to-noise ratios |
LOS | line-of-sight |
probability distribution function | |
CDF | cumulative distortion function |
FHS | Frequent heavy shadowing |
AS | Average shadowing |
ILS | Infrequent light shadowing |
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Error Probability | Cancellation Performance |
---|---|
0.5% | 46 dB |
1% | 40 dB |
2% | 34 dB |
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Xia, X.; Yang, B.; Liu, Z.; An, K.; Guo, K. Performance Evaluation of a Full-Duplex Relaying-Enabled Satellite Sensor Network. Sensors 2019, 19, 5453. https://doi.org/10.3390/s19245453
Xia X, Yang B, Liu Z, An K, Guo K. Performance Evaluation of a Full-Duplex Relaying-Enabled Satellite Sensor Network. Sensors. 2019; 19(24):5453. https://doi.org/10.3390/s19245453
Chicago/Turabian StyleXia, Xigang, Bo Yang, Zhiyu Liu, Kang An, and Kefeng Guo. 2019. "Performance Evaluation of a Full-Duplex Relaying-Enabled Satellite Sensor Network" Sensors 19, no. 24: 5453. https://doi.org/10.3390/s19245453
APA StyleXia, X., Yang, B., Liu, Z., An, K., & Guo, K. (2019). Performance Evaluation of a Full-Duplex Relaying-Enabled Satellite Sensor Network. Sensors, 19(24), 5453. https://doi.org/10.3390/s19245453