NOMA-Based Irregular Repetition Slotted ALOHA for Satellite Networks

Shao, Xinye; Sun, Zhili; Yang, Mingchuan; Gu, Sai; Guo, Qing

doi:10.1109/lcomm.2019.2900319

Cited by 46 publications

(21 citation statements)

References 10 publications

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“…In [4], by introducing a graph representation of the IC process, the iterative IC convergence and PLR performance can be derived by means of the graph-based DE analysis. Literature [5] also show that the PLR of IRSA with transmit power diversity by introducing DE analysis with directly decoded probability. According to the results in [4]- [5], let d λ denote the probability that an edge is combined to a degreed packet nodes (PN), which can be computed as…”

Section: Density Evolution Analysismentioning

confidence: 99%

“…Literature [5] also show that the PLR of IRSA with transmit power diversity by introducing DE analysis with directly decoded probability. According to the results in [4]- [5], let d λ denote the probability that an edge is combined to a degreed packet nodes (PN), which can be computed as…”

Section: Density Evolution Analysismentioning

confidence: 99%

“…r and max q ; the second constraint decides an PLR upper bound PLR ; the third restraint determines that the sum of all transmit packet probability levels is equal to one; the fourth constraint determines the range of d Λ and d . The problem (15) can be directly resolved by utilizing the differential evolution algorithm [13], which is also utilized in many existing literature, such as [4], [5]. Note that the optimal degree distribution can bring about the throughput maximization.…”

Section: Degree Distribution Optimizationmentioning

confidence: 99%

“…To further improve the throughput of IRSA, literature [5] proposed a power domain NOMA-IRSA to reduce the number of unresolved collision patterns. In this protocol, packets of each SMT can be transmitted with different power levels, and degree distributions with different number of power levels are optimized.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Enhancing Irregular Repetition Slotted ALOHA with Polarization Diversity in LEO Satellite Networks

Su¹,

Ren²,

Zhao³

et al. 2020

KSII TIIS

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An enhanced irregular repetition slotted ALOHA (IRSA) protocol is proposed by using polarization characteristic of satellite link and MIMO detection in low earth orbit (LEO) satellite networks, which is dubbed polarized MIMO IRSA (PM-IRSA). In the proposed scheme, one or two packets in one slot can be decoded by employing polarized MIMO detection, and more than two collided packets in multiple slots which can construct the virtual MIMO model can be decoded by the MIMO detection algorithm. The performance of the proposed scheme is analyzed with the density evolution (DE) approach and the degree distribution is optimized to maximize the system throughput by using a differential evolution. Numerical results certify our analysis and show that the normalized throughput of the proposed PM-IRSA can achieve 1.89 bits/symbol.

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Section: Density Evolution Analysismentioning

confidence: 99%

Section: Density Evolution Analysismentioning

confidence: 99%

Section: Degree Distribution Optimizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Enhancing Irregular Repetition Slotted ALOHA with Polarization Diversity in LEO Satellite Networks

Su¹,

Ren²,

Zhao³

et al. 2020

KSII TIIS

View full text Add to dashboard Cite

show abstract

“…As the number of satellite users grows dramatically, the system will be facing the risk of spectral resource shortage in the future [11]. In this case, many studies have focused on the improvement of spectral efficiency [12]- [14]. Inspired by the power domain non-orthogonal multiple access (PD-NOMA) method in 5G, Shao et al [12] proposed a power domainaided ALOHA in the uplink satellite channel.…”

Section: Introductionmentioning

confidence: 99%

A Power Domain Multiplexing Based Co-Carrier Transmission Method in Hybrid Satellite Communication Networks

2020

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Power domain non-orthogonal multiple access (PD-NOMA) has been widely recognized a spectrum-efficient multiuser transmission method when the channel gains across different users vary obviously. Due to the long travel distance between the space and the Earth in satellite communication scenarios, the advantages from PD-NOMA will disappear since the signals experience almost the same path loss. However, in hybrid satellite networks, terrestrial users equipped with different size antennas may lead to various receiving gains, which are equivalent to diverse channel gains. In this paper, by deeply exploiting such a characteristic, we propose a power domain multiplexing based co-carrier transmission method in a hybrid satellite network. Superposing a weak signal on a strong one, two signals are enabled to be transmitted on the same carrier with the bandwidth of the strong signal. To guarantee the signals are decodable at both sides, a user pairing strategy is investigated in detail, and the performance gain of the new method is further analyzed. Simulation results show that a carrier resource can be saved in the proposed method with the sacrifice of a marginal bit-error-rate performance. INDEX TERMS Bit-error-rate, co-carrier transmission, hybrid satellite networks, power domain multiplexing.

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