Optimized Multi-Spectrum Access Strategy under Sensing Uncertainty for Cognitive Satellite Communication Network

XIAO Nan; WANG Wei; LIANG Jun; LIU Yulei; ZHANG Zhenhao

doi:10.11999/JEIT170613

Volume 40 Issue 4

Apr. 2018

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Article Navigation > Journal of Electronics & Information Technology > 2018 > 40(4): 818-824

XIAO Nan, WANG Wei, LIANG Jun, LIU Yulei, ZHANG Zhenhao. Optimized Multi-Spectrum Access Strategy under Sensing Uncertainty for Cognitive Satellite Communication Network[J]. Journal of Electronics & Information Technology, 2018, 40(4): 818-824. doi: 10.11999/JEIT170613

Citation:

XIAO Nan, WANG Wei, LIANG Jun, LIU Yulei, ZHANG Zhenhao. Optimized Multi-Spectrum Access Strategy under Sensing Uncertainty for Cognitive Satellite Communication Network[J]. Journal of Electronics & Information Technology, 2018, 40(4): 818-824. doi: 10.11999/JEIT170613

Citation:

XIAO Nan, WANG Wei, LIANG Jun, LIU Yulei, ZHANG Zhenhao. Optimized Multi-Spectrum Access Strategy under Sensing Uncertainty for Cognitive Satellite Communication Network[J]. Journal of Electronics & Information Technology, 2018, 40(4): 818-824. doi: 10.11999/JEIT170613

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Optimized Multi-Spectrum Access Strategy under Sensing Uncertainty for Cognitive Satellite Communication Network

doi: 10.11999/JEIT170613

Funds:

The National Natural Science Foundation of China (61501496), The Natural Science Foundation of Shaanxi Province (2017JM6093)

Received Date: 2017-06-27
Rev Recd Date: 2017-12-07
Publish Date: 2018-04-19

Abstract

Abstract

In allusion to the low efficiency of traditional spectrum access strategies caused by high spectrum sensing uncertainty of satellite cognitive communication network, a novel optimized channel access strategy based on dynamic multi-spectrum sensing is proposed. The cognitive LEO satellite could adjust the probability of channel access in time with different spectrum sensing results according to the relationship between spectrum detection probability and maximum interference threshold of primary user. In order to achieve the maximize throughput of cognitive system, a strategy for decision threshold selection based on joint optimization between spectrum detection probability and false alarm probability is designed, and the optimized number of sensing spectrums is derived. Simulation results indicate that cognitive LEO satellite is able to select optimized spectrum sensing strategy dynamically according to the idle states of primary channels with the interference limitation of primary user, and access primary channels more positively especially when the signal-to-noise ratio of detecting signals is low. The influence of spectrum sensing uncertainty on the efficiency of channel access is depressed and the throughput of cognitive system is improved by the proposed channel access strategy.
- Cognitive satellite communication,
- Sensing uncertainty,
- Spectrum access,
- Threshold optimization,
- Throughput

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References(16)

References

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