Performance analysis of relay selection strategy with selective decode-and-forward protocol based on threshold decision
Cooperative transmission can effectively overcome performance degradation caused by channel fading and thus improve diversity effect.In order to improve the spectral efficiency of all-time cooperative,relay selection strategy with selective decode-and-forward protocol based on threshold decision was...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Beijing Xintong Media Co., Ltd
2016-01-01
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| Series: | Dianxin kexue |
| Subjects: | |
| Online Access: | http://www.telecomsci.com/zh/article/doi/10.11959/j.issn.1000-0801.2016003/ |
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| Summary: | Cooperative transmission can effectively overcome performance degradation caused by channel fading and thus improve diversity effect.In order to improve the spectral efficiency of all-time cooperative,relay selection strategy with selective decode-and-forward protocol based on threshold decision was mainly investigated.The performance was also analysed and the approximate expression of the outage probability and the spectrum efficiency with high signal-to-noise（SNR）were derived.Simulation results show that under low-SNR and few relays circulations,the outage probability under different thresholds are very close.If the collaboration threshold increases by 0.09,the spectral efficiency improves by 0.12.Under high-SNR and many relays circulations,the spectral efficiency under different thresholds are similar.When the system outage probability is 10<sup>-2</sup>,the collaboration threshold decreases by 0.9 and 1.1 dB SNR gain can be obtained. |
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| ISSN: | 1000-0801 |