|Table of Contents|

[1] Song Xiaoqin, Jin Hui, Tan Yazhu, Hu Jing, et al. A cooperative spectrum sensing results transmission schemewith LT code based on energy efficiency priority [J]. Journal of Southeast University (English Edition), 2018, 34 (4): 444-450. [doi:10.3969/j.issn.1003-7985.2018.04.005]
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A cooperative spectrum sensing results transmission schemewith LT code based on energy efficiency priority()
一种基于能效优先的LT码协作频谱感知结果传输方案

Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:
34
Issue:
2018 4
Page:
444-450
Research Field:
Information and Communication Engineering
Publishing date:
2018-12-20

Info

Title:
A cooperative spectrum sensing results transmission schemewith LT code based on energy efficiency priority
一种基于能效优先的LT码协作频谱感知结果传输方案
Author(s):
Song Xiaoqin1, Jin Hui1 , Tan Yazhu1, Hu Jing2, Song Tiecheng2
1College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China
2 School of Information Science and Engineering, Southeast University, Nanjing 210096, China
宋晓勤1, 金慧1, 谈雅竹1, 胡静2, 宋铁成2
1南京航空航天大学电子信息工程学院, 南京211106; 2东南大学信息科学与工程学院, 南京210096
Keywords:
cooperative spectrum sensing;  energy-efficient;  cluster-based;  Luby transform(LT)code;  degree distribution
协作频谱感知;  能效;  基于分簇;  LT码;  度分布
PACS:
TN914.5
DOI:
10.3969/j.issn.1003-7985.2018.04.005
Abstract:
To deal with a sharp increase in transmission energy consumption due to the presence of a large number of secondary users(SUs), an energy-efficient cooperative spectrum sensing results transmission scheme is proposed for cognitive radio systems. First, a cluster-based structure is introduced into the sensing results transmission scheme to reduce the transmission power. Then, the centralized sensing results transmission model is employed, and the non-fixed code rate Luby transform(LT)code is selected as the channel coding since its code rate can dynamically adapt to channel conditions and therefore avoid unnecessary redundancy in the transmission power. Furthermore, an improved optimal degree distribution(ODD)is designed for the LT code. The simulation results show that the choice of the appropriate parameters in degree distribution is very helpful for the LT code to achieve a promising performance. The ODD with optimized parameters can achieve more than 2 dB performance gain than other typical degree distributions when the bit error rate(BER)is 10-3. The energy consumption of the proposed scheme is not only at least 71.4% lower than that of the non-coding system, but also lower than that of the convolutional coding system with different code rates. Meanwhile, the energy consumption can be further reduced in the case that a suitable clustering method is selected.
针对认知无线电系统中, 因次级用户(SUs)数量较大而造成传输能量急剧增加的问题, 提出一种基于能效优先的协作频谱感知结果传输方案.首先, 将分簇结构引入感知结果传输系统以降低发射功率, 然后, 在中心化的感知信息传输模型中采用无固定码率的LT码, 因为它能动态地适应信道条件, 避免传输过程中不必要的冗余度.此外, LT码采用改进的最优度分布(ODD)设计.仿真结果表明, 在度分布中选取合适的参数有助于LT码获得理想的性能.与其他典型的LT码度分布相比, ODD在选取了优化参数后, 当比特误码率为10-3时, 可以获得超过2 dB的性能增益.所提出方案的能耗不仅比非编码系统节约至少71.4%, 而且低于不同码率的卷积码编码系统.同时, 当选择合适的分簇方法时, 可以进一步降低能耗.

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Memo

Memo:
Biography: Song Xiaoqin(1973—), female, doctor, associate professor, xiaoqin.song@163.com.
Foundation items: The National Natural Science Foundation of China(No.61771126), the Foundation of Graduate Innovation Center in NUAA(No.kfjj20170402).
Citation: Song Xiaoqin, Jin Hui, Tan Yazhu, et al.A cooperative spectrum sensing results transmission scheme with LT code based on energy efficiency priority[J].Journal of Southeast University(English Edition), 2018, 34(4):444-450.DOI:10.3969/j.issn.1003-7985.2018.04.005.
Last Update: 2018-12-20