一种非理想感知条件下的双门限机会频谱接入策略

彭晓东; 肖立民; 钟晓峰; 周世东

doi:10.3969/j.issn.1000-0801.2014.08.009

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一种非理想感知条件下的双门限机会频谱接入策略

研究与开发 | 更新时间：2024-06-05

- 一种非理想感知条件下的双门限机会频谱接入策略
- A Dual Threshold Based Opportunistic Spectrum Access Policy with Non-Ideal Spectrum Sensing
- 电信科学 2014年30卷第8期页码：60-65
- 作者机构：
  
  1. 清华大学电子工程系
  2. 清华信息科学与技术国家实验室北京100084
- 作者简介：
  
  [ "彭晓东，男，清华大学博士生，主要研究方向为信号处理、认知无线电、无线信道建模等。" ]
  [ "肖立民，男，清华信息科学与技术国家实验室副教授，主要研究方向为信道测量与建模、无线移动通信和宽带无线传输技术。" ]
  [ "钟晓峰，男，清华大学副研究员，主要研究方向为无线网络技术，包括B3G/4G移动通信系统、分布式无线通信系统、无线自组织与协作传输网络等。" ]
  [ "周世东，男，清华大学教授，主要研究方向为无线与移动通信系统体制与实现、第三代移动通信系统与技术、B3G/4G 移动通信体制与技术、信道编译码技术、多天线系统与技术、MIMO技术、分布式天线系统。" ]
- 基金信息：
  
  国家科技重大专项基金资助项目(2013ZX03001024-004);国家重点基础研究发展计划（“973”计划）基金资助项目;The National Basic Research Program of China （973 Program）(2013CB329002);国家自然科学青年基金资助项目(61201192);国家高技术研究发展计划（“863”计划）基金资助项目(2012AA011402);清华大学自主科研计划基金资助项目;Independent Scientific Research Project of Tsinghua University(2011THZ02-2);国家国际科技合作项目(2012DFG12010);爱立信合作项目(20123000059)
- DOI：10.3969/j.issn.1000-0801.2014.08.009
  中图分类号：
- 网络出版日期：2014-08，
  
  纸质出版日期：2014-08-15
- 稿件说明：
移动端阅览
彭晓东, 肖立民, 钟晓峰, 等. 一种非理想感知条件下的双门限机会频谱接入策略[J]. 电信科学, 2014,30(8):60-65.

Xiaodong Peng, Limin Xiao, Xiaofeng Zhong, et al. A Dual Threshold Based Opportunistic Spectrum Access Policy with Non-Ideal Spectrum Sensing[J]. Telecommunications science, 2014, 30(8): 60-65.
彭晓东, 肖立民, 钟晓峰, 等. 一种非理想感知条件下的双门限机会频谱接入策略[J]. 电信科学, 2014,30(8):60-65. DOI： 10.3969/j.issn.1000-0801.2014.08.009.

Xiaodong Peng, Limin Xiao, Xiaofeng Zhong, et al. A Dual Threshold Based Opportunistic Spectrum Access Policy with Non-Ideal Spectrum Sensing[J]. Telecommunications science, 2014, 30(8): 60-65. DOI： 10.3969/j.issn.1000-0801.2014.08.009.

摘要

为了有效提高认知网络中次用户的吞吐率性能，提出了一种应用于非理想感知条件下的双门限机会频谱接入策略。该策略能在次用户对信道占用情况感知非理想的条件下，综合考虑次用户的信道质量和非准确的信道占用信息，使次用户在信道感知为空闲和占用时分别以不同的信道质量门限选择接入信道，从而最大程度地利用信道质量较好的传输机会，提高次用户的吞吐率性能。结合本策略，建立了以次用户的有效吞吐率最大化为目标、以对主用户的干扰程度为约束条件的优化问题，并在次用户对信道感知存在误差的条件下给出了最优门限的设计方法。仿真结果表明，所提出的双门限机会频谱接入策略能够在非理想感知条件下显著提高次用户的有效吞吐率。

Abstract

To effectively improve the throughput performance of secondary user in cognitive networks

a dual threshold based opportunistic spectrum access policy was proposed

which could be implemented under the condition that secondary user had non-ideal spectrum sensing capability. The proposed policy can take both channel quality information of secondary user and the inaccurate channel occupation information into account

to make secondary user access the channel in sensed idle and busy states with different channel quality thresholds. Based on this

the throughput performance of secondary user can be improved significantly by utilizing the transmission opportunities with good channel quality. With this policy

an optimization problem maximizing the effective throughput of secondary user with interference constraint for protecting primary user was formulated

and the optimal channel quality thresholds were derived under non-ideal spectrum sensing. Simulation results demonstrate the effective throughput performance of secondary user with non-ideal spectrum sensing capability can be improved significantly by implementing the proposed dual threshold based opportunistic spectrum access policy.

关键词

Keywords

references

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