Outage Probability Analysis of Cognitive Transmissions: Impact of Spectrum Sensing Overhead
Outage Probability Analysis of Cognitive Transmissions: Impact of Spectrum Sensing Overhead
复制标题
认知传输的中断概率分析：频谱感知开销的影响
DOI：
10.1109/twc.2010.061710.100108
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发表时间：
2010-08
影响因子：
10.4
通讯作者：
Zheng Baoyu
中科院分区：
文献类型：
--
作者：
Zou Yulong;Yao Yu-Dong;Zheng Baoyu
在认知无线电网络中，认知源节点完成认知传输过程需要两个基本阶段：在一定持续时间内进行频谱感知（也称为频谱感知开销）以检测频谱空洞的阶段和通过检测到的频谱空洞进行数据传输的阶段。在本文中，我们专注于中断概率分析的认知传输，考虑这两个阶段联合检查频谱感知开销对系统性能的影响。针对瑞利衰落信道下的认知传输，推导出了一种考虑了未检测到频谱空洞的概率和信道中断概率的整体中断概率的闭式表达式。我们进一步进行了渐近中断分析，在高信噪比区域，并获得最佳的频谱感知开销的解决方案，以尽量减少渐近中断概率。此外，数值结果表明，可以实现最小化的整体中断概率，通过权衡在确定的时间持续时间的频谱空洞检测和数据传输阶段。在本文中，我们还研究了使用认知中继来改善认知传输的中断性能。我们表明，一个显着的改善是由所提出的认知中继方案的整体中断概率。
In cognitive radio networks, a cognitive source node requires two essential phases to complete a cognitive transmission process: the phase of spectrum sensing with a certain time duration (also referred to as spectrum sensing overhead) to detect a spectrum hole and the phase of data transmission through the detected spectrum hole. In this paper, we focus on the outage probability analysis of cognitive transmissions by considering the two phases jointly to examine the impact of spectrum sensing overhead on system performance. A closed-form expression of an overall outage probability that accounts for both the probability of no spectrum hole detected and the probability of a channel outage is derived for cognitive transmissions over Rayleigh fading channels. We further conduct an asymptotic outage analysis in high signal-to-noise ratio regions and obtain an optimal spectrum sensing overhead solution to minimize the asymptotic outage probability. Besides, numerical results show that a minimized overall outage probability can be achieved through a tradeoff in determining the time durations for the spectrum hole detection and data transmission phases. In this paper, we also investigate the use of cognitive relay to improve the outage performance of cognitive transmissions. We show that a significant improvement is achieved by the proposed cognitive relay scheme in terms of the overall outage probability.
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影响因子：
2.5
作者：
T. E. Hunter;S. Sanayei;Aria Nosratinia
通讯作者：
T. E. Hunter;S. Sanayei;Aria Nosratinia
DOI：
10.1109/dyspan.2005.1542627
发表时间：
2005-12
期刊：
First IEEE International Symposium on New Frontiers in Dynamic Spectrum Access Networks, 2005. DySPAN 2005.
影响因子：
--
作者：
A. Ghasemi;E. Sousa
通讯作者：
A. Ghasemi;E. Sousa
DOI：
10.1109/dyspan.2005.1542629
发表时间：
2005-12
期刊：
First IEEE International Symposium on New Frontiers in Dynamic Spectrum Access Networks, 2005. DySPAN 2005.
影响因子：
--
作者：
A. Fehske;J. Gaeddert;Jeffrey H. Reed
通讯作者：
A. Fehske;J. Gaeddert;Jeffrey H. Reed
DOI：
10.1007/978-1-4757-2341-0
发表时间：
1994-04
期刊：
--
影响因子：
--
作者：
H. Poor
通讯作者：
H. Poor
影响因子：
--
作者：
SHANNON, CE
通讯作者：
SHANNON, CE