多天线认知无线电网络多信道联合频谱感知策略

发布时间：2018-07-07 16:03

本文选题：认知无线电网络 + 联合频谱感知　；参考：《信号处理》2014年03期

【摘要】：当前,以单天线认知用户组成的认知无线电网络同时协作检测多个信道的分配策略得到了广泛研究,而在认知用户可以灵活选取自身天线进行空间分集接收的条件下,当联合感知多信道时,多天线认知无线电网络如何获取最优的天线分配策略仍有待进一步研究。为解决这一问题,在限制各信道最大虚警概率的前提下,以最小化所有信道漏检概率之和为目标,建立了优化模型,并提出了基于分支定界的算法和基于贪婪思想的启发式算法。前者可以获得最优策略,但复杂度较高,后者以牺牲较小检测性能为代价,明显降低了复杂度,有效实现了检测性能与复杂度的平衡,并且在保护各个信道上主用户免受认知用户干扰层面,一定程度上兼顾了公平性。
[Abstract]:At present, the allocation strategy for cooperative detection of multiple channels in cognitive radio networks composed of single antenna cognitive users has been extensively studied. However, under the condition that cognitive users can flexibly select their own antennas for spatial diversity reception, How to obtain the optimal antenna allocation strategy for multi-antenna cognitive radio networks is still to be further studied. In order to solve this problem, the optimization model is established to minimize the sum of missed detection probability of all channels on the premise of limiting the maximum false alarm probability of each channel. An algorithm based on branch and bound and a heuristic algorithm based on greedy thought are proposed. The former can obtain the optimal strategy, but the complexity is high, the latter reduces the complexity at the expense of smaller detection performance, and realizes the balance between detection performance and complexity effectively. At the same time, the primary user is protected from cognitive user interference in each channel, and fairness is considered to a certain extent.
【作者单位】：解放军信息工程大学;
【基金】：国家科技重大专项基金资助项目(2010ZX03006-002,2011ZX03005-003-03)
【分类号】：TN925

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