复杂环境下的可调协作检测机理研究

项目名称： 复杂环境下的可调协作检测机理研究

项目编号： No.61201145

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 电子学与信息系统

项目作者： 刘志勇

作者单位： 哈尔滨工业大学

项目金额： 25万元

中文摘要： 协作通信蕴藏着巨大的潜在应用价值，协作检测是其核心支撑技术之一。而复杂环境(噪声具非高斯性且信道为频率选择性信道)会影响协作检测的性能，是必须要考虑的问题。为更大程度提高检测性能，本项目拟对复杂环境下的可调协作检测机理进行系统性的研究。首先针对复杂环境，提出以均衡检测器输出稳态均方误差作为性能指标的中继节点选择机制，实现参与节点数可调；而后进一步考虑信道不同影响，对工作于解码转发(DF)模式的中继节点，提出基于H∞标准的观察窗口长度可调的均衡检测器，以期进一步提高检测性能；在以上研究基础上，在接收节点端，提出基于H∞标准的多分支均衡检测机制，以期有效合并处理来自于多个节点的信号；进一步考虑信道不同，提出各分支观察窗口长度可调的多分支均衡检测机制。本项目充分挖掘协作检测的潜在优势，可建立起复杂环境下的可调协作检测机理体系，为协作检测实现提供一种有价值的参考方案。

中文关键词： 协作通信；中继选择；检测；自适应；优化

英文摘要： Cooperative communication has significant value of application, one of its core support technology is cooperative detection. However, the performance of cooperative detection would be influenced by complex environment (non-Gaussian noise and frequency selective channel), it's the problem that must be considered. In order to improve the detction performance more effectively, the project intends to investigate the mechanism of adjustable cooperative detection systematically. First, for complex enviroment, the mechanism of relay node selection, that use steady mean square error of equalization detector as the performance index, is proposed to realise adjustment of node numbers participated in cooperation detection. Second, to further consider the effects of channel difference, for the relay node in decode-and-forward mode, adjustable observation window length (AOWL) equalization detector based on H∞ criterion is proposed to further improve the detection performance. At last, on the basis of the above investigation, for the receiving node, the mechanism of multi-branch equalization detection based on H∞ criterion is proposed to combine effectively the signals from multiple nodes. And then to to further consider the effects of channel difference, the the mechanism of multi-branch AOWL equalization detection is propo

英文关键词： Cooperative Communication；Relay Selection；Detection；Adaptation；Optimization