突破期望信号功率制约的稳健波束形成技术研究

项目名称： 突破期望信号功率制约的稳健波束形成技术研究

项目编号： No.61301262

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 无线电电子学、电信技术

项目作者： 谢菊兰

作者单位： 电子科技大学

项目金额： 28万元

中文摘要： 自适应波束形成技术可以提高阵列天线的性能。然而波束形成技术从理论到应用转化存在一定的困难。造成这个问题的原因主要是：实际系统中的误差和波束形成算法的高计算量。由此可见，快速有效的稳健波束形成算法才是实际工程应用所需求的。虽然，人们已经致力于研究快速有效的稳健波束形成算法，但是这些算法大都受限于期望信号功率的动态制约。它们要么只适用于期望信号功率低的时候，要么只适用于期望信号功率高的情况。这一现象限制了稳健波束形成算法在某些领域的应用。 本项目将针对上述问题，在对多种已有成熟算法及其原理进行深入分析的基础上，寻找出算法受期望信号功率制约的关键因素，并对算法如何突破期望信号功率制约的科学问题开展研究，使得算法可以适应更广泛的领域需求；在波束器可突破期望信号功率制约的前提下，发展基于降维和易于实时更新的稳健波束形成理论和算法，为算法走向实用化提供理论指导。

中文关键词： 阵列信号；波束形成；空域滤波；稳健性；

英文摘要： It is well known that adaptive beamforming techniques can improve the performance of the array antenna. However, they are facing some difficulties when transforming the theory to the application. This problem is mainly caused by the errors in practical systems and the high computation complexity of beamforming algorithms. Consequently, developing fast and effective robust beamforming algorithms is of significant importance in practical engineering applications.Although there are many fast and robust beamforming algorithms in current literatures, most of them are constrained by the power of the desired signals and they are only suitable for the cases with either too high or too low power, which limits the application of robust beamforming algorithms in some areas. Considering the problem mentioned above, this research is conducted to find out the key factors of the phenomenon that the algorithms are affected by the power constaint, on condition that the current exiting algorithms are well studied.Meanwhile, the problem that how to break through the power constraint of desired signals is considered in this research, aiming at adapting the bobust algorithms to a more extensive area. Finally, by employing reduced dimension techniques and adaptive iterative algorithms, fast beamforming algorithms without the power co

英文关键词： Array Signal；Beamforming；Spatial Filtering；Robust；