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西安电子科技大学 雷达信号处理国家重点实验室,陕西 西安 710071
[ "吴凯(1990-),男,安徽淮北人,西安电子科技大学博士生,主要研究方向为宽带阵列信号处理算法、自适应波束形成算法等。" ]
[ "苏涛(1968-),男,陕西西安人,西安电子科技大学教授、博士生导师,主要研究方向为面向雷达、声纳、通信的高速实时信号处理、信号处理快速算法研究、宽带阵列信号处理、MIMO波形设计、ISAR成像等。" ]
[ "李强(1992-),男,山东青岛人,西安电子科技大学硕士生,主要研究方向为宽带相控阵雷达系统。" ]
[ "何学辉(1979-),男,江西吉安人,西安电子科技大学副教授、硕士生导师,主要研究方向为雷达信号处理凸优化理论、目标检测、雷达干扰抑制等。" ]
网络出版日期:2015-09,
纸质出版日期:2015-09-25
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吴凯, 苏涛, 李强, 等. 最大稀疏稳健恒定束宽波束形成器设计[J]. 通信学报, 2015,36(9):160-168.
Kai WU, Tao SU, Qiang LI, et al. Design of robust constant beamwidth beamformer with maximal sparsity[J]. Journal on communications, 2015, 36(9): 160-168.
吴凯, 苏涛, 李强, 等. 最大稀疏稳健恒定束宽波束形成器设计[J]. 通信学报, 2015,36(9):160-168. DOI: 10.11959/j.issn.1000-436x.2015208.
Kai WU, Tao SU, Qiang LI, et al. Design of robust constant beamwidth beamformer with maximal sparsity[J]. Journal on communications, 2015, 36(9): 160-168. DOI: 10.11959/j.issn.1000-436x.2015208.
为了降低宽带阵列恒定束宽的实现复杂性,在分析宽带阵列稀疏性的基础上,构造了以阵元和抽头延迟线(TDL
tapped delay line)稀疏性的凸组合为目标函数,满足恒定束宽约束的波束形成器优化模型,降低了所需的阵元和 TDL 个数。引入重加权机制,通过序列凸优化,使稀疏性递增并收敛到最大值,证明了保证波束形成器稳健性的范数约束与最大TDL稀疏目标函数之间的等价性。仿真结果表明,可用较少的阵元及TDL个数获得相同的恒定束宽性能,具有工程实用价值。
To reduce the complexity of broadband array systems
an optimization model was built based on the analysis of the sparsity of the broadband array.The objective function was the convex combination of sensor and TDL sparsity with the constraint of constant beamwidth.By re-weighting the objective function
the sparsity of the array weights in-creased and converged to the maximal value.The equivalence between the norm constraint on array weights and the spar-sity of TDL was proved.Simulation results demonstrate that to obtain the same performance
the number of sensors and TDL of the proposed beamformer needed is decreased which reduces the system complexity
showing that the beam-former designed has great practical value.
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