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中文摘要：
由于MIMO阵列发射方向图通常是由期望方向图优化出信号协方差矩阵来实现,其方法运算量大且算法性能依赖参数选取等。该文提出利用基于二阶锥优化（second-order cone programs）方法的主瓣宽度约束条件下最低旁瓣波束形成构造出一组较低旁瓣的基波束,在集中式MIMO阵列的任意发射方向图可以由一组基波束合成的基础上,应用线性规划方法快速求解出构成发射方向图的基波束的比例系数。该方法设计的方向图具有更低的旁瓣和更加平滑的主瓣指向,仿真结果证实了方法的有效性。
英文摘要：
Transmit beampattern for MIMO array with collocated antennas is usually obtained by optimization of signal correlation matrix.These methods have disadvantages of the performance strongly depending on initialization parameters and computation complexity.This paper presents a set of basic beams created by minimizing sidelobe level beamforming of uniform linear array using second-order cone programs method,based on the idea that an arbitrary beampattern can be synthesized by a set of basic beam.Then the weighted coefficients of basic beam of transmit beampattern can fastly be computed.The presented method possesses more minimized sidelobe and smoother mainlobe.The efficiency and validity are verified by the simulation results.
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