方向增益 meaning in English

directivity gain

Dbf algorithms for 2d planar array based on the algorithms for 1d array are discussed in this paper . the author ' s main contributions include research of the adaptive digital beamforming algorithm , which control both amplitude and phase of each array element : diagonal loading qrd - smi algorithm . research of two phase - only dbf algorithms : small phase perturbation restriction algorithm and maximum gain of the expected direction restriction algorithm
面阵的数字波束形成算法是面阵dbf技术的关键，本文在现有的一维数字波束形成算法基础上，研究了二维面阵的数字波束形成算法，主要工作有：面阵的幅度相位全控制自适应数字波束形成算法? ?对角加载qrd - smi算法的研究；两种面阵唯相位( phase - only )数字波束形成算法? ?小相位扰动约束算法和期望方向增益最大约束算法的研究；面阵的数字多波束形成算法? ?二维fft多波束的研究，以及fft在可编程逻辑器件中的实现。