AI 中文总结
本文提出一种使用多音正弦调频（MTSFM）波形集的优化方法，用于合成逼近期望形状的宽带MIMO发射波束图，通过设计示例验证了该方法的有效性。
AI 中文摘要
多输入多输出（MIMO）阵列在其每个阵元上发射独特波形，增加了合成新型发射波束图的可用自由度。宽带MIMO波束图的形状由MIMO互谱密度矩阵（CSDM）的结构决定，其元素是该集合中每个波形随频率变化的互谱。本文提出一种使用多音正弦调频（MTSFM）波形集合成宽带MIMO波束图的模型，MTSFM波形的瞬时相位为有限傅里叶级数，修改傅里叶系数以合成恒模且频谱紧凑的波形，使其CSDM能紧密逼近期望的宽带MIMO发射波束图。文中构建了优化程序来合成具有必要CSDM结构的MTSFM波形集，并通过一个说明性设计示例进行了演示。
英文摘要
Multiple-Input Multiple-Output (MIMO) arrays transmit unique waveforms on each of their elements increasing the degrees of freedom available to synthesize novel transmit beampatterns. The wideband MIMO beampattern shape is determined by the structure of the MIMO Cross Spectral Density Matrix (CSDM) whose elements are the cross-spectra between each waveform in the set as a function of frequency. This paper demonstrates a model for synthesizing wideband MIMO beampatterns using Multi-Tone Sinusoidal Frequency Modulated (MTSFM) waveform sets. The MTSFM waveform's instantaneous phase is a finite Fourier series. The Fourier coefficients are modified to synthesize constant modulus and spectrally compact waveforms whose CSDM closely approximates a desired wideband MIMO transmit beampattern. An optimization routine is formulated that synthesizes MTSFM waveform sets that possess the necessary CSDM structure and is demonstrated using an illustrative design example.
CommentsAccepted for publication at 2026 EUSIPCO Conference
