线性调频信号在宽脉冲内附加线性调频以扩展信号频带，提供了时宽带宽积大于1的信号，有效地解决了大的时宽和带宽不可兼得的矛盾。-LFM pulse width within the additional chirp signal bandwidth expansion, Broadband provides a wide plot when more than one signal, effectively solve the big time and wide bandwidth closest