中文摘要：

提出了一种新型宽带星载数字信道化器，该数字信道化器以频域滤波技术为基础，完整实现了包括卫星上行宽带信号中各个业务子信号分离、业务子信号交换、交换后业务子信号综合等星上处理过程，最后形成卫星下行宽带信号，既适用于各个业务子信号带宽相同场景，又适用于各个业务子信号带宽不同场景。而且数值实验表明：与现有方法相比，该新型数字信道化器具有更好的性能和灵活性，而且大大降低了计算复杂度。

英文摘要：

The novel digital channelizer based on the theory of frequency domain filter is proposed, the independent communication signals can be extracted from the satellite uplink wideband signal, and have been switching, synthesizing, and finally forming a satellite downlink wideband signal, the proposed novel digital channelizer is fit for not only scene of communication signals with equivalent bandwidth, but also scene of communication signals with different bandwidth. Numerical simulation shows that compared with the existing method, the new digital channelizer has better performance and flexibility, but also greatly reduces the computational complexity.