改进的低复杂度数字信道化器

提出了新型宽带星载数字信道化器,该数字信道化器以频域滤波和复指数调制滤波器组技术为基础,完整地实现了卫星上行宽带信号中各个业务信号分离、业务信号交换、交换后业务信号综合等星上处理过程,最后形成卫星下行宽带信号,既适用于各个业务信号带宽相同场景,又适用于各个业务信号带宽不同场景。数值实验表明,该新型信道化器具有较强的灵活性和可扩展性,同时对数据存储量和信噪比等性能有较大的提高,大大降低了计算复杂度。

Improved digital channelizer of low complexity

The digital channelizer based on the frequency domain filter and complex-exponential modulated filter bank is proposed where the independent communication signals can be extracted from the satellite uplink wideband signal, and be switched and synthesized. Finally, the signals are formed into a satellite downlink wideband signal. The proposed novel digital channelizer can be applied to scene of communication signals with equivalent bandwidth, as well as to the scene of communication signals with different bandwidth. Simulations verify the flexibility and scalability of the proposed channelizer. Furthermore, significant performance improvement and reduction in the memory size have been demonstrated while the computational complexity has been greatly reduced.