具有星上数字处理能力的卫星通信系统因受空间辐射环境影响, 容易发生单粒子翻转从而严重影响系统可靠性。传统基于余数校验的快速傅里叶变换 (FFT)方案因存在大量蝶形运算, 需将旋转因子扩大一定倍数以保证计算精确, 导致复杂度大大增加。为解决这个问题, 在 FFT的中间一级将数据进行截断, 并在截断前增加单采样判决模块, 确保正确的数据输出。同时针对上述过程中增加的取模操作提出一种新的简化方案。通过功能仿真和综合证明, 实现了硬件资源占用开销的有效降低。

Due to the influence of the space radiation environment, the satellite communication system with on-board digital processing capability is prone to single-event upset and seriously affects system reliability. The traditional Fast Fourier Transform(FFT) scheme based on the remainder check has a large number of butterfly operations, and the rotation factor needs to be expanded by a certain multiple to ensure accurate calculation, resulting in greatly increased complexity. In order to solve this problem, the data is cut off in the middle stage of the FFT, and a single sampling decision module is added before truncation to ensure correct data output. At the same time, a new simplification is proposed for the modulus operation added in the above process. Through functional simulation and comprehensive proof, the proposed scheme achieves an effective reduction of hardware resource occupation overhead.