【摘要】 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。更多还原

【Abstract】 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.更多还原