For the problem of image enhancement, an improved nonlinear extrapolation method in frequencyspace is proposed.
针对图像增强的问题，提出了一种改进的频域非线性外推方法。
2
Theoretic analysis showed that the minimum jamming power could enter ST-FSK demodulator if frequencyspace were optimal.
理论分析证明，当频率间隔满足一定条件时注入ST-FSK解调器的干扰功率达到最小。
3
The traditional neural network correction has a good adaptivity to the noise. But with a stronger low frequencyspace noise, the correction effect is very poor.