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时频分布旨在构造一种时间、频率的联合密度函数,以揭示信号所含的频率分量及其随时间的演化特性.构建一种新的时频核函数,推导其离散算法和参数的确定方法,和十几种主要的非线性时频分布对比仿真表明,该分布具有优秀的时域聚集性、频域聚集性和强的交叉项抑制能力.
The time-frequency distribution aims to construct a joint density function of time and frequency to reveal the frequency components contained in the signal and its evolution characteristics over time. A new time-frequency kernel function is constructed and its discrete algorithm and parameters are derived The simulation results show that this distribution has excellent time-domain aggregation, frequency-domain aggregation and strong cross-term suppression.