线性调频信号的模糊函数图具有斜刀刃形状,改变信号时宽和带宽可以改变坐标

The fuzzy function graph of the chirp signal has a slanted blade shape. When the signal width and bandwidth are changed, the width of the fuzzy function near the coordinate origin along the two coordinate axes can be changed, so as to achieve better distance resolution and speed resolution. Observing the fuzzy function of the chirp signal can be seen that its shape is similar to that of the rectangular pulse fuzzy function. At the same time, the fuzzy function graph of the chirp signal obtains the maximum value at the coordinate origin, and the value of the fuzzy function drops rapidly when it spreads to the surroundings. From the shape of the fuzzy function, the fuzzy function of the chirp signal is still very ideal, because there will be no blurring of the target. <br>The distance ambiguity function and velocity ambiguity function of chirp signal are compared with the distance ambiguity function and velocity ambiguity function of rectangular pulse. Its advantages are: <br>when the Doppler speed is known, it can have a high accuracy of distance measurement. When the distance is known, it can have a high accuracy of speed measurement

The fuzzy function graph of the linear FM signal has a oblique blade shape, and when changing the signal, width and bandwidth can change the width of the fuzzy function near the coordinate origin along the two axes, so as to achieve a better distance resolution and speed resolution. Looking at the fuzzy function of the linear FM signal, we can see that its shape is similar to the rectangular pulse blur function, while the fuzzy function graph of the linear FM signal obtains the maximum value of the fuzzy function at the coordinate origin, and the value of the fuzzy function drops rapidly when it spreads around. It is ideal to see the fuzzy function of linear FM signal from the shape of the fuzzy function because there is no fuzzy phenomenon of the target.<br>The distance blur function and the speed blur function of the linear FM signal contrast the rectangular pulse and the speed blur function. The advantages are:<br>When Doppler speed is known, it can have a high range-measuring accuracy when the distance is known, can have a high speed measurement accuracy

The ambiguity function diagram of LFM signal has the shape of oblique blade. Changing the signal time width and bandwidth can change the width of ambiguity function along two coordinate axes near the coordinate origin, so as to achieve better range resolution and velocity resolution. By observing the ambiguity function of LFM signal, we can see that its shape is similar to that of rectangular pulse ambiguity function. At the same time, the ambiguity function of LFM signal reaches the maximum value at the coordinate origin, and the value of ambiguity function decreases rapidly when it spreads around. From the shape of the ambiguity function, the ambiguity function of LFM signal is still very ideal, because there will be no ambiguity of the target.<br>The range ambiguity function and velocity ambiguity function of LFM signal are compared with the range ambiguity function and velocity ambiguity function of rectangular pulse. Its advantages are as follows:<br>When the Doppler velocity is known, it can have high ranging accuracy, and when the range is known, it can have high velocity accuracy<br>