信号能量对雷达极为重要，是雷达性能的基本保证。增加信号能量实际上会增加

Signal energy is extremely important to radar and is a basic guarantee for radar performance. Increasing the signal energy actually increases the signal-to-noise ratio and the signal-to-noise ratio, thereby improving the detection range, speed measurement accuracy, speed and range resolution of the radar. <br>Under the interference of white noise, the matched filter is the optimal linear processing filter, and its output signal-to-noise ratio can obtain the maximum value. Its value depends on the ratio of the signal energy output to the noise power density of the input signal, that is, it is related to E_s/N_o and has nothing to do with the signal waveform. For colored noise interference, ie noise interference with uneven power spectral density, the best linear filter is no longer a matched filter. Its output signal-to-noise ratio is not only related to the signal energy, but also to the shape of the signal amplitude spectrum. If the power spectral density of the colored noise is N(f), the appropriate signal amplitude spectrum U(f) can be designed to obtain the maximum signal-to-noise ratio. Compared with the matched output maximum signal-to-noise ratio, the maximum signal-to-noise ratio has a certain loss. Therefore, in order to improve the detection capability of the radar, not only the signal energy needs to be increased, but also the overlap of the colored noise on the signal and the spectrum should be minimized. Due to the limited peak power of the transmitting and antenna feeding equipment, proper signal design is required to reduce the pulse energy requirements of the transmitter. In order to make full use of the average power of the transmitter, it is expected that the signal has a rectangular envelope and a longer duration to increase the signal energy. <br>The measurement accuracy and resolution of the target speed depend on the characteristics of the time-domain structure of the signal. The measurement accuracy and resolution of the target distance depends on the characteristics of the frequency domain structure of the signal. If high precision and good range resolution are required, the signal must have a large bandwidth in the frequency domain. If high precision and good speed resolution are required, the signal must have a large time width in the time domain. Although measurement accuracy and resolution are two different radar performances, they have exactly the same characteristics. In addition, from the perspective of improving the accuracy of speed measurement and ranging, not only the equivalent time width and equivalent bandwidth of the signal are required to be large enough, but also the coupling error when jointly estimating the distance speed needs to be eliminated. When the signal ambiguity function is symmetrical about the t-axis and f-axis

Signal energy is very important to radar and is the basic guarantee of radar performance. Increasing signal energy actually increases the signal-to-noise ratio and signal-to-noise ratio, which increases the radar's detection range, speed measurement accuracy, speed, and range resolution.<br>Under the interference of white noise, the matching filter is the optimal linear processing filter, and its output signal-to-noise ratio can obtain the maximum value. Its value depends on the ratio of the signal energy output to the input signal noise power density, i.e. related to E_s/N_o, independent of the signal's waveform. For noise interference, i.e. noise interference with uneven power spectral density, the best linear filter is no longer a matching filter. Its output signal-to-noise ratio is related not only to signal energy, but also to the shape of the signal amplitude spectrum. If the power spectral density of colored noise is N(f), the appropriate signal amplitude U(f) can be designed to obtain the maximum signal-to-noise ratio. The maximum signal-to-noise ratio has a certain loss compared to the matching output maximum signal-to-noise ratio. Therefore, in order to improve the radar detection capability, not only need to increase the signal energy, but also should minimize the overlap of colored noise on the signal and spectrum. Due to the limited peak power of the transmitter and antenna feed equipment, proper signal design is required to reduce the pulse energy requirements of the transmitter. To take full advantage of the average power of the transmitter, the expected signal has a rectangular envelope and a longer duration to increase the signal energy.<br>The accuracy and resolution of the target speed depend on the characteristics of the time domain structure of the signal. The accuracy and resolution of the target distance depend on the characteristics of the frequency domain structure of the signal. If high accuracy and good range resolution are required, the signal must have a large bandwidth in the frequency domain. If high accuracy and good speed resolution are required, the signal must have a large time width in the time domain. Although measurement accuracy and resolution are two different radar performances, they have exactly the same characteristics. In addition, from the point of view of improving speed measurement and range measurement accuracy, not only does it require the equivalent time width and equivalent bandwidth of the signal to be large enough, but also the coupling error when jointly estimating the distance speed needs to be eliminated. When the signal blur function is symmetrical about the t-axis and the f-axis,

Signal energy is very important to radar and is the basic guarantee of radar performance. Increasing the signal energy will actually increase the signal-to-noise ratio and signal-to-noise ratio, so as to improve the radar detection range, speed measurement accuracy, speed and range resolution.<br>Under the interference of white noise, the matched filter is the optimal linear processing filter, and its output signal-to-noise ratio can get the maximum value. Its value depends on the ratio of signal energy output to input signal noise power density, i.e. to E_ s/N_ O correlation, independent of the waveform of the signal. For colored noise, that is, noise with uneven power spectral density, the optimal linear filter is no longer a matched filter. Its output signal-to-noise ratio is not only related to the signal energy, but also to the shape of the signal amplitude spectrum. If the power spectral density of colored noise is n (f), then the appropriate signal amplitude spectrum U (f) can be designed to obtain the maximum signal-to-noise ratio. Compared with the matched output maximum signal-to-noise ratio, the maximum signal-to-noise ratio has a certain loss. Therefore, in order to improve the detection ability of radar, it is necessary not only to increase the signal energy, but also to minimize the overlap between the signal and the colored noise in the spectrum. Due to the limited peak power of transmitting and antenna feeding equipment, appropriate signal design is needed to reduce the pulse energy requirement of the transmitter. In order to make full use of the average power of the transmitter, the desired signal has a rectangular envelope and a longer duration to increase signal energy.<br>The measurement accuracy and resolution of target velocity depend on the time domain structure of the signal. The measurement accuracy and resolution of target range depend on the characteristics of frequency domain structure of signal. If high precision and good range resolution are needed, the signal must have a large bandwidth in the frequency domain. If high precision and good velocity resolution are needed, the signal must have a large time width in the time domain. Although measurement accuracy and resolution are two different radar performances, they have the same characteristics. In addition, from the perspective of improving the accuracy of velocity measurement and ranging, not only the equivalent time width and equivalent bandwidth of the signal are required to be large enough, but also the coupling error in joint estimation of distance and velocity is also needed. When the signal ambiguity function is symmetric about t axis and f axis