The LFM signal has a high resolution of range and speed, as well as low probability of intercept. LFM信号具有更高的距离、速度分辨率,以及耋簟的低截获概率特性。 lib.cqvip.com 5. The modulation parameter estimation of LFM signal and MPSK signal was studied. 研究了线性调频信号、相位编码信号的调...
;plot(f,abs(LFM_signal_pulse_freq));xlabel('频率 (Hz)');ylabel('幅度');title('LFM 脉冲(含整个Tr) 信号频域波形');% 5.模糊函数N=400;% 点数fd_max=B;% 自己设置,一般设成带宽Btao_delay=linspace(-tao,tao,N);% 时延范围F_D=linspace(-fd_max,fd_max,N);% 多普勒频率范围chi=zeros(l...
%% ==Linear Frequency Modulation (LFM) Signal or Chirp Signal== %% clc; close all; clear all; %% 线性调频基本参数的设置 Fs = 5e6; % 采样频率 T = 10e-5; % 脉冲宽度100微秒 B = 1e6; % 带宽1MHz k = B/T; % 调频斜率 N = round(T*Fs); % 采样点个数 t = linspace(-T/2,...
Abstract:Since the LFM signal occupies a wide band in frequency domain,it's impossible to use singular value decomposition to separate the noisy LFM signal into signal subspace and noise subspace.To counter this drawback,a new subspace decomposition algorithm based on the rotation of time-frequency...
Signal and test definition (STD) standard is the theoretical basis for the application of signal automatic test engineering.However,the primary signal model provided in this standard can not meet the requirements of radar warning equipment test...
(-1).*Qchannal;%complex signal%Compute theFFToftheLFMwaveformLFMFFT=fftshift(fft(LFM));%Plot the real and Immaginary parts and the spectrum freqlimit=0.5/1.e-9;%the sampling interval1nano-second freq=linspace(-freqlimit/1.e6,freqlimit/1.e6,10001);figure(1)plot(delt*1e6,Ichannal,'k...
Keywords:Signalprocessing;Parameterestimation;Sub-sampling;OrthogonalMatchingPursuit(OMP);Linear FrequencyModulated(LFM)signal 1引言 线性调频(LFM)信号是研究最早且应用最为广 泛的脉冲压缩信号,对其进行参数估计在雷达和电 子对抗领域中具有重要的研究和应用价值。多年来 国内外学者们研究了许多LFM信号参数估计的方 ...
(RWT) is proposed.By analyzing the performance of detection, the signal-to-noise ratio of RWT exportation under noise background is received , and the detection probability in Gaussian white noise environment is derived.The results show that this method is efficiency for the LFM signal detection...
Amp = sqrt(signal_pow); %LFM信号 St=Amp* (exp(1j*pi*K*td.^2 + 1j*2*pi* (f0+Dopl).*td).*( td>0 &td<T)); %噪声信号 Sn=normrnd(0,noise_amp, 1, Nwin) + 1j*normrnd(0,noise_amp,1, Nwin); %回波叠加 Stn=St+Sn; ...
The linear frequency modulation (LFM) signal processor may be programmed to be a matched filter for any pulse compression (PC) ratio less than or equal to the square of the number of bandpass filters. The processor is implemented by using a fast Fourier transform (FFT) for the filter bank....