基于MATLAB的雷达波型设计仿真程序

function cw_waveform = generate_cw_waveform(frequency, duration, fs)
    % 参数
    t = 0:1/fs:duration; % 时间向量
    cw_waveform = exp(1j * 2 * pi * frequency * t); % 连续波信号
end

function pulse_waveform = generate_pulse_waveform(carrier_frequency, pulse_width, prf, duration, fs)
    % 参数
    t = 0:1/fs:duration; % 时间向量
    pulse_waveform = zeros(size(t)); % 初始化脉冲波形
    pulse_interval = 1 / prf; % 脉冲重复间隔
    pulse_samples = round(pulse_width * fs); % 脉冲宽度对应的采样点数
    interval_samples = round(pulse_interval * fs); % 脉冲间隔对应的采样点数
    
    % 生成脉冲波形
    for i = 1:interval_samples:length(t)
        pulse_waveform(i:i+pulse_samples-1) = exp(1j * 2 * pi * carrier_frequency * t(i:i+pulse_samples-1));
    end
end

function lfm_waveform = generate_lfm_waveform(carrier_frequency, bandwidth, pulse_width, fs)
    % 参数
    t = -pulse_width/2:1/fs:pulse_width/2; % 时间向量
    mu = bandwidth / pulse_width; % 调频斜率
    lfm_waveform = exp(1j * 2 * pi * (carrier_frequency * t + 0.5 * mu * t.^2)); % 线性调频信号
end

function step_freq_waveform = generate_step_freq_waveform(carrier_frequency, step_frequency, num_steps, pulse_width, fs)
    % 参数
    t = 0:1/fs:pulse_width; % 时间向量
    step_freq_waveform = zeros(1, length(t) * num_steps); % 初始化步进频波形
    
    % 生成步进频波形
    for i = 1:num_steps
        freq = carrier_frequency + (i-1) * step_frequency; % 当前频率
        step_freq_waveform((i-1)*length(t)+1:i*length(t)) = exp(1j * 2 * pi * freq * t);
    end
end

% 主程序
clc;
clear;
​
% 参数设置
fs = 1e6; % 采样频率
carrier_frequency = 10e6; % 载波频率
pulse_width = 1e-6; % 脉冲宽度
prf = 1e3; % 脉冲重复频率
bandwidth = 1e6; % LFM带宽
step_frequency = 1e5; % 步进频频率
num_steps = 10; % 步进频步数
duration = 1e-3; % 仿真时间
​
% 生成波形
cw_waveform = generate_cw_waveform(carrier_frequency, duration, fs);
pulse_waveform = generate_pulse_waveform(carrier_frequency, pulse_width, prf, duration, fs);
lfm_waveform = generate_lfm_waveform(carrier_frequency, bandwidth, pulse_width, fs);
step_freq_waveform = generate_step_freq_waveform(carrier_frequency, step_frequency, num_steps, pulse_width, fs);
​
% 绘制波形
figure;
subplot(4, 1, 1);
plot(abs(cw_waveform));
title('连续波（CW）波形');
xlabel('样本');
ylabel('幅度');
​
subplot(4, 1, 2);
plot(abs(pulse_waveform));
title('脉冲波形');
xlabel('样本');
ylabel('幅度');
​
subplot(4, 1, 3);
plot(abs(lfm_waveform));
title('线性调频（LFM）波形');
xlabel('样本');
ylabel('幅度');
​
subplot(4, 1, 4);
plot(abs(step_freq_waveform));
title('步进频波形');
xlabel('样本');
ylabel('幅度');