20 lines
615 B
Matlab
20 lines
615 B
Matlab
function [range, range_idx] = get_range(s_T, s_R)
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global T_r delta_t len c r_0 range_t num_pulse;
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% 只取第一个 T_r 的数据计算
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range_N = T_r / delta_t;
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s_T_first = [s_T(1:range_N), zeros(1, len - range_N)];
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s_R_first = [s_R(1:range_N), zeros(1, len - range_N)];
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s_T_fft = fft(s_T_first, len);
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s_R_fft = fft(s_R_first, len);
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% 发射信号和回波信号做相关
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p = ifft(s_R_fft .* conj(s_T_fft));
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norm_p = real(p).^2 + imag(p).^2;
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[~, range_idx] = max(norm_p);
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range = range_t(range_idx) * c / 2;
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fprintf("range = %f, r_0 = %f\n", range, r_0);
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end
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