74 lines
2.4 KiB
Matlab
74 lines
2.4 KiB
Matlab
%%************************【频带干扰输出参数函数】****************************%%
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%%=============================参数说明===================================%%
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% J 检测出来的干扰点集合
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% Power_multi 多音干扰功率集合
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% f_multi 频带干扰频率集合
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% Num_multi 多音干扰个数
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% Power_band 频带干扰功率
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% f_wide 频带干扰带宽
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% f_start频带起始频率
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% f_end频带截止频率
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% Num_band 频带干扰个数
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% data 频域数据
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% fs 采样频率
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%%========================================================================%%
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function [Num_multi,f_multi,Power_multi,Num_band,f_start,f_end,f_wide,Power_band] = Band_Multi_Parameter(data,J,fs,NFFT)
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J = sort(J,'ascend')-1;
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len_J = length(J);
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f_start = [];
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f_end = [];
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c1=1;
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mono_d = cell(0,0);
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mono_s = cell(0,0);
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mono = [];
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f_d = [];
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f_s = [];
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power_m = [];
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power_d = [];
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power_s = [];
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band = cell(0,0);
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while c1 < len_J
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c2 = 0;
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while (c1 + c2 + 1 <= len_J && J(c1) + c2 + 1==J(c1 + c2 + 1))
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c2 = c2 + 1;
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end
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if(c2 > 2)
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band = [band;(J(c1:1:c1+c2))]; %%连续点超过3，记为频带干扰
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end
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if c2 == 2
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mono_d = [mono_d;(J(c1:1:c1+c2))]; %%频谱扩散的单音
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end
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if c2 == 1
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mono_s = [mono_s;(J(c1:1:c1+c2))];
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end
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if c2 == 0
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mono = [mono,J(c1)];
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end
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c1 = c1 + c2 +1;
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if c1 == len_J && J(len_J-1) + 1 ~= J(len_J)
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mono = [mono,J(len_J)];
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end
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end
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for k = 1:numel(mono_d)
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f_d(k) = mono_d{k}(2)*fs/NFFT/10^6;
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power_d(k) = sum(abs(data(mono_d{k}+1)).^2)/NFFT^2;
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end
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for m = 1:numel(mono_s)
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f_s(m) = 0.5*(mono_s{m}(1)+mono_s{m}(2))*fs/NFFT/10^6;
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power_s(m) = sum(abs(data(mono_s{m}+1)).^2)/NFFT^2;
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end
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power_m = abs(data(mono+1)).^2/NFFT^2;
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mono = mono*fs/NFFT/10^6;
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power_multi1 = [power_m,power_d,power_s];
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f_multi1 = [mono,f_d,f_s];
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[f_multi,index] = sort(f_multi1,'ascend');
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Power_multi =power_multi1(index);
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Num_multi = length(f_multi1);
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for k = 1 : numel(band)
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f_start(k) = band{k}(1)*fs/NFFT/10^6;
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f_end(k) = band{k}(end)*fs/NFFT/10^6;
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end
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f_wide =sum( abs(f_start - f_end));
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Power_band = 2*sum(abs(data(J+1)).^2)/NFFT^2;
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Num_band = length(f_end);
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end |