38 lines
1.2 KiB
Matlab
38 lines
1.2 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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% data 频域数据
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% fs 采样频率
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% NFFT FFT点数
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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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%%========================================================================%%
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function [Num_band,f_start,f_end,f_wide,Power_band] = Band_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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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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c1 = c1 + c2 +1;
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end
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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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Power_band(k) = 2*sum(abs(data(band{k}(1:end)+1)).^2)/NFFT^2;
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end
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f_wide = sum(abs(f_end - f_start));
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Num_band = length(f_end);
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end
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