diff --git a/生命体征检测/chebyshev_IIR.m b/生命体征检测/chebyshev_IIR.m
new file mode 100644
index 0000000..28b304d
--- /dev/null
+++ b/生命体征检测/chebyshev_IIR.m
@@ -0,0 +1,27 @@
+function Hd = chebyshev_IIR
+%CHEBYSHEV_IIR 返回离散时间滤波器对象。
+
+% MATLAB Code
+% Generated by MATLAB(R) 9.10 and Signal Processing Toolbox 8.6.
+% Generated on: 06-May-2022 09:49:00
+
+% Chebyshev Type I Bandpass filter designed using FDESIGN.BANDPASS.
+
+% All frequency values are in Hz.
+Fs = 20;  % Sampling Frequency
+
+Fstop1 = 0.05;        % First Stopband Frequency
+Fpass1 = 0.1;         % First Passband Frequency
+Fpass2 = 0.5;         % Second Passband Frequency
+Fstop2 = 0.55;        % Second Stopband Frequency
+Astop1 = 30;          % First Stopband Attenuation (dB)
+Apass  = 3;           % Passband Ripple (dB)
+Astop2 = 30;          % Second Stopband Attenuation (dB)
+match  = 'passband';  % Band to match exactly
+
+% Construct an FDESIGN object and call its CHEBY1 method.
+h  = fdesign.bandpass(Fstop1, Fpass1, Fpass2, Fstop2, Astop1, Apass, ...
+                      Astop2, Fs);
+Hd = design(h, 'cheby1', 'MatchExactly', match);
+
+% [EOF]
diff --git a/生命体征检测/chebyshev_IIR2.m b/生命体征检测/chebyshev_IIR2.m
new file mode 100644
index 0000000..73eaf33
--- /dev/null
+++ b/生命体征检测/chebyshev_IIR2.m
@@ -0,0 +1,27 @@
+function Hd = chebyshev_IIR2
+%CHEBYSHEV_IIR 返回离散时间滤波器对象。
+
+% MATLAB Code
+% Generated by MATLAB(R) 9.10 and Signal Processing Toolbox 8.6.
+% Generated on: 06-May-2022 09:49:00
+
+% Chebyshev Type I Bandpass filter designed using FDESIGN.BANDPASS.
+
+% All frequency values are in Hz.
+Fs = 20;  % Sampling Frequency
+
+Fstop1 = 0.7;        % First Stopband Frequency
+Fpass1 = 0.8;         % First Passband Frequency
+Fpass2 = 1.9;         % Second Passband Frequency
+Fstop2 = 2;        % Second Stopband Frequency
+Astop1 = 40;          % First Stopband Attenuation (dB)
+Apass  = 3;           % Passband Ripple (dB)
+Astop2 = 40;          % Second Stopband Attenuation (dB)
+match  = 'passband';  % Band to match exactly
+
+% Construct an FDESIGN object and call its CHEBY1 method.
+h  = fdesign.bandpass(Fstop1, Fpass1, Fpass2, Fstop2, Astop1, Apass, ...
+                      Astop2, Fs);
+Hd = design(h, 'cheby1', 'MatchExactly', match);
+
+% [EOF]