diff --git a/schainpy/model/cfunctions.pyx b/schainpy/model/cfunctions.pyx
index 9f6f79f..87d9b88 100644
--- a/schainpy/model/cfunctions.pyx
+++ b/schainpy/model/cfunctions.pyx
@@ -1,7 +1,7 @@
 import numpy
 cimport numpy
  
-def decoder(numpy.ndarray[numpy.float32, ndim=2] fft_code, numpy.ndarray[numpy.complex, ndim=2] data):
+def decoder(numpy.ndarray[numpy.float32_t, ndim=2] fft_code, numpy.ndarray[numpy.complex_t, ndim=2] data):
 
     fft_data = numpy.fft.fft(data, axis=1)
     conv = fft_data*fft_code
diff --git a/schainpy/model/jroprocessing.py b/schainpy/model/jroprocessing.py
index df250e2..77614ae 100644
--- a/schainpy/model/jroprocessing.py
+++ b/schainpy/model/jroprocessing.py
@@ -596,7 +596,7 @@ class Decoder(Operation):
         
         self.__nChannels, self.__nHeis = shape
         
-        self.__codeBuffer = numpy.zeros((self.nCode, self.__nHeis), dtype=numpy.float)
+        self.__codeBuffer = numpy.zeros((self.nCode, self.__nHeis), dtype=numpy.float32)
         
         self.__codeBuffer[:,0:self.nBaud] = self.code
         
@@ -686,7 +686,10 @@ class Decoder(Operation):
         if mode == 1:
             print "This function is not implemented"
 #            ndatadec, datadec = self.convolutionInTime(dataOut.data)
-                
+        
+        if mode == 3:
+            ndatadec, datadec = self.convolutionInFreqOpt(dataOut.data)
+              
         dataOut.data = datadec
         
         dataOut.heightList = dataOut.heightList[0:ndatadec]