updated

Author: GvozdevLeonid

python_hackrf/pyhackrf_tools/pyhackrf_sweep.pyx

@@ -116,7 +116,6 @@ cpdef int sweep_callback(c_pyhackrf.PyHackrfDevice device, cnp.ndarray[cnp.int8_
 
     cdef uint64_t start_frequency = device_data['start_frequency']
 
-    cdef cnp.ndarray fftOut
     cdef cnp.ndarray raw_iq
     cdef cnp.ndarray pwr
 
@@ -162,9 +161,9 @@ cpdef int sweep_callback(c_pyhackrf.PyHackrfDevice device, cnp.ndarray[cnp.int8_
         index += (pyhackrf.PY_BYTES_PER_BLOCK - data_length)
 
         raw_iq = buffer[index:index + data_length:2] / 128 + 1j * buffer[index + 1:index + data_length:2] / 128
-        raw_iq = (raw_iq - raw_iq.mean()) * window 
-        fftOut = fft(raw_iq)
-        pwr = np.log10(np.abs(fftOut * norm_factor) ** 2) * 10.0
+        # raw_iq = (raw_iq - raw_iq.mean()) * window
+        raw_iq = (raw_iq - (raw_iq * window).sum() / window.sum()) * window
+        pwr = np.log10(np.abs(fft(raw_iq) * norm_factor) ** 2) * 10.0
 
         if sweep_style == pyhackrf.py_sweep_style.LINEAR:
             pwr = fftshift(pwr)