diff options
Diffstat (limited to 'gr-fft/python/fft/logpwrfft.py')
| -rw-r--r-- | gr-fft/python/fft/logpwrfft.py | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/gr-fft/python/fft/logpwrfft.py b/gr-fft/python/fft/logpwrfft.py index f3c27342cd..82f852e190 100644 --- a/gr-fft/python/fft/logpwrfft.py +++ b/gr-fft/python/fft/logpwrfft.py @@ -26,7 +26,7 @@ class _logpwrfft_base(gr.hier_block2): Create a log10(abs(fft)) stream chain, with real or complex input. """ - def __init__(self, sample_rate, fft_size, ref_scale, frame_rate, avg_alpha, average, win=None): + def __init__(self, sample_rate, fft_size, ref_scale, frame_rate, avg_alpha, average, win=None, shift=False): """ Create an log10(abs(fft)) stream chain. Provide access to the setting the filter and sample rate. @@ -39,6 +39,7 @@ class _logpwrfft_base(gr.hier_block2): avg_alpha: FFT averaging (over time) constant [0.0-1.0] average: Whether to average [True, False] win: the window taps generation function + shift: shift zero-frequency component to center of spectrum """ gr.hier_block2.__init__(self, self._name, gr.io_signature(1, 1, self._item_size), # Input signature @@ -48,10 +49,9 @@ class _logpwrfft_base(gr.hier_block2): sample_rate=sample_rate, vec_rate=frame_rate, vec_len=fft_size) - if win is None: win = window.blackmanharris fft_window = win(fft_size) - fft = self._fft_block[0](fft_size, True, fft_window) + fft = self._fft_block[0](fft_size, True, fft_window, shift=shift) window_power = sum([x*x for x in fft_window]) c2magsq = blocks.complex_to_mag_squared(fft_size) |