mirror of
https://github.com/jhshi/openofdm.git
synced 2024-12-25 00:11:16 +00:00
44 lines
928 B
Python
44 lines
928 B
Python
|
|
# Authors: Veeresh Taranalli <veeresht@gmail.com>
|
|
# License: BSD 3-Clause
|
|
|
|
"""
|
|
============================================
|
|
Impairments (:mod:`commpy.impairments`)
|
|
============================================
|
|
|
|
.. autosummary::
|
|
:toctree: generated/
|
|
|
|
add_frequency_offset -- Add frequency offset impairment.
|
|
|
|
"""
|
|
|
|
from numpy import exp, pi, arange
|
|
|
|
__all__ = ['add_frequency_offset']
|
|
|
|
def add_frequency_offset(waveform, Fs, delta_f):
|
|
"""
|
|
Add frequency offset impairment to input signal.
|
|
|
|
Parameters
|
|
----------
|
|
waveform : 1D ndarray of floats
|
|
Input signal.
|
|
|
|
Fs : float
|
|
Sampling frequency (in Hz).
|
|
|
|
delta_f : float
|
|
Frequency offset (in Hz).
|
|
|
|
Returns
|
|
-------
|
|
output_waveform : 1D ndarray of floats
|
|
Output signal with frequency offset.
|
|
"""
|
|
|
|
output_waveform = waveform*exp(1j*2*pi*(delta_f/Fs)*arange(len(waveform)))
|
|
return output_waveform
|