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32 lines
762 B
Python
32 lines
762 B
Python
"""
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Library for this simulation
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"""
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import numpy as np
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from earsim import Antenna
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def sine_beacon(f, t, t0=0, amplitude=1, baseline=0):
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return amplitude * np.sin(2*np.pi*f*(t-t0)) + baseline
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def distance(x1, x2):
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"""
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Calculate the Euclidean distance between two locations x1 and x2
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"""
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assert type(x1) in [Antenna]
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x1 = np.array([x1.x, x1.y, x1.z])
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assert type(x2) in [Antenna]
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x2 = np.array([x2.x, x2.y, x2.z])
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return np.sqrt( np.sum( (x1-x2)**2 ) )
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def beacon_from(tx, rx, f, t=0, t0=0, c_light=3e8, radiate_rsq=True, amplitude=1,**kwargs):
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dist = distance(tx,rx)
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t0 = t0 + dist/c_light
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if radiate_rsq:
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amplitude *= 1/(dist**2)
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return sine_beacon(f, t, t0=t0, amplitude=amplitude,**kwargs)
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