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add mapping function with hard mapping to Modem class #7

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add mapping function with hard mapping to Modem class #7

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8 changes: 8 additions & 0 deletions commpy/modulation.py
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Original file line number Diff line number Diff line change
Expand Up @@ -93,6 +93,14 @@ def demodulate(self, input_symbols, demod_type, noise_var = 0):

return demod_bits

def mapping(self, input_symbols, map_type, noise_var = 0):
if map_type == 'hard':
index_list = map(lambda i: self.constellation[argmin(abs(input_symbols[i] - self.constellation))], \
xrange(0, len(input_symbols)))
else:
pass
return index_list


class PSKModem(Modem):
""" Creates a Phase Shift Keying (PSK) Modem object. """
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