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ca_codes.py
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80 lines (72 loc) · 5.02 KB
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import numpy as np
def CAcodes(prn_id):
return np.bitwise_xor(codeG1(), codeG2(prn_id))
def codeG1():
g1 = [1,1,1,1,1,1,1,1,1,1,0,0,0,1,1,1,0,0,0,1,0,0,1,1,1,0,1,1,0,0,1,0,1,
0,1,1,1,0,1,1,1,1,0,1,0,1,0,0,0,1,1,1,1,0,1,0,0,1,0,1,0,1,0,0,0,0,0,
1,0,1,1,1,1,1,1,1,1,0,1,0,1,0,1,0,1,0,1,1,1,1,0,1,0,0,0,0,1,1,1,0,1,
0,0,1,0,0,0,1,1,0,0,1,0,1,1,0,1,0,1,1,0,0,1,1,1,1,0,1,0,1,1,0,0,0,1,
1,0,0,1,1,1,1,1,1,0,0,1,0,1,0,1,0,1,0,0,1,1,0,0,1,1,0,0,1,0,1,0,0,1,
1,1,1,1,0,1,0,0,1,1,1,0,0,0,0,1,0,0,0,1,1,0,1,1,0,0,1,0,0,0,1,0,1,0,
0,1,1,0,1,1,1,1,0,1,1,1,0,1,0,1,0,1,1,1,0,0,1,1,0,0,1,1,1,0,1,1,1,0,
1,1,1,0,0,1,1,1,0,1,0,1,0,0,1,1,1,0,1,0,0,0,0,0,1,1,1,1,0,1,1,0,1,1,
1,0,0,0,0,1,1,0,0,0,1,0,0,1,0,1,0,0,1,0,1,1,0,0,1,1,0,1,0,0,0,1,0,0,
0,1,0,1,1,0,1,0,0,1,0,1,1,1,0,1,0,0,1,1,0,0,0,1,0,1,1,0,0,0,0,0,0,1,
0,1,0,0,1,0,0,1,0,1,1,1,1,1,0,1,1,1,1,0,0,0,1,1,0,0,0,1,1,0,1,1,1,0,
1,1,0,0,0,0,1,1,1,1,0,0,1,0,0,1,1,1,0,0,1,0,1,1,0,0,0,1,0,0,0,0,1,1,
0,1,1,1,1,1,1,1,0,0,1,1,1,0,0,0,1,1,0,1,0,1,0,0,1,0,1,0,0,0,0,1,0,0,
0,0,1,0,0,1,0,1,1,0,1,1,1,1,1,0,1,0,1,1,1,0,0,0,1,0,1,1,1,0,0,1,0,0,
0,0,1,1,1,1,1,0,1,1,0,1,0,1,0,1,0,0,0,1,0,1,1,1,1,0,1,1,0,0,1,1,1,0,
0,1,1,1,1,1,0,0,0,0,0,1,1,1,0,0,1,0,0,1,0,1,0,1,1,0,0,1,0,1,1,1,1,0,
0,1,0,1,1,1,0,0,0,0,0,1,0,1,0,1,1,0,1,1,0,0,1,1,0,0,0,0,1,1,0,1,0,1,
1,0,1,1,1,0,1,0,0,0,1,0,1,0,1,1,1,1,1,1,0,1,0,0,0,1,1,1,0,0,1,1,0,1,
1,1,0,0,1,0,1,0,0,0,1,1,0,1,0,0,0,0,0,0,1,1,0,0,1,0,0,1,0,0,0,1,0,0,
0,0,0,1,0,0,1,1,0,1,1,0,1,0,0,1,1,1,1,0,0,1,1,0,1,0,1,0,1,1,0,0,0,0,
1,0,1,1,1,0,1,1,0,1,0,0,0,1,1,0,0,0,0,1,0,0,1,1,1,1,1,1,1,0,1,1,1,0,
0,0,1,1,1,1,0,0,0,0,0,0,1,1,1,0,1,1,0,1,1,0,0,0,1,0,1,0,0,0,1,0,0,1,
1,0,0,1,0,0,0,0,0,1,1,0,1,0,0,1,0,0,1,1,1,1,0,1,1,1,1,1,0,0,0,1,0,1,
0,1,0,1,1,0,1,0,0,0,0,1,0,1,0,0,0,0,0,0,0,1,0,1,1,0,1,1,0,1,1,1,1,0,
0,1,1,1,1,0,0,0,1,0,0,0,1,1,1,1,1,1,0,1,1,0,0,0,1,1,1,0,1,0,1,1,0,1,
0,1,0,0,0,0,1,1,0,0,1,1,0,1,1,0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,1,1,0,1,
1,0,1,1,0,1,0,1,1,1,0,1,0,1,1,1,1,0,0,0,0,1,0,1,0,1,0,0,1,0,0,0,0,1,
0,1,1,0,0,1,0,0,1,1,0,0,0,0,0,1,0,0,0,1,0,0,1,0,0,0,0,0,0,1,0,0,0,0,
0,0,0,0,0,1,0,0,1,0,0,1,0,0,1,1,0,1,0,0,1,1,0,1,0,1,1,1,1,1,0,0,1,1,
0,0,0,1,1,1,1,1,0,0,1,0,0,0,1,1,1,0,1,1,1,1,1,1,0,0,0,0,1,1,1,0,0,0,
0,0,0,0]
return np.array(g1)
def codeG2(prn_id):
g2 = [1,1,1,1,1,1,1,1,1,1,0,0,1,0,1,1,0,1,0,0,1,0,1,0,1,1,1,1,0,1,0,1,0,
0,0,0,0,1,1,1,1,1,0,1,0,1,0,1,0,1,1,0,1,0,0,0,0,0,1,0,1,0,0,1,1,1,0,
1,1,1,0,0,1,0,0,0,0,1,1,0,1,0,0,0,1,1,0,0,1,1,1,1,1,0,1,1,1,1,0,1,1,
0,1,0,0,1,1,1,1,0,0,1,0,1,0,0,0,1,1,1,1,0,1,1,0,0,0,1,0,0,1,0,1,1,1,
1,0,1,1,1,1,1,1,0,1,0,0,1,0,0,1,0,1,1,0,1,1,0,0,1,0,0,0,0,0,1,1,0,1,
0,1,0,0,0,1,0,0,0,0,1,0,1,0,0,0,1,0,1,0,1,0,1,1,1,1,1,1,1,0,1,0,1,1,
1,1,0,0,0,0,1,1,0,1,1,0,1,0,0,0,1,0,0,1,0,0,1,0,0,1,1,0,0,0,1,0,1,0,
1,1,1,0,0,0,1,0,0,1,1,1,0,0,0,0,0,0,0,1,0,0,1,0,1,0,1,0,1,0,1,0,0,0,
1,1,0,1,1,0,0,0,1,1,0,0,1,0,1,0,0,1,1,0,0,0,0,0,0,1,0,1,0,1,1,0,0,1,
1,0,0,1,0,0,1,1,1,1,1,1,0,0,1,1,1,0,1,0,0,1,0,1,1,1,0,0,0,0,0,1,0,0,
1,1,1,1,0,1,1,1,0,1,0,1,0,0,1,0,1,0,0,1,0,0,1,1,1,0,1,0,1,1,1,0,0,1,
1,1,1,0,1,0,1,1,0,1,1,1,1,0,0,0,1,1,0,1,0,1,1,0,1,0,1,0,1,1,0,0,0,1,
1,1,0,0,1,0,0,1,0,0,0,1,1,1,1,1,1,0,1,1,0,0,1,1,1,1,0,0,0,0,0,1,1,0,
0,0,0,1,1,0,0,1,1,0,1,0,1,0,1,0,0,1,1,0,1,0,1,1,1,1,1,0,1,1,0,1,1,0,
0,0,0,1,1,1,0,0,0,1,1,1,0,1,1,1,1,0,0,1,1,0,1,0,0,0,0,1,1,1,0,1,0,0,
0,0,0,0,0,0,1,1,1,0,0,1,1,0,0,1,1,0,0,0,0,1,0,0,1,0,0,0,0,1,0,0,0,1,
1,0,0,0,1,0,0,0,0,0,0,0,1,1,0,0,1,0,0,0,1,0,0,0,1,1,1,0,1,0,1,0,1,1,
1,0,1,0,0,1,1,1,0,0,1,0,1,1,1,1,1,1,0,0,0,1,0,1,0,0,1,0,1,1,0,0,1,1,
1,0,0,1,1,1,0,0,0,1,0,1,1,0,0,1,0,1,1,1,0,1,0,1,1,0,0,1,0,0,1,0,1,0,
0,0,0,1,0,0,1,1,0,1,1,0,0,1,1,0,1,1,1,1,0,1,0,0,0,1,1,1,0,0,0,0,1,0,
1,0,1,0,0,1,0,0,0,1,0,1,0,0,0,0,0,0,1,0,0,0,0,0,1,0,0,0,1,0,0,1,1,0,
0,1,1,1,0,1,1,0,0,1,0,1,0,1,1,0,1,1,0,1,1,1,1,1,0,1,0,0,0,0,1,0,1,1,
0,1,0,1,1,1,0,1,1,0,0,0,0,0,1,0,1,1,0,0,0,0,0,0,0,0,0,1,0,1,1,1,0,1,
1,1,0,1,1,1,1,1,0,0,0,1,1,1,1,1,0,0,0,0,1,0,0,0,0,1,1,1,1,1,1,1,1,0,
1,1,1,0,0,0,0,1,1,1,1,0,1,0,0,1,1,0,0,1,0,1,1,0,0,0,1,0,1,1,1,0,0,1,
0,1,0,1,0,0,0,0,1,1,0,0,0,1,1,0,1,1,1,0,1,0,0,0,1,0,1,1,1,1,0,0,1,0,
0,0,1,1,0,1,0,0,1,1,0,1,1,1,0,0,0,1,1,0,0,0,0,0,1,1,1,0,1,1,0,1,1,1,
0,1,1,0,1,0,1,1,0,0,0,0,1,0,1,1,1,1,1,0,0,1,1,0,0,0,1,1,1,1,0,0,1,1,
1,1,1,1,1,0,0,0,0,0,0,1,1,1,1,0,0,0,1,0,0,0,1,0,1,1,0,1,1,1,0,0,1,1,
0,1,1,0,1,1,0,1,0,1,0,0,1,1,1,1,1,0,0,1,0,0,1,1,0,1,0,0,1,0,0,0,0,0,
0,1,1,0]
delays = [5, 6, 7, 8, 17, 18, 139, 140, 141, 251, 252, 254, 255, 256,
257, 258, 469, 470, 471, 472,473, 474, 509, 512, 513, 514,
515, 516, 859, 860, 861, 862]
return np.roll(g2, delays[prn_id - 1])