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And finally the Cell mask is decoded as the following 28-bit sequence (BITSET): 1111111011101001111010011111. After that, the satellite and signal data that follow should be
identified correctly. To do this, the following steps should be taken:
1.
With 7 satellites received for up to 4 different types of signals, the Cell mask should be split into seven equal parts (Sub-BITSET):
1111111011101001111010011111
1
2
3
First:
1111
Second:
1110
Third:
1110
Fourth:
1001
Fifth:
1110
Sixth:
1001
Seventh:
1111
4
5
6
7
One can see that the length of each Sub-BITSET is equal to the number of the different tracked signals (Nsig=4).
2.
The first Sub-BITSET tells us that satellite 1 provides signals: 2, 4, 10, 15
3.
The second Sub-BITSET tells us that satellite 3 provides signals: 2, 4, 10
4.
The third Sub-BITSET tells us that satellite 6 provides signals: 2, 4, 10
5.
The fourth Sub-BITSET tells us that satellite 7 provides signals: 2, 15
6.
The fifth Sub-BITSET tells us that satellite 13 provides signals: 2, 4, 10
7.
The sixth Sub-BITSET tells us that satellite 15 provides signals: 2, 15
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