62 / 129 page
Direct Sequence Spread Spectrum Baseband Modem (SSTM)
PRELIMINARY V1.8
57
12.20. Generating the PN and UW sequences
There are many ways of generating the PN and UW sequences, including brute force
search of the complete code space. A more efficient but probably not optimal way of
generating the PN and UW sequences is to
1.
Generate the M and Gold sequences of order N where
(EQ 9)
and where L is the length of the PN or UW sequence.
2.
Because M and Gold sequences are only
bits long, it is necessary to append
an additional bit to these sequences so that they are 2N bits long. The additional bit
should be chosen such that the modified M or Gold sequence is even.
3.
Apply the criteria outlined in the previous sections to pick out the good set of PN
and UW sequences.
NL
2
log
=
2
N
1
–
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
