No, PN is the abbreviation of English Part Number, that is: zero (part) number. On behalf of the factory batch, this is mainly for the internal use of the factory itself.
The most widely known two-bit P-N Code is the maximum length shift register sequence, or m-sequence for short, which has a length of 2 to the Nth power - 1 bit, generated by a m-level register with linear feedback. At the same time, pn codes are divided into long codes and short codes, which play different roles in CDMA.
The common PN offset is the PN code bias index, in the IS-95A CDMA system, PN short-code period is 32768 (that is, you see 2 of the 15 times = 32768) chip, the short code every 64 chip for the division, so we get a 512 (= 32768 / 64) a different phase of the short code, the short code will be numbered according to 0 to 511 sequential numbering, the short code, the short code, the short code and the short code, the short code, the short code and the short code. These short codes are numbered from 0 to 511, and the number is called the PN code bias index.
The 512 PN Offset values are not necessarily all used, and it is necessary to determine the step size (Pilot INC) according to the size of the network and other practical situations before finally determining the PN Offset values that can be used.