Introduction to pseudo-code

Pseudo-random noise code sequence is a common address code. Pseudo-random code sequence has similar basic characteristics to random sequence, and it is a kind of periodic binary sequence that seems random but has regularity. If the transmitted data sequence is completely randomly scrambled, the receiver cannot recover the original sequence. In practical systems, a sufficiently random sequence is used. On the one hand, the random sequence is unrecognizable to the non-target receiver, on the other hand, the target receiver can recognize and easily generate the random sequence synchronously.

Common PN offset refers to the offset index of PN code. In IS-95A CDMA system, the period of PN short code is 32,768 chips (that is, you can see that the power of 2 is 65,438+05 = 32,768), and the short code is divided every 64 chips, so 565,438+02 (= 32,768/64) short codes with different phases are obtained. However, these 5 12 PN offset values may not all be used, and the available PN offset values can only be finally determined after the pilot INC is determined according to the actual situation such as the network size.