Serial-parallel combined acquisition of PN sequences for DS/SS system

A new serialparallel combined acquisition scheme had been proposed for the acquisition of PN sequences for DS/SS system,and the acquisition problem of long sequences buried deeply in noise in particular. A block diagram had been given for the implementation of hardware, a mathematical model had been established for the acquisition system,and a mathematic expression had been derived using the state transfer function for the average acquisition time. The acquisition performance of the system had been analyzed in detail with phase error of PN sequences, Doppler shift and background noise taken into consideration.