Patent ID: 6157631
Filing Date: 2000-12-05
Classification: H04B,H04L

Abstract:
A method for generating an unsynchronized pilot channel for an unsynchronized base station in a cellular communications system having synchronized base stations and unsynchronized base stations, wherein the synchronized base stations are synchronized to system time and have a common pilot PN sequence used for all synchronized pilot channels, the method comprising the steps of:selecting a marker sequence comprised of a portion of the common pilot PN sequence;generating a coded portion of an unsynchronized pilot PN sequence to identify a selected unsynchronized base station;combining the marker sequence and the coded portion of the unsynchronized pilot PN sequence to form the unsynchronized pilot PN sequence; andspreading an unsynchronized pilot channel baseband signal of an unsynchronized base station with the unsynchronized pilot PN sequence to produce the unsynchronized pilot channel.