Patent ID: 8189520

Claim:
A preamble Pseudo Noise (PN) code allocation method employing a plurality of Frequency Allocations (FAs), the method comprising: determining an index for each of a plurality of FAs, at an FA index determining device; allocating a first of a plurality of preamble PN indexes to a first FA at a preamble PN index allocation device, wherein each of the plurality of preamble PN indexes corresponds to a different PN code; determining offsets between an index of the first FA and each remaining FA of the plurality of FAs at a preamble PN index allocation device for remaining FA indexes; and allocating preamble PN indexes to the remaining FAs, wherein each preamble PN index is shifted from the first preamble PN index by an amount based on an offset of its corresponding remaining FA index, and wherein a different preamble PN index is allocated to each FA; and transmitting signals from the base station over the plurality of FAs having corresponding allocated preamble PN indexes.