Patent ID: 8457039
Filing Date: 2013-06-04
Classification: H04L

Abstract:
1. A method of establishing communications with a remote transceiver that receives data block signals from other transceivers, comprising the steps of: producing a random access preamble on a plurality of preamble sub-carriers each having a first bandwidth in a frequency spectrum; wherein a plurality of data block signal sub-carriers having a second bandwidth different from the first bandwidth is allocated adjacent to the plurality of preamble sub-carriers in the frequency spectrum for simultaneous transmission of the data signals by the other transceivers; producing a guard band having a bandwidth allocated between the random access preamble and the adjacent data block signals using another plurality of the preamble sub-carriers; wherein the random access preamble has a total bandwidth approximately equal to an integer multiple of the bandwidth of an adjacent one of the plurality data signal sub-carriers; wherein the total bandwidth of the guard band is approximately equal to an integer multiple of the second bandwidth of an adjacent one of the plurality of data signal sub-carriers; and transmitting the random access preamble to the remote transceiver.