Patent ID: 9106357
Filing Date: 2015-08-11
Classification: H04J,H04L

Abstract:
1. A method, comprising: allocating a midamble channel in a downlink subframe by a base station, wherein the base station and a number of dominant neighboring base stations are located within an OFDMA system; mapping a midamble sequence onto the midamble channel, wherein the midamble sequence is generated based on a predefined base midamble sequence; and transmitting a plurality of midamble signals associated with the mapped midamble sequence, wherein the midamble channel and the midamble sequence are arranged such that the plurality of midamble signals do not interfere with other midamble signals associated with the same midamble sequence mapped onto a second midamble channel received from one of the dominant neighboring base stations, and wherein the midamble channel and the second midamble channel are allocated either in different downlink subframe locations or in non-overlapping subcarrier sets in the same downlink subframe location.