Patent ID: 9749168
Date: 2017-08-29
CPC Classifications: H04B,H04J,H04L,H04W

Claim:
1. A method for a mobile device served by a base station in a group of adjacent cells in a multi-cell, Orthogonal Frequency Division Multiple Access (OFDMA) wireless communication system, wherein base stations in the group of adjacent cells are synchronized in time and frequency to a common reference source, the method comprising: receiving, by the mobile device, a plurality of signals in a time slot transmitted by the base stations in the group of adjacent cells using the same frequency subcarrier indices and the same time indices, the plurality of signals comprising a set of common pilot signals that has been randomized in the frequency-domain, wherein the frequency-domain signal randomization is specific to the group of adjacent cells and different from frequency-domain signal randomization applied on pilot signals outside of the group of adjacent cells; and determining a composite channel coefficient for a composite channel based on the frequency-domain randomized set of common pilot signals, the composite channel corresponding to an aggregate of different channels from the base stations in the group of adjacent cells to the mobile device.