Patent ID: 9014127
Filing Date: 2015-04-21
Classification: H04B,H04J,H04L,H04W

Abstract:
1. A method for transmitting signals by a base station in a wireless communication system, the method comprising: mapping, by the base station, a plurality of reference signals to one or more resource blocks, the mapping including code division multiplexing the plurality of reference signals into at least one of a first group or a second group of resource elements using orthogonal sequences corresponding to a respective one of the plurality of reference signals such that each reference signal for a first set of antenna ports is mapped to the first group of resource elements in the one or more resource blocks and each reference signal for a second set of antenna ports is mapped to the second group of resource elements in the one or more resource blocks, wherein the first set of antenna ports comprises antenna ports {N, N+1, N+4, N+6} and the second set of antenna ports comprises antenna ports {N+2, N+3, N+5, N+7}; and transmitting, by the base station to a mobile station, the mapped plurality of reference signals on the respective first and second set of antenna ports.