Patent ID: 9479298
Filing Date: 2016-10-25
CPC Classification: H04B,H04J,H04L,H04W,Y02D

Claim Text:
1. A method for using demodulation reference signals to provide side information for interference cancellation, comprising: preparing a sub-frame comprising two slots and configuring a physical resource block (PRB) for each slot, wherein each PRB comprises twelve Orthogonal Frequency Division Multiplexing (OFDM) subcarriers transmitting for a duration of 7 OFDM symbols per slot; allocating, in resource elements on each of three of twelve OFDM subcarriers, two pairs of demodulation reference signals (DMRS) to form three DMRS sets, the DMRS sets comprising known sequences; mapping symbols with a first modulation for the two pairs of demodulation reference signals to three of the twelve OFDM subcarriers for transmission; and adding a second modulation to a first of the three DMRS sets and adding a third modulation to a second of the three DMRS sets to indicate side information regarding an interfering signal for use in mitigating the interfering signal, wherein the first modulation, the second modulation, and the third modulation encode the side information, and wherein the side information is distinct from the known sequences.