Patent ID: 9077400
Filing Date: 2015-07-07
Classification: H04B,H04J,H04L

Abstract:
1. An interference alignment method in a wireless communication system, the interference alignment method comprising: generating a plurality of Interference Alignment (IA)-encoded signal vectors by multiplying a plurality of input symbols by precoding vectors for IA; mapping the IA-encoded signal vectors to subcarriers that are un-equally spaced; performing Inverse Fast Fourier Transform (IFFT) on the IA-encoded signal vectors for Orthogonal Frequency Division Multiplexing (OFDM) modulation to generate OFDM symbols; up-converting the OFDM symbols into wireless signals and transmitting the wireless signals from a first transmitter of three transmitters to three receivers; and forwarding information regarding the precoding vectors used in the first, second, and the third transmitters to a first receiver of the three receivers, so that the first receiver can perform the IA decoding process of a desired signal, wherein the second and third transmitters share the same frequency resources with the first transmitter and transmit the wireless signals to the three receivers.