Patent ID: 9634785
Date: 2017-04-25
CPC Classifications: H04B,H04J,H04L,H04W

Claim:
1. An interference cancellation method of user equipment (UE) in a cellular communication system, the method comprising: receiving signals including a desired signal and an interference signal from one or more base stations; determining a maximum likelihood (ML) decision metric to determine a value “l” of a rank indicator (RI), a value “p” of a precoding matrix indicator (PMI), and a value “q” of a modulation (MOD) level of the interference signal; applying a logarithm to the ML decision metric, and applying a maximum-log approximation to a serving data vector and an interference data vector, which are included in the ML decision metric; determining the values of “l,” “p,” and “q” using the applied ML decision metric; and cancelling the interference signal from the received signals using the determined values of “l,” “p,” and “q”.