Patent ID: 11962436
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method for receiving a signal by a base station in a massive multiple-input multiple-output system, the method comprising:
receiving a superimposed signal including a transmission signal of at least one user equipment (UE) among a plurality of UEs, each transmission signal including a pilot signal of a corresponding UE;
calculating a sample covariance matrix from the received superimposed signal using a pilot signal matrix of the at least one UE and the number of antennas of the base station;
obtaining a likelihood function representing a likelihood probability of the received superimposed signal, based on the received superimposed signal and the number of antennas of the base station;
detecting a user index set indicating whether the plurality of UEs transmit a signal using the obtained likelihood function and the sample covariance matrix; and
performing channel estimation of at least one UE transmitting a signal, based on the detected user index set.