Patent ID: 11962436
Assignee: POSTECH RESEARCH AND BUSINESS DEVELOPMENT FOUNDATION
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 8:
9. A base station configured to receive a signal in a massive multiple-input multiple-output system, the base station comprising:
a transceiver configured to receive 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; and
at least one processor configured to:
calculate 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;
obtain 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;
detect a user index set indicating whether the plurality of UEs transmit a signal using the obtained likelihood function and the sample covariance matrix; and
perform channel estimation of at least one UE transmitting a signal, based on the detected user index set.