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公开(公告)号：US11962436B2
公开(公告)日：2024-04-16
申请号：US17925183
申请日：2021-05-14
Inventor： Namyoon Lee , Hyowon Lee
IPC: H04L25/02
CPC classification number: H04L25/021 , H04L25/0204
Abstract: Disclosed are a user detection technique, and a method and apparatus for channel estimation in a wireless communication system supporting massive multiple-input multiple-output. The method comprises the steps of: receiving a superimposed signal including a transmission signal of at least one user equipment (UE) from among a plurality of user equipments, wherein each transmission signal includes a pilot signal of a corresponding user equipment; calculating a sample covariance matrix from the received superimposed signal by using the number of antennas of a base station and a pilot signal matrix of the at least one user equipment; calculating a likelihood function indicating the likelihood probability of the received superimposed signal, on the basis of the number of antennas of the base station and the received superimposed signal; detecting a user index set indicating whether or not the plurality of user equipments have transmitted signals, by using the calculated likelihood function and sample covariance matrix; and performing channel estimation of the at least one user equipment that is transmitting the signal, on the basis of the detected user index set.
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公开(公告)号：US11658682B2
公开(公告)日：2023-05-23
申请号：US17129725
申请日：2020-12-21
Inventor： Namyoon Lee
CPC classification number: H03M13/05 , H03M13/251 , H04L1/0057
Abstract: The inventive concept relates to method for encoding and decoding sparse codes and orthogonal sparse superposition codes. A sparse code encoding method which is to be performed by an encoding apparatus, according to an embodiment of the inventive concept may include selecting an index set that is a part of a code block by using an information bit, and mapping a codeword less than a preset size to the selected index set.
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