公开(公告)号：US07925217B2

公开(公告)日：2011-04-12

申请号：US11708706

申请日：2007-02-21

申请人： Joonbae Park ,  Kyeongho Lee

发明人： Joonbae Park ,  Kyeongho Lee

IPC分类号： H04B17/00 ,  H04B1/10

CPC分类号： H04B17/0085 ,  H04B17/21

摘要： Embodiments of methods receiving circuits and apparatuses compensate for an IQ mismatch using a test signal positioned in a guard band. One embodiment of a method can include converting a sum of a received signal and a test signal positioned in a guard band to a first signal and a second signal of an intermediate frequency or a base band using an IQ mixer, detecting the IQ mismatch using the test signal respectively included in subsequent signals corresponding to the first signal and the second signal and compensating for the detected IQ mismatch using the IQ mismatch.

摘要翻译： 接收电路和装置的方法的实施例使用位于保护带中的测试信号来补偿IQ失配。 方法的一个实施例可以包括使用IQ混合器将接收信号和位于保护带中的测试信号的和转换成中频或基带的第一信号和第二信号，使用IQ混合器检测IQ失配 测试信号分别包括在对应于第一信号和第二信号的后续信号中，并且使用IQ失配来补偿检测到的IQ失配。

公开(公告)号：US11973553B2

公开(公告)日：2024-04-30

申请号：US17917930

申请日：2021-01-12

申请人： GCT RESEARCH, INC

发明人： Jeong Min Kim ,  Hyungkoo Lee

IPC分类号： H04B7/06 ,  H04B1/3827

CPC分类号： H04B7/0617 ,  H04B1/3827 ,  H04B7/0691

摘要： Proposed is a mobile router for transmitting and receiving millimeter waves to and from a base station, the mobile router including a first member including an antenna array configured to transmit and receive the millimeter waves, a second member, and an angle adjustment part connecting the first member to the second member, wherein the angle adjustment part is formed such that the first member and the second member are adjusted at a predetermined angle so as to allow the antenna array to transmit and receive the millimeter waves at a specific angle. The first member including the antenna array is configured to be unfolded at a predetermined angle with respect to the second member in order to transmit and receive a 5G millimeter wave beam signal at a specific angle, and thus a user can optimally adjust the transmission/reception sensitivity of 5G millimeter waves.

公开(公告)号：US11316618B2

公开(公告)日：2022-04-26

申请号：US16729597

申请日：2019-12-30

申请人： GCT Research, Inc.

发明人： Tae Won Park ,  Ji Ho Jang ,  In Seok Hwang

IPC分类号： H04L1/16 ,  H04W72/00 ,  H04W72/04 ,  H04W56/00 ,  H03M13/09 ,  H04L1/00 ,  H03M13/13

摘要： The present invention relates to a method of accumulating and decoding a PBCH signal received by a 5G NR receiver, the method including: generating an inversion vector for negating at least one bit of a system frame number (SFN) included the received PBCH signal; performing accumulation over at least one frame by performing modulo addition on the generated inversion vector and the received PBCH signal; decoding the accumulated PBCH signals; and checking validity of the decode PBCH and reconstructing the SFN.

公开(公告)号：US07831215B2

公开(公告)日：2010-11-09

申请号：US11708705

申请日：2007-02-21

申请人： Joonbae Park ,  Kyeongho Lee

发明人： Joonbae Park ,  Kyeongho Lee

IPC分类号： H04B1/40

CPC分类号： H04B1/525

摘要： Embodiments of methods, transceiver circuits, and systems can compensate an IQ mismatch (e.g., Tx or Rx) or a carrier leakage using a plurality of local oscillators. One embodiment of a transceiver can include a first up-conversion IQ mixer, a second up-conversion IQ mixer, a first down-conversion IQ mixer with an input to receive an output of the second up-conversion IQ mixer, a second down-conversion IQ mixer with an input to receive an output of the first up-conversion IQ mixer, a first local oscillator to generate a first IQ LO signal for the first up-conversion IQ mixer and the first down-conversion IQ mixer, and a second local oscillator to generate a second IQ LO signal for the second up-conversion IQ mixer and the second down-conversion IQ mixer.

摘要翻译： 方法，收发器电路和系统的实施例可以使用多个本地振荡器补偿IQ失配（例如，Tx或Rx）或载波泄漏。 收发器的一个实施例可以包括第一上变频IQ混频器，第二上变频IQ混频器，具有用于接收第二上变频IQ混频器的输出的输入的第一下变频IQ混频器， 转换IQ混频器，具有用于接收第一上变频IQ混频器的输出的输入端，第一本地振荡器，用于产生用于第一上变频IQ混频器和第一下变频IQ混频器的第一IQ LO信号，以及第二本地振荡器 本地振荡器产生用于第二上变频IQ混频器和第二下变频IQ混频器的第二IQ LO信号。

公开(公告)号：US20230198589A1

公开(公告)日：2023-06-22

申请号：US17917930

申请日：2021-01-12

申请人： GCT RESEARCH, INC

发明人： Jeong Min KIM ,  Hyungkoo LEE

IPC分类号： H04B7/06 ,  H04B1/3827

CPC分类号： H04B7/0617 ,  H04B1/3827 ,  H04B7/0691

摘要： Proposed is a mobile router for transmitting and receiving millimeter waves to and from a base station, the mobile router including a first member including an antenna array configured to transmit and receive the millimeter waves, a second member, and an angle adjustment part connecting the first member to the second member, wherein the angle adjustment part is formed such that the first member and the second member are adjusted at a predetermined angle so as to allow the antenna array to transmit and receive the millimeter waves at a specific angle. The first member including the antenna array is configured to be unfolded at a predetermined angle with respect to the second member in order to transmit and receive a 5G millimeter wave beam signal at a specific angle, and thus a user can optimally adjust the transmission/reception sensitivity of 5G millimeter waves.

公开(公告)号：US20230008254A1

公开(公告)日：2023-01-12

申请号：US17858020

申请日：2022-07-05

申请人： GCT Research, Inc.

发明人： Eal Wan LEE ,  Jeong Min KIM

IPC分类号： H04B7/08 ,  H04L1/00 ,  H04W4/02

摘要： Provided are an electronic device and an operation method of the electronic device for finding a direction of a neighboring device effectively in a wireless communication system without additional hardware. According to the present disclosure, there is provided an electronic device for finding a direction of a neighboring device in a wireless communication system, the electronic device includes an antenna array including a first antenna and a second antenna for receiving a radio frequency (RF) signal, an antenna switch configured to switch antennas for receiving the RF signal among the plurality of antennas, and a controller. The controller is configured to control the antenna switch to receive the RF signal from the neighboring device through the first antenna, control the antenna switch to switch from the first antenna to the second antenna to receive the RF signal during a time interval in which an error detection code is detected, and detect the direction in which the neighboring device is located based on a result of decoding the error detection code.

公开(公告)号：US10931341B2

公开(公告)日：2021-02-23

申请号：US16748859

申请日：2020-01-22

申请人： GCT Research, Inc.

发明人： In Seok Hwang ,  Ji Ho Jang ,  Tae Won Park

IPC分类号： H04L1/02 ,  H04B7/0456 ,  H04L5/00 ,  H04B7/06

摘要： The present invention relates to a CSI extraction method in a MIMO receiver used in a wireless communication system, the method including: obtaining an effective channel matrix by matrix multiplication of a precoding matrix and a channel estimation value obtained through a CSI-RS; calculating an upper and a lower bound of a minimum distance for each layer through QR decomposition for the effective channel matrix; and mapping the upper and the lower bound of the minimum distance for each layer to each codeword, and extracting a mean mutual information per bit (MMIB) metric that is a transmission capacity per unit frequency for each codeword. According to the present invention, QR decomposition and a MMIB metric are used to obtain the minimum distance for each layer without a multidimensional search process, whereby the CSI is extracted with fewer operations than the conventional method when the MIMO transmission order is high.

公开(公告)号：US10897294B2

公开(公告)日：2021-01-19

申请号：US16701157

申请日：2019-12-03

申请人： GCT Research, Inc.

发明人： Ji Ho Jang ,  In Seok Hwang ,  Tae Won Park

IPC分类号： H04B7/0456

摘要： The present invention relate to a method of extracting an optimum rank without considering a precoding matrix indicator (PMI) in a multiple-input multiple-output (MIMO) receiver, the method including calculating a correlation matrix from a MIMO channel matrix between a base station antenna and an MIMO receiver antenna; obtaining an eigenvalue from the correlation matrix; calculating channel capacity for each rank on the basis of the obtained eigenvalue; and selecting a rank corresponding to a channel capacity having a maximum value among the calculated channel capacities for each rank as an optimum rank.