公开(公告)号：US20190052235A1

公开(公告)日：2019-02-14

申请号：US16077917

申请日：2016-03-28

Applicant: SOLiD, INC.

Inventor： Kwang Nam SEO ,  Do Yoon KIM ,  Hyoung Ho KIM

IPC: H03F1/32 ,  H03F3/24 ,  H03F3/19 ,  H04B1/04

Abstract: The present invention, which relates to a multi-path communication device for sharing a feedback path for digital pre-distortion, includes: a DPD processing unit configured to output a plurality of pre-distorted signals by respectively pre-distorting a plurality of input signals, to output an nth control signal when an nth input signal is input, and to output an nth pre-distorted signal using an nth feedback signal input in response to the nth control signal; a power amplifying unit configured to amplify each of the plurality of pre-distorted signals and output a plurality of amplified signals; a signal combining unit configured to combine some of each of the plurality of amplified signals and output combined feedback signal; and a signal selection unit configured to select and output only the nth feedback signal from the combined feedback signal according to the input nth control signal, thereby preventing an increase in the size of a device and manufacturing cost thereof caused by a plurality of DPD feedback paths.

公开(公告)号：US20180310226A1

公开(公告)日：2018-10-25

申请号：US16021913

申请日：2018-06-28

Applicant: SOLiD, INC.

Inventor： Do Yoon KIM ,  Hyoung Ho KIM ,  Kwang Nam SEO

IPC: H04W40/22 ,  H04B7/155 ,  H04B3/36 ,  H04W88/08 ,  H04W56/00

CPC classification number: H04W40/22 ,  H04B3/36 ,  H04B7/155 ,  H04L25/02 ,  H04L25/10 ,  H04L25/20 ,  H04W56/001 ,  H04W88/08

Abstract: There is provided a main unit and a distributed antenna system including the same. The main unit for constituting a distributed antenna system that receives a base station signal from at least one base station, transmits the base station signal to at least one user terminal, and includes a plurality of main units, the main unit includes: a first receiver for receiving a first group of base station signals; a second receiver for receiving a second group of base station signals from another main unit; a signal combiner for combining the first and second groups of base station signals; and a delay compensator for compensating for time delay corresponding to a path between the main unit and the other main unit with respect to the first group of base station signals before combining the first and second groups of base station signals.