US 11,817,932 B2
Spatial multiplexing method and device using polarized wave in multibeam system
Tae Youl Oh, Hwaseong-si (KR); Joon Hyong Shim, Yongin-si (KR); Min Seon Yun, Anyang-si (KR); Jae Young Choi, Yongin-si (KR); Kyung Hoon Kwon, Incheon (KR); Young Chan Moon, Suwon-si (KR); and Oh Seog Choi, Hwaseong-si (KR)
Assigned to KMW INC., Hwaseong-si (KR)
Filed by KMW INC., Hwaseong-si (KR)
Filed on Oct. 29, 2021, as Appl. No. 17/513,926.
Application 17/513,926 is a continuation of application No. PCT/KR2020/017421, filed on Dec. 2, 2020.
Claims priority of application No. 10-2019-0160606 (KR), filed on Dec. 5, 2019; and application No. 10-2020-0046256 (KR), filed on Apr. 16, 2020.
Prior Publication US 2022/0052750 A1, Feb. 17, 2022
Int. Cl. H04B 7/06 (2006.01); H04B 7/0456 (2017.01); H04B 7/10 (2017.01); H04B 7/0408 (2017.01); H04L 5/00 (2006.01)
CPC H04B 7/0697 (2013.01) [H04B 7/0469 (2013.01); H04B 7/10 (2013.01); H04B 7/0408 (2013.01); H04L 5/0007 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A spatial multiplexing method using polarization in a multi-beam system, the method comprising:
determining different phases for forming a first beam and a second beam spatially adjacent to each other, and determining different orthogonal polarizations to be applied to the first beam and the second beam, wherein the orthogonal polarization to be applied to the first beam is different from the orthogonal polarization to be applied to the second beam;
precoding a signal so that the first beam and the second beam have the determined different phases; and
converting polarization of the precoded signal so that the first beam and the second beam have the determined different orthogonal polarizations,
wherein the converting of the polarization of the precoded signal comprises converting the polarization of the precoded signal into orthogonal cross-polarization (±45 degrees) and orthogonal vertical/horizontal polarization using the following equation:

OG Complex Work Unit Math
where a and b represent any one of the orthogonal cross-polarization (±45 degrees) and the orthogonal vertical/horizontal polarization, and a+b and a+bejπ represent the other one of the orthogonal cross-polarization (±45 degrees) and the orthogonal vertical/horizontal polarization.