US-12620705-B2 - Method for channel irreversibility correction and temporal/spatial separation of polarized beams, and multibeam antenna device using same

US12620705B2US 12620705 B2US12620705 B2US 12620705B2US-12620705-B2

Abstract

Disclosed are a method for temporal/spatial polarized beams and channel non-reciprocity correction and a multi-beam antenna apparatus using the same. According to one aspect of the present disclosure, a multi-beam antenna apparatus includes an array antenna including transmission antenna elements used for forming a plurality of transmission beams and reception antenna elements used for forming a plurality of reception beams. The multi-beam antenna apparatus separates polarized beams temporally and spatially by using two kinds of different orthogonal polarizations, while corrects a channel non-reciprocity which occurs due to temporal polarization separation.

Inventors

Young Chan MOON
Min Seon YUN
Tae Youl OH
Kyung Hoon Kwon

Assignees

KMW INC.

Dates

Publication Date: 20260505
Application Date: 20230501
Priority Date: 20201104

Claims (15)

1 . A method performed by a multi-beam antenna apparatus using two kinds of orthogonal polarizations, wherein the multi-beam antenna apparatus includes an array antenna including transmission antenna elements used to form a plurality of transmission beams and reception antenna elements used to form a plurality of reception beams, the method comprising: generating a plurality of transmission polarization components from transmission signals corresponding to a pair of transmission channels related to each transmission beam; outputting, with respect to a pair of transmission channels related to each transmission beam, either a pair of transmission polarization components corresponding to a first orthogonal polarization or a pair of transmission polarization components corresponding to a second orthogonal polarization among the plurality of transmission polarization components, so that spatially contiguous transmission beams are assigned different orthogonal polarizations; and generating polarization-converted signals, for correcting channel non-reciprocity, from reception signals corresponding to a pair of reception channels related to each reception beam, such that each polarization-converted signal corresponds to an orthogonal polarization of a transmission beam formed in the spatially same direction as the corresponding reception beam.
2 . The method of claim 1 , wherein when a pair of transmission polarization components corresponding to the first orthogonal polarization are radiated to the transmission antenna elements having the first orthogonal polarization, the transmission beam having the first orthogonal polarization is formed, and when a pair of transmission polarization components corresponding to the second orthogonal polarization are radiated to the transmission antenna elements having the first orthogonal polarization, the transmission beam having the second orthogonal polarization is formed by polarization composition.
3 . The method of claim 1 , further comprising: adjusting amplitudes and phases of the one pair of transmission polarization components in order to calibrate variations of amplitude and phase characteristics between one pair of transmission paths related to each transmission beam.
4 . The method of claim 1 , further comprising: adjusting, when an orthogonal polarization of a given transmission beam is different from the orthogonal polarization characteristics of the related transmission antenna elements, the amplitudes and the phases of a pair of transmission polarization components in order to calibrate the variations of the amplitude and phase characteristics between a pair of transmission paths related to the given transmission beam.
5 . The method of claim 1 , further comprising: adjusting amplitudes and phases of the one pair of reception polarization components in order to calibrate variations of amplitude and phase characteristics between one pair of reception paths related to each reception beam.
6 . The method of claim 1 , further comprising: adjusting, when orthogonal polarization characteristics of the reception antenna elements related to the given reception beam are different from the orthogonal polarization of the transmission beam formed in the spatially same direction, the amplitudes and the phases of a pair of reception signals related to the given reception beam in order to calibrate the variations of the amplitude and phase characteristics between a pair of reception paths related to the given reception beam.
7 . The method of claim 1 , wherein the transmission antenna elements have different orthogonal polarization characteristics from those of the reception antenna elements.
8 . The method of claim 1 , wherein the transmission antenna elements have the same orthogonal polarization characteristics as those of the reception antenna elements.
9 . A multi-beam antenna apparatus using two kinds of orthogonal polarizations, the apparatus comprising: an array antenna including transmission antenna elements used for forming a plurality of transmission beams and reception antenna elements used for forming a plurality of reception beams; a transmission polarization composition unit for generating a plurality of transmission polarization components from transmission signals corresponding to a pair of transmission channels related to each transmission beam; a transmission polarization allocation unit for outputting, with respect to a pair of transmission channels related to each transmission beam, either a pair of transmission polarization components corresponding to a first orthogonal polarization or a pair of transmission polarization components corresponding to a second orthogonal polarization among the plurality of transmission polarization components, so that spatially contiguous transmission beams are assigned different orthogonal polarizations; and a polarization conversion unit for generating polarization-converted signals, for correcting channel non-reciprocity, from reception signals corresponding to a pair of reception channels related to each reception beam, such that each polarization-converted signal corresponds to an orthogonal polarization of a transmission beam formed in the spatially same direction as the corresponding reception beam.
10 . The multi-beam antenna apparatus of claim 9 , wherein when a pair of transmission polarization components corresponding to the first orthogonal polarization are radiated to the transmission antenna elements having the first orthogonal polarization, the transmission beam having the first orthogonal polarization is formed, and when a pair of transmission polarization components corresponding to the second orthogonal polarization are radiated to the transmission antenna elements having the first orthogonal polarization, the transmission beam having the second orthogonal polarization is formed by polarization composition.
11 . The multi-beam antenna apparatus of claim 9 , further comprising: a plurality of transmission RF chains forming a plurality of transmission paths corresponding to the plurality of transmission channels and a plurality of reception RF chains forming a plurality of reception paths corresponding to the plurality of reception channels; and an amplitude-phase calibration unit for adjusting amplitudes and phases of the one pair of transmission polarization components in order to variations of amplitude and phase characteristics between one pair of transmission paths related to each transmission beam, and adjusting the amplitudes and the phases for the one pair of reception signals in order to calibrate variations of amplitude and phase characteristics between one pair of reception paths related to each reception beam.
12 . The multi-beam antenna apparatus of claim 11 , wherein the amplitude-phase calibration unit is configured to adjust, when an orthogonal polarization of a given transmission beam is different from the orthogonal polarization characteristics of the related transmission antenna elements, the amplitudes and the phases of a pair of transmission polarization components in order to calibrate the variations of the amplitude and phase characteristics between a pair of transmission paths related to the given transmission beam.
13 . The multi-beam antenna apparatus of claim 11 , wherein the amplitude-phase calibration unit is configured to adjust, when orthogonal polarization characteristics of the reception antenna elements related to the given reception beam are different from the orthogonal polarization of the transmission beam formed in the spatially same direction, the amplitudes and the phases of a pair of reception signals related to the given reception beam in order to calibrate the variations of the amplitude and phase characteristics between a pair of reception paths related to the given reception beam.
14 . The multi-beam antenna apparatus of claim 9 , wherein the transmission antenna elements have different orthogonal polarization characteristics from those of the reception antenna elements.
15 . The multi-beam antenna apparatus of claim 9 , wherein the transmission antenna elements have the same orthogonal polarization characteristics as those of the reception antenna elements.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application is a Continuation of International Application No. PCT/KR2021/015883, filed on Nov. 4, 2021, which claims priority to Patent Application No. 10-2020-0145879 filed in Korea on Nov. 4, 2020, and Patent Application No. 10-2021-0150406 filed in Korea on Nov. 4, 2021, which are incorporated herein by reference in their entirety. TECH/VICAL FIELD The present disclosure relates to an antenna apparatus which may be generally used in a cellular communication system, and more particularly, to a method for temporally and spatially separating polarized beams and correcting a channel non-reciprocity which occurs due to polarization separation, and an antenna apparatus using the same. BACKGROUND Contents described in this section merely provide background information on the present disclosure and do not constitute the related art. In order to meet a demand for wireless data traffic, which is on the rise after commercialization of a 4th generation (4G) communication system, efforts are being made to develop an improved 5G generation communication system or pre-5G communication system. For this reason, the 5G communication system or the pre-5G communication system is called a beyond 4G network communication system or a post long term evolution (LTE) system. In order to achieve a high data transmission rate, implementation of the 5G communication system in an ultra-high frequency (mmWave) band (e.g., 60 GHz band) is considered. In order to alleviate a path loss of radio waves in the ultra-high frequency band and to increase a transmission distance of the radio waves, in the 5G communication system, beamforming, massive multiple input and multiple output (MIMO), full dimensional MIMO (FD-MIMO), array antenna, and large-scale antenna technologies are being discussed. In addition, in order to improve a network of the system, in the 5G communication system, technological development of advanced small cell, cloud radio access network (RAN), ultra-dense network, Device to Device communication (D2D), wireless backhaul, moving network, cooperative communication, Coordinated Multi-Points (CoMP), and reception interference cancellation are being made. Besides, in the 5G system, Hybrid Frequency Shift Keying and Quadrature Amplitude Modulation (FQAM) and Sliding Window Superposition Coding (SWSC) which are advanced coding modulation (ACM) scheme, and Filter Bank Multi Carrier (FBMC), Non Orthogonal Multiple Access (NOMA), and Sparse Code Multiple Access (SCMA) which are advanced access technologies are developed. In order to overcome a problem of the path loss due to characteristics of the ultra-high frequency band (e.g., mmWave), the 5G communication system is operated to increase a signal gain by using a beamforming technique. SUMMARY Technical Problem An aspect of the present disclosure provides a method for temporally and spatially separating polarized beams by using two kinds of different orthogonal polarizations, while correcting a channel non-reciprocity which occurs due to polarization separation and a multi-beam antenna apparatus using the same. Technical Solution An aspect of the present disclosure provides a method for temporal/spatial polarized beams and channel non-reciprocity correction and a multi-beam antenna apparatus using the same. According to one aspect of the present disclosure, presented is a method performed by a multi-beam antenna apparatus. The multi-beam antenna apparatus comprises an array antenna which includes transmission antenna elements used for forming a plurality of transmission beams and reception antenna elements used for forming a plurality of reception beams. The method includes generating a plurality of transmission polarization components from transmission signals corresponding to a pair of transmission channels related to each transmission beam, and outputting a pair of transmission polarization components corresponding to a first orthogonal polarization or a pair of transmission polarization components corresponding to a second orthogonal polarization among the plurality of transmission polarization components with respect to a pair of transmission channels related to each transmission beam so that spatially contiguous transmission beams have different orthogonal polarizations. In some embodiments, in order to correct a channel non-reciprocity, the method further includes generating a plurality of reception polarization components from reception signals corresponding to a pair of reception channels related to each reception beam, and outputting a pair of reception polarization components corresponding to orthogonal polarizations of the transmission beam formed in the spatially same direction among the plurality of reception polarization components with respect to a pair of reception channels related to each reception beam. Alternatively, in order to correct a channel non-reciprocity, the method further includes generating polarization-co