Method for temporally/spatially separating polarized beams and correcting channel irreversibility, and multi-beam antenna device using same
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.
1. A method performed by a multi-beam antenna apparatus using two kinds of dual 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 a pair of transmission polarization components corresponding to a first dual orthogonal polarization or a pair of transmission polarization components corresponding to a second dual orthogonal polarization among the plurality of transmission polarization components with respect to the pair of transmission channels related to each transmission beam so that spatially contiguous transmission beams have different dual orthogonal polarizations;
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 having the same dual orthogonal polarizations as dual orthogonal polarizations of the transmission beam formed in the spatially same direction among the plurality of reception polarization components with respect to the pair of reception channels related to each reception beam.
2. The method of claim 1 , wherein when the pair of transmission polarization components corresponding to the first dual orthogonal polarization are radiated to the transmission antenna elements having the first dual orthogonal polarization, the transmission beam having the first dual orthogonal polarization is formed, and
when the pair of transmission polarization components corresponding to the second dual orthogonal polarization are radiated to the transmission antenna elements having the first dual orthogonal polarization, the transmission beam having the second dual orthogonal polarization by polarization composition is formed.
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 a dual orthogonal polarization of a given transmission beam is different from the dual orthogonal polarization characteristics of the related transmission antenna elements, amplitudes and phases of the 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 ene-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 dual orthogonal polarization characteristics of the reception antenna elements related to a given reception beam are different from the dual orthogonal polarization of the transmission beam formed in the spatially same direction, amplitudes and phases of a pair of reception signals related to the given reception beam in order to calibrate 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 dual orthogonal polarization characteristics from those of the reception antenna elements.
8. The method of claim 1 , wherein the transmission antenna elements have the same dual orthogonal polarization characteristics as those of the reception antenna elements.
9. A multi-beam antenna apparatus using two kinds of dual 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 a pair of transmission polarization components corresponding to a first dual orthogonal polarization or a pair of transmission polarization components corresponding to a second dual orthogonal polarization among the plurality of transmission polarization components with respect to the pair of transmission channels related to each transmission beam so that spatially contiguous transmission beams have different dual orthogonal polarizations;
a reception polarization composition unit for generating a plurality of reception polarization components from reception signals corresponding to a pair of reception channels related to each reception beam;
a reception polarization allocation unit for outputting a pair of reception polarization components having the same dual orthogonal polarizations as dual orthogonal polarizations of the transmission beam formed in the spatially same direction among the plurality of reception polarization components with respect to the pair of reception channels related to each reception beam; and
a polarization allocation control unit for transmitting an allocation control signal indicating the same dual orthogonal polarizations as dual orthogonal polarizations selected for the transmission polarization allocation unit, to the reception polarization allocation unit.
10. The multi-beam antenna apparatus of claim 9 , wherein when the pair of transmission polarization components corresponding to the first dual orthogonal polarization are radiated to the transmission antenna elements having the first dual orthogonal polarization, the transmission beam having the first dual orthogonal polarization is formed, and
when the pair of transmission polarization components corresponding to the second dual orthogonal polarization are radiated to the transmission antenna elements having the first dual orthogonal polarization, the transmission beam having the second dual orthogonal polarization by polarization composition is formed.
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 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, and adjusting amplitudes and phases for the 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.
12. The multi-beam antenna apparatus of claim 11 , wherein the amplitude-phase calibration unit is configured to adjust, when a dual orthogonal polarization of a given transmission beam is different from the dual orthogonal polarization characteristics of the related transmission antenna elements, amplitudes and phases of the 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 dual orthogonal polarization characteristics of the reception antenna elements related to a given reception beam are different from the dual orthogonal polarization of the transmission beam formed in the spatially same direction, amplitudes and 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 dual 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 dual orthogonal polarization characteristics as those of the reception antenna elements.