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US 12,261,686 B2Granted
Control apparatus, OAM mode-multiplexing transmitting apparatus, OAM mode-multiplexing receiving apparatus, control method, and non-transitory computer readable medium
AssigneeNEC Corporation
InventorEisaku Sasaki
Life of this patent
Estimating the term…
Abstract
An OAM mode-multiplexing transmitting apparatus includes an OAM transmitting processing unit, a phase adjustment unit, a transmitting radio unit, a UCA (Uniform Circular Array) antenna, and a control unit (control apparatus). The UCA antenna includes a plurality of transmitting antenna elements. In the control apparatus, an acquisition unit acquires “information corresponding to a transmitting-side axis misalignment”. A beam control unit controls a beam of the UCA antenna by controlling phases of N OAM mode-multiplexing signals based on the acquired “information corresponding to the transmitting-side axis misalignment”.
Claims16
A control apparatus configured to control an OAM (Orbital Angular Momentum) mode-multiplexing transmitting apparatus configured to communicate with an OAM mode-multiplexing receiving apparatus, wherein
- the OAM mode-multiplexing transmitting apparatus comprises:
- a transmitting-side UCA (Uniform Circular Array) including a plurality of transmitting antenna elements arranged in a rotational-symmetrical manner and at equal distances from a center of the rotational symmetry, where the number N of transmitting antenna elements is equal to or greater than four;
- a fixed-weight OAM transmission processing unit configured to form a plurality of OAM (Orbital Angular Momentum) mode-multiplexing signals each of which is transmitted from a respective one of the plurality of transmitting antenna elements, where the number of OAM mode-multiplexing signals is equal to or less than N;
- and
- a phase adjustment unit configured to adjust phases of the plurality of OAM mode-multiplexing signals, the phase adjustment unit being disposed between the plurality of transmitting antenna elements and the OAM transmission processing unit, and
- the control apparatus comprises:
- at least one memory storing instructions, and
- at least one processor configured to execute, according to the instructions, a process comprising:
- acquiring a pair of a value of first phase shifter phase information and a value of second phase shifter phase information from the OAM mode-multiplexing receiving apparatus;
- first calculating the value of the first phase shifter phase information for each of the transmitting antenna elements from the acquired value of the first phase shifter phase information, and second calculating the value of the second phase shifter phase information for each of the transmitting antenna elements from the acquired value of the second phase shifter phase information;
- and
- adding, for each of the transmitting antenna elements, the value of the first phase shifter phase information and the value of the second phase shifter phase information, and thereby third calculating, for each of the transmitting antenna elements, a phase shift value used for a phase adjustment of an OAM mode-multiplexing signal corresponding to the transmitting antenna element, and
- the pair of the value of the first phase shifter phase information and the value of the second phase shifter phase information is calculated, in the OAM mode-multiplexing receiving apparatus, based on information corresponding to a transmitting-side axis misalignment, the information corresponding to the transmitting-side axis misalignment being a deviation of an array plane of the transmitting-side UCA from a reference plane of the transmitting-side UCA.
10 more elements
A control apparatus configured to control an OAM (Orbital Angular Momentum) mode-multiplexing receiving apparatus, wherein
- the OAM mode-multiplexing receiving apparatus comprises:
- a receiving-side UCA (Uniform Circular Array) including a plurality of receiving antenna elements arranged in a rotational-symmetrical manner and at equal distances from a center of the rotational symmetry;
- and
- an adaptively-controlled OAM (Orbital Angular Momentum) receiving processing unit configured to extract a reception signal corresponding to one OAM mode by multiplying a plurality of reception signals by an OAM reception weight vector, each of the plurality of reception signals corresponding to a respective one of the plurality of receiving antenna elements, and the OAM reception weight vector being a weight vector obtained as a result of adaptive control corresponding to the one OAM mode, and
- the control apparatus comprises:
- at least one memory storing instructions, and
- at least one processor configured to execute, according to the instructions, a process comprising:
- specifying information corresponding to a transmitting-side axis misalignment based on an OAM reception weight amplitude component included in the OAM reception weight vector, and calculating a pair of a value of first phase shifter phase information and a value of second phase shifter phase information based on the information corresponding to the transmitting-side axis misalignment, the information corresponding to the transmitting-side axis misalignment being a deviation of an array plane of the transmitting-side UCA of the OAM mode-multiplexing transmitting apparatus from a reference plane of the transmitting-side UCA;
- and
- transmitting the pair of the value of the first phase shifter phase information and the value of the second phase shifter phase information to the OAM mode-multiplexing transmitting apparatus.
7 more elements
A control apparatus configured to control an OAM (Orbital Angular Momentum) mode-multiplexing transmitting apparatus configured to communicate with an OAM mode-multiplexing receiving apparatus, wherein
- the OAM mode-multiplexing transmitting apparatus comprises:
- a transmitting-side UCA (Uniform Circular Array) including a plurality of transmitting antenna elements arranged in a rotational-symmetrical manner and at equal distances from a center of the rotational symmetry, where the number N of transmitting antenna elements is equal to or greater than four;
- a fixed-weight OAM transmission processing unit configured to form a plurality of OAM (Orbital Angular Momentum) mode-multiplexing signals each of which is transmitted from a respective one of the plurality of transmitting antenna elements, where the number of OAM mode-multiplexing signals is equal to or less than N;
- and
- a phase adjustment unit configured to adjust phases of the plurality of OAM mode-multiplexing signals, the phase adjustment unit being disposed between the plurality of transmitting antenna elements and the OAM transmission processing unit, and
- the control apparatus comprises:
- at least one memory storing instructions, and
- at least one processor configured to execute, according to the instructions, a process comprising:
- acquiring information corresponding to a transmitting-side axis misalignment, the transmitting-side axis misalignment being a deviation of an array plane of the transmitting-side UCA from a reference plane of the transmitting-side UCA;
- and
- outputting a signal for controlling the phase adjustment unit based on the information corresponding to the acquired transmitting-side axis misalignment.
8 more elements
Dependencies are inferred from the claim text.