Antenna control method and antenna system

An antenna control method applied to an antenna system, the control method comprising:

• loading an initial transmission and reception direction data set;
• receiving a plurality of signal strength data sets from a plurality of satellites through an array antenna based on the initial transmission and reception direction data set;
• establishing a candidate list from the signal strength data sets by using a minimum strength threshold;
• selecting one of the satellites that has a largest one of the signal strength data sets from the candidate list to define as a target object;
• when the signal strength data set of the target object is less than a predetermined strength threshold, switching to another one of the satellites from the candidate list as the target object;
• when the signal strength data set of the target object is greater than the predetermined strength threshold, dividing a plurality of antennas of the array antenna into a plurality of operational sub-arrays, and obtaining a plurality of baseband signal data sets of the target object respectively through the operational sub-arrays;
• inputting each of the baseband signal data sets into a subspace tracking method to obtain a principal eigenvector data set and a principal eigenvalue data set;
• inputting the principal eigenvector data set and the principal eigenvalue data set into an Estimation of Signal Parameters via Rotational Invariance Techniques (ESPRIT) to obtain a Direction of Arrival (DOA) data set of the target object;
• and
• adjusting a beam based on the DOA data set to track the target object.

An antenna system, comprising:

• an array antenna configured to receive from a plurality of satellites to obtain a plurality of signal strength data sets;
• a dynamic adjustment module connected to the array antenna, wherein the dynamic adjustment module is configured to control the array antenna to face one of the satellites based on an initial transmission and reception direction data set and a Direction of Arrival (DOA) data set;
• a tracking module connected to the array antenna and the dynamic adjustment module, wherein, when the dynamic adjustment module loads the initial transmission and reception direction data set, the tracking module is configured to establish a candidate list from the signal strength data sets by using a minimum strength threshold and to select one of the satellites that has a largest one of the signal strength data sets from the candidate list to define as a target object;
• wherein, when the tracking module detects that the signal strength data set of the target object is less than a predetermined strength threshold, the tracking module switches to another one of the satellites from the candidate list as the target object;
• and wherein, when the tracking module detects that the signal strength data set of the target object is greater than the predetermined strength threshold, the tracking module outputs a computation command;
• a computation module connected to the array antenna, the tracking module, and the dynamic adjustment module, wherein, when the computation module receives the computation command, the computation module obtains a baseband signal data set of the target object by the array antenna and inputs the baseband signal data set into a subspace tracking method to obtain a principal eigenvector data set and a principal eigenvalue data set;
• wherein the computation module inputs the principal eigenvector data set and the principal eigenvalue data set into an Estimation of Signal Parameters via Rotational Invariance Techniques (ESPRIT) to obtain a Direction of Arrival (DOA) data set of the target object;
• and wherein the computation module replaces the initial transmission and reception direction data set with the DOA data set, so that the dynamic adjustment module controls the array antenna to face the target object based on the DOA data set.

An antenna system, comprising:

• an array antenna configured to receive from a plurality of satellites to obtain a plurality of signal strength data sets, wherein the array antenna includes a plurality of operational sub-arrays, and each of the operational sub-arrays has a plurality of antennas;
• a dynamic adjustment module connected to the array antenna, wherein the dynamic adjustment module is configured to control the array antenna to face one of the satellites based on an initial transmission and reception direction data set and a Direction of Arrival (DOA) data set;
• a tracking module connected to the array antenna and the dynamic adjustment module, wherein, when the dynamic adjustment module loads the initial transmission and reception direction data set, the tracking module is configured to establish a candidate list from the signal strength data sets by using a minimum strength threshold and to select one of the satellites that has a largest one of the signal strength data sets from the candidate list to define as a target object;
• wherein, when the tracking module detects that the signal strength data set of the target object is less than a predetermined strength threshold, the tracking module switches to another one of the satellites from the candidate list as the target object;
• and wherein, when the tracking module detects that the signal strength data set of the target object is greater than the predetermined strength threshold, the tracking module outputs a computation command;
• a computation module connected to the array antenna, the tracking module, and the dynamic adjustment module, wherein, when the computation module receives the computation command, the computation module obtains a plurality of baseband signal data sets of the target object respectively using the operational sub-arrays and inputs the baseband signal data sets into a subspace tracking method to respectively obtain a principal eigenvector data set and a principal eigenvalue data set;
• wherein the computation module inputs the principal eigenvector data set and the principal eigenvalue data set into an Estimation of Signal Parameters via Rotational Invariance Techniques (ESPRIT) to obtain a Direction of Arrival (DOA) data set of the target object;
• and wherein the computation module replaces the initial transmission and reception direction data set with the DOA data set, so that the dynamic adjustment module controls the array antenna to face the target object based on the DOA data set.