Information processing apparatus and information processing method
Provided is an information processing apparatus intended to address problems in which positioning devices simply equipped with a plurality of antennas will fail to perform the carrier positioning. The information processing apparatus includes a receiving unit and a processing unit. The receiving unit has a plurality of antennas located at second positions (Pa, Pb) and capable of receiving a carrier wave transmitted from a satellite. The processing unit performs positioning of a set first position (Po) on the basis of second phase information obtained by correcting first phase information of carrier waves respectively received by the plurality of the antennas.
1. An information processing apparatus comprising:
a receiving unit including a plurality of antennas each capable of receiving a carrier wave transmitted from a satellite; and
a processing unit configured to:
correct each piece of first phase information of carrier waves respectively received by the plurality of antennas as if the carrier waves are received at a first position; and
perform positioning of the first position on a basis of a plurality of pieces of second phase information in which respective pieces of the first phase information of the carrier waves are corrected.
2. The information processing apparatus according to claim 1 ,
wherein, in a case of the correction of the first phase information of a carrier wave received by one antenna among the plurality of antennas,
the processing unit is further configured to correct the first phase information on a basis of a first distance between the first position and a second position corresponding to the one antenna and a positional relationship between the first position, the second position, and the satellite that has transmitted the received carrier wave.
3. The information processing apparatus according to claim 2 ,
wherein the processing unit is further configured to obtain a path difference that is a difference between a second distance between the satellite that has transmitted the received carrier wave and the first position, and a third distance between the satellite that has transmitted the received carrier wave and the second position, on a basis of the first distance and the positional relationship, and
correct the first phase information further on a basis of the obtained path difference.
4. The information processing apparatus according to claim 2 ,
wherein the processing unit is further configured to estimate the positional relationship on a basis of an attitude of the information processing apparatus, a position of the information processing apparatus, and a position of the satellite that has transmitted the received carrier wave.
5. The information processing apparatus according to claim 1 ,
wherein the processing unit is further configured to perform positioning of the first position by execution of a real-time kinematic operation using the plurality of pieces of the second phase information corresponding to the carrier waves respectively received by the plurality of antennas.
6. The information processing apparatus according to claim 1 ,
wherein, in a case where a plurality of pieces of the first phase information of the carrier wave transmitted from the same satellite is acquired,
the processing unit is further configured to perform positioning of the first position on a basis of one piece of the first phase information selected from the plurality of pieces of the acquired first phase information or third phase information generated from the plurality of pieces of the acquired first phase information.
7. The information processing apparatus according to claim 6 ,
wherein, in a case of the selection of the one piece of the first phase information from the plurality of pieces of the acquired first phase information,
the processing unit is further configured to select the one piece of the first phase information on a basis of a power ratio between a received carrier wave and noise.
8. The information processing apparatus according to claim 6 ,
wherein, in a case of the generation of the third phase information,
the processing unit is further configured to generate the third phase information by execution of averaging processing on the plurality of pieces of the acquired first phase information.
9. The information processing apparatus according to claim 8 ,
wherein the processing unit is further configured to perform the averaging processing by application of weight based on a power ratio between a received carrier wave and noise.
10. The information processing apparatus according to claim 6 ,
wherein the processing unit is further configured to perform processing to select the one piece of the first phase information from the plurality of pieces of the acquired first phase information or processing to generate the third phase information on a basis of a power ratio between a received carrier wave and noise.
11. The information processing apparatus according to claim 1 ,
wherein the processing unit is further configured to correct a characteristic of an antenna of the plurality of the antennas on a basis of an attitude of the antenna.
12. The information processing apparatus according to claim 11 ,
wherein the processing unit is further configured to correct phase center variation (PCV) as the characteristic.
13. The information processing apparatus according to claim 12 ,
wherein the processing unit is further configured to calculate an incident angle of the carrier wave to the antenna and the incident angle corresponding to the attitude of the antenna, and
correct the PCV by a correction value corresponding to the calculated incident angle.
14. The information processing apparatus according to claim 11 ,
wherein the processing unit is further configured to correct an offset of the antenna as the characteristic.
15. The information processing apparatus according to claim 14 ,
wherein the processing unit is further configured to calculate an incident angle of the carrier wave to the antenna and the incident angle corresponding to the attitude of the antenna, and
correct the offset using a correction value corresponding to the calculated incident angle.
16. The information processing apparatus according to claim 1 ,
wherein the information processing apparatus is a wearable device capable of being used while being worn on a human body.
17. An information processing apparatus comprising:
a processing unit configured to:
correct each piece of first phase information of carrier waves respectively received by a plurality of antennas as if the carrier waves are received at a first position, wherein the plurality of antennas is capable to receive a carrier wave transmitted from a satellite; and
perform positioning of the first position on a basis of a plurality of pieces of second phase information in which respective pieces of the first phase information of the carrier waves are corrected.
18. An information processing method that is executed by an information processing apparatus, the method comprising:
correcting each piece of first phase information of carrier waves respectively received by a plurality of antennas as if the carrier waves are received at a first position, wherein the plurality of antennas is capable to receive a carrier wave transmitted from a satellite; and
performing positioning of the first position on a basis of a plurality of pieces of second phase information in which respective pieces of the first phase information of the carrier waves are corrected.