Positioning using a line-of-sight signal
A method, apparatus and computer readable medium are provided for determining position information of a receiver device. The method includes determining a plurality of beams and combining received multipath signals from the plurality of the beams. The received multipath signals are generated by a transmitter device. The method also includes determining, based at least in part on the combined received multipath signals, a line of sight signal and determining, based at least in part on the line of sight signal, position information of a receiver device.
1 . An apparatus comprising:
at least one processor; and
at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to perform:
determining a plurality of beams;
combining received multipath signals from the plurality of the beams, the received multipath signals generated by a transmitter device;
determining, based at least in part on the combined received multipath signals, a line of sight signal by employing a non-line-of-sight channel detector; and
determining, based at least in part on the line of sight signal, position information of a receiver device.
2 . An apparatus as claimed in claim 1 , wherein combining the received multipath signals from the plurality of the beams comprises determining a superimposed channel response for the plurality of beams.
3 . An apparatus as claimed in claim 1 , wherein determining the line of sight signal comprises assuming that delays associated with the received multipath signals are on a grid having a resolution.
4 . An apparatus as claimed in claim 3 , wherein the resolution is less than a sampling time.
5 . An apparatus as claimed in claim 1 , wherein determining the line of sight signal comprises determining a first received multipath signal having energy above a threshold.
6 . An electronic device comprising the apparatus as claimed in claim 1 and a plurality of antennas.
7 . An apparatus comprising:
at least one processor; and
at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to perform:
determining a plurality of beams;
determining a number of beams from which received multipath signals from the plurality of the beams are to be combined, wherein the received multipath signals are generated by a transmitter device;
combining the received multipath signals based on the number of beams;
determining, based at least in part on the combined received multipath signals, a line of sight signal; and
determining, based at least in part on the line of sight signal, position information of a receiver device.
8 . An apparatus as claimed in claim 7 , wherein determining the number of beams is based, at least in part, on one or more of:
a beam width of a main beam lobe and first side lobes;
a channel spread in an angle domain for multipath signals above a power threshold; or
the channel spread in the angle domain for multipath signals below the power threshold.
9 . An apparatus as claimed in claim 7 , wherein combining the received multipath signals from the plurality of the beams comprises determining a superimposed channel response for the plurality of beams.
10 . An apparatus as claimed in claim 7 , wherein determining the line of sight signal comprises assuming that delays associated with the received multipath signals are on a grid having a resolution.
11 . An apparatus as claimed in claim 7 , wherein the resolution is less than a sampling time.
12 . An apparatus as claimed in claim 7 , wherein determining the line of sight signal comprises determining a first received multipath signal having energy above a threshold.
13 . A non-transitory computer readable medium comprising program instructions stored thereon for causing an apparatus to perform:
determining a plurality of beams;
combining received multipath signals from the plurality of the beams, the received multipath signals generated by a transmitter device;
determining, based at least in part on the combined received multipath signals, a line of sight signal by employing a non-line-of-sight channel detector; and
determining, based at least in part on the line of sight signal, position information of a receiver device.
14 . A non-transitory computer readable medium as claimed in claim 13 , wherein combining the received multipath signals from the plurality of the beams comprises determining a superimposed channel response for the plurality of the beams.
15 . A non-transitory computer readable medium as claimed in claim 13 , wherein determining the line of sight signal comprises assuming that delays associated with the received multipath signals are on a grid having a resolution.
16 . A non-transitory computer readable medium as claimed in claim 13 , wherein the program instructions further cause the apparatus to determine a number of beams from which received multipath signals from the plurality of the beams are to be combined, and wherein determining the number of beams is based, at least in part, on one or more of:
a beam width of a main beam lobe and first side lobes;
a channel spread in an angle domain for multipath signals above a power threshold; or
the channel spread in the angle domain for multipath signals below the power threshold.