Methods and apparatus for determining a direction of arrival in a wireless communication system
First Claim
1. A method for determining a direction of arrival (DOA) of a Radio Frequency (RF) signal transmitted by a remote unit in a wireless communication system, comprising:
- receiving said RF signal with a plurality of antennas of an antenna array;
determining a preliminary DOA for said RF signal received with said plurality of antennas of said antenna array;
selecting a coefficient for said plurality of antennas of said antenna array based at least in part upon said preliminary DOA;
modifying said RF signal with said coefficient for said plurality of antennas of said antenna array to generate a modified RF signal; and
determining said DOA of said RF signal transmitted by said remote unit in said wireless communication system with said modified RF signal.
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Accused Products
Abstract
Methods and apparatus are provided for determining a direction of arrival (DOA) (46) of a Radio Frequency (RF) signal (32) transmitted by a remote unit (22) in a wireless communication system (20). The methods comprise receiving the RF signal (32) with multiple antennas (34,36,38,40,42,44) of the antenna array (26) and determining a preliminary direction of arrival (DOA) (78) for the RF signal (32) received with the multiple of antennas (34,36,38,40,42,44) of the antenna array (26). The methods also comprise selecting a coefficient (80) for the antenna array (26) based at least in part upon the preliminary DOA 978), modifying the RF signal (32) with the coefficient (80) to generate a modified RF signal (82), and determining the DOA (46) of the RF signal (32) with the modified RF signal (82).
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Citations
26 Claims
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1. A method for determining a direction of arrival (DOA) of a Radio Frequency (RF) signal transmitted by a remote unit in a wireless communication system, comprising:
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receiving said RF signal with a plurality of antennas of an antenna array;
determining a preliminary DOA for said RF signal received with said plurality of antennas of said antenna array;
selecting a coefficient for said plurality of antennas of said antenna array based at least in part upon said preliminary DOA;
modifying said RF signal with said coefficient for said plurality of antennas of said antenna array to generate a modified RF signal; and
determining said DOA of said RF signal transmitted by said remote unit in said wireless communication system with said modified RF signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An apparatus for determining a direction of arrival (DOA) of a Radio Frequency (RF) signal transmitted by a remote unit in a wireless communication system, comprising:
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a plurality of antennas of an antenna array configured to receive said RF signal;
a first DOA determinator configured to determine a preliminary DOA for said RF signal received with said plurality of antennas of said antenna array;
a coefficient selector configured to select a coefficient for said plurality of antennas of said antenna array based at least in part upon said preliminary DOA;
a signal modifier configured to modify said RF signal with said coefficient for said plurality of antennas of said antenna array to generate a modified RF signal; and
a second DOA determinator configured to determine said DOA of said RF signal transmitted by said remote unit in said wireless communication system with said modified RF signal. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification