Method and apparatus for determining an angle of arrival of a transmitted signal in a communication system
First Claim
1. A method of determining an angle of arrival in a transmitted signal in a communication system, the method comprising the steps of:
- receiving a transmitted signal at a main sector and an adjacent sector of the communication system;
determining a first parameter suitable for location determination from the signal received at the main sector;
using the first parameter to determine a second parameter suitable for location determination from the signal received at the adjacent sector to reduce an amplitude estimation error; and
using the second parameter to determine the angle of arrival.
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Accused Products
Abstract
A method and apparatus for determining an angle-of-arrival (AOA) of the prompt ray at an adjacent sector of a base station is provided. High precision parameter estimates from a main sector location searcher (501) are provided to an adjacent sector location searcher (502) in order to enhance the accuracy of the parameter estimates generated by the adjacent sector location searcher (502). Main sector time-delay and phase estimates may be used as estimates for the adjacent sector time-delay, and phase estimates to increase the coherent averaging window within the adjacent sector location searcher, and hence to increase the accuracy of the amplitude estimation from the adjacent sector location searcher.
50 Citations
13 Claims
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1. A method of determining an angle of arrival in a transmitted signal in a communication system, the method comprising the steps of:
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receiving a transmitted signal at a main sector and an adjacent sector of the communication system;
determining a first parameter suitable for location determination from the signal received at the main sector;
using the first parameter to determine a second parameter suitable for location determination from the signal received at the adjacent sector to reduce an amplitude estimation error; and
using the second parameter to determine the angle of arrival. - View Dependent Claims (2, 3, 4, 5)
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6. An apparatus for determining an angle-of-arrival of a signal transmitted in a communication system comprising:
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a main sector having a main sector receiver coupled to a main sector antenna and a main sector location searcher coupled to the main sector receiver;
an adjacent sector having an adjacent sector receiver coupled to an adjacent sector antenna and an adjacent sector location searcher coupled to the adjacent sector receiver; and
wherein the main sector location searcher is coupled to the adjacent sector location searcher for communicating at least one parameter suitable for use in location determination from the main sector location searcher to the adjacent sector location searcher, and wherein the adjacent sector location searcher is operable to use the at least one parameter for determining the angle-of-arrival and wherein the at least one parameter comprises one of a time-delay estimate and a channel phase estimate. - View Dependent Claims (7, 8)
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9. A computer program embodied on a computer readable medium for determining an angle of arrival of a signal transmitted in a communication system comprising:
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a first routine to determine a first parameter from a signal received at a main sector antenna of the communication system;
a second routine using the first parameter to determine a second parameter from the signal as received at an adjacent sector antenna of the communication system, wherein the second parameter comprises an amplitude estimate; and
a third routine using the second parameter to determine the angle of arrival of the signal. - View Dependent Claims (10, 11, 12, 13)
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Specification