Apparatus and method for estimating a channel condition of a forward link in a mobile communication system
First Claim
1. A method for estimating a channel condition of a forward link by a mobile station in a mobile communication system including the mobile station and a base station for transmitting and receiving data using a plurality of subcarriers having mutual orthogonality, the method comprising the steps of:
- measuring carrier-to-interference ratio (C/I) values of the plurality of subcarriers using a signal received from the base station;
determining a subcarrier from the plurality subcarriers for transmitting feedback information in a given coherence bandwidth;
generating the feedback information of the subcarrier;
; and
transmitting the generated feedback information to the base station for estimating the channel condition of the forward link.
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Abstract
A apparatus and method for estimating a channel condition of a forward link by a mobile station in a mobile communication system including the mobile station and a base station for performing an operation of transmitting/receiving data using a plurality of subcarriers having mutual orthogonality. The method comprises measuring carrier-to-interference ratio (C/I) values of the subcarriers using a signal received from the base station; determining from the received signal a subcarrier for transmitting feedback information in a given coherence bandwidth; generating feedback information to be transmitted over the determined subcarrier; and transmitting the generated feedback information to the base station as information for estimating a channel condition of the forward link.
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Citations
47 Claims
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1. A method for estimating a channel condition of a forward link by a mobile station in a mobile communication system including the mobile station and a base station for transmitting and receiving data using a plurality of subcarriers having mutual orthogonality, the method comprising the steps of:
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measuring carrier-to-interference ratio (C/I) values of the plurality of subcarriers using a signal received from the base station;
determining a subcarrier from the plurality subcarriers for transmitting feedback information in a given coherence bandwidth;
generating the feedback information of the subcarrier;
; and
transmitting the generated feedback information to the base station for estimating the channel condition of the forward link. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for estimating a channel condition of a forward link by a mobile station in a mobile communication system including the mobile station and a base station for transmitting and receiving data using a plurality of subcarriers having mutual orthogonality, the method comprising the steps of
estimating carrier-to-interference ratio (C/I) values of the plurality of subcarriers using a signal received from the base station; -
generating feedback information using the estimated C/I values according to whether a current time slot is a time slot at which C/I values of all subcarriers in a given coherence bandwidth are transmitted; and
transmitting the generated feedback information to the base station for estimating the channel condition of the forward link. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A method for estimating a channel condition of a forward link by a mobile station in a mobile communication system including the mobile station and a base station for transmitting and receiving data using a plurality of subcarriers having mutual orthogonality, the method comprising the steps of:
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measuring carrier-to-interference ratio (C/I) values of the plurality of subcarriers using a signal received from the base station;
determining whether a current time slot of a subcarrier is a reference C/I transmission time slot;
generating the feedback information using a reference C/I value of the subcarrier, if the current time slot of the subcarrier is the reference C/I transmission time slot; and
transmitting the generated feedback information to the base station for estimating the channel condition of the forward link. - View Dependent Claims (17, 18, 19)
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20. A method for estimating a channel condition of a forward link by a base station in a mobile communication system including a mobile station and the base station for transmitting and receiving data using a plurality of subcarriers having mutual orthogonality, the method comprising the steps of:
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receiving feedback information from the mobile station over a feedback channel;
analyzing carrier-to-interference ratio (C/I) values of subcarriers in a given coherence bandwidth using the received feedback information; and
estimating the channel condition of the forward link using analyzed C/I values. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27)
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28. A method for estimating a channel condition of a forward link by a base station in a mobile communication system including a mobile station and the base station for transmitting and receiving data using a plurality of subcarriers having mutual orthogonality, the method comprising the steps of:
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determining whether a current time slot of a subcarrier is a reference C/I transmission time slot;
receiving feedback information using a reference C/I value of the subcarrier, if the current time slot of the subcarrier is the reference C/I transmission time slot; and
estimating the channel condition of the forward link using analyzed C/I values. - View Dependent Claims (29, 30, 31)
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32. An apparatus for estimating a channel condition of a forward link by a mobile station in a mobile communication system including the mobile station and a base station for transmitting and receiving data using a plurality of subcarriers having mutual orthogonality, comprising:
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a forward link channel estimator for estimating carrier-to-interference ratio (C/I) values of the subcarriers using a received signal;
a feedback information generator for and generating the feedback information of a subcarrier to be transmitted; and
a feedback channel for transmitting the generated feedback information to the base station for estimating the channel condition of the forward link. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39)
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40. An apparatus for estimating a channel condition of a forward link by a base station in a mobile communication system including a mobile station and the base station for transmitting and receiving data using a plurality of subcarriers having mutual orthogonality, comprising:
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a feedback channel receiver for receiving feedback information using carrier to interference ratio(C/I) value from the mobile station over a feedback channel; and
a feedback information analyzer for estimating C/I values of the subcarriers according to a preset condition and estimating the channel condition of the forward link. - View Dependent Claims (41, 42, 43, 44, 45, 46, 47)
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Specification