Apparatus and method for transmitting and receiving data in a mobile communication system using an array antenna
First Claim
1. A method of transmitting data by dividing the data into sub-data streams in a mobile communication system having a multiple array antenna, the method comprising the steps of:
- transmitting pilot channels through a transmission antenna while aligning the pilot channels orthogonally to each other;
receiving feedback information related to the pilot channels from a mobile station capable of receiving the data;
dividing the data to be transmitted into the sub-data streams using the feedback information;
determining a coding rate and a transmit power for the sub-data streams;
converting the sub-data streams into symbol arrays to be transmitted according to the coding rate and the transmit power; and
transmitting data by converting the data into fixed beams.
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Accused Products
Abstract
An apparatus and a method for transmitting and receiving data in a mobile communication system including an array antenna. The method includes the steps of transmitting pilot channels through a transmission antenna while aligning the pilot channels orthogonally to each other, receiving feedback information related to the pilot channels from a mobile station capable of receiving the data, dividing the data to be transmitted into sub-data streams by using the feedback information, and determining a coding rate and a transmit power for the sub-data streams, and converting the sub-data streams into symbol arrays to be transmitted according to the coding rate and the transmit power and transmitting data by converting the data into fixed beams.
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Citations
23 Claims
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1. A method of transmitting data by dividing the data into sub-data streams in a mobile communication system having a multiple array antenna, the method comprising the steps of:
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transmitting pilot channels through a transmission antenna while aligning the pilot channels orthogonally to each other;
receiving feedback information related to the pilot channels from a mobile station capable of receiving the data;
dividing the data to be transmitted into the sub-data streams using the feedback information;
determining a coding rate and a transmit power for the sub-data streams;
converting the sub-data streams into symbol arrays to be transmitted according to the coding rate and the transmit power; and
transmitting data by converting the data into fixed beams. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus for transmitting data by dividing the data into sub-data streams in a mobile communication system having a multiple array antenna, the apparatus comprising:
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a controller for receiving feedback information related to the pilot channels from a mobile station capable of receiving the data, determining a number and a size of the sub-data streams of the data to be transmitted using the feedback information, and determining and outputting a coding rate and a transmit power for the sub-data streams;
a demultiplexer for demultiplexing the data according to information related to the number and the size of the sub-data streams transmitted from the controller, and for outputting the data to the mobile station;
a data processing unit for receiving the coding rate from the controller, converting the sub-data streams output from the demultiplexer into symbols to be transmitted, and outputting the symbols;
a power allocating unit for receiving power allocation information from the controller, allocating power to each symbol transmitted thereto from the data processing unit, and outputting the symbols; and
a fixed beam former for performing a beam-forming process in order to convert the symbols output from the power allocating unit into predetermined beams. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A method of receiving data, that is transmitted after being divided into sub-data streams, in a mobile communication system having a multiple array antenna, the method comprising the steps of:
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estimating a state of each of sub-channels established by a multiple antenna of a transmitter;
feeding back information related to the state each of the sub-channels;
determining a decoding order of data streams received in each of the sub-channels;
sequentially decoding the data streams according to the decoding order;
removing interference of decoded data streams to the data streams being decoded; and
multiplexing the sub-data streams into a main data stream when a decoding process for the data streams has been completed. - View Dependent Claims (17, 18)
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19. An apparatus for receiving data, which is transmitted after being divided into sub-data streams, in a mobile communication system having a multiple array antenna, the apparatus comprising:
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a fading estimator for estimating a fading of each of sub-channels established by a multiple antenna of a transmitter;
a channel state estimator for creating channel state information for each sub-data stream and feeding back the channel state information by using a signal output from the fading estimator;
a linear coupler for outputting data by linearly combining sub-data streams received through the multiple array antenna;
a data processing unit for decoding sub-data streams, which are output from the linear coupler and in which interference is not removed;
an interference remover for removing interference caused by decoded information based on information output from the data processing unit and the fading estimator; and
a data processing unit for decoding sub-data streams output from the interference remover. - View Dependent Claims (20, 21, 22, 23)
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Specification