Method and apparatus for estimating communication channel in mobile communication system
First Claim
1. A method of receiving a signal by a receiver in a mobile communication system, the method comprising:
- receiving a reference signal and a data signal from a transmitter;
estimating first channel information based on the received reference signal;
decoding the data signal based on the first channel information;
identifying whether an error is detected in a data symbol included in the decoded data signal;
estimating second channel information based on the data symbol, if the error is not detected at the data symbol; and
estimating channel information of a resource area corresponding to the data symbol using another channel information estimated in a resource area adjacent to the resource area corresponding to the data symbol on time and frequency domains, if the error is detected at the data symbol.
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Abstract
A method of receiving a signal by a receiver in a mobile communication system is provided. The method includes: receiving a reference signal from a transmitter; determining first channel information based on the received reference signal; receiving a data signal based on the first channel information; and determining second channel information based on the received data signal and the first channel information. Iterative channel estimation is performed to reduce channel estimation errors by determining errors of signals received from a turbo decoding unit and using symbol information as pilots even in subcarriers where the pilot signals are not transmitted, and to increase the accuracy of LLR calculation through an iteration process such as a detection and decoding process in comparison with the conventional technology, thereby increasing the reception performance of the turbo decoding unit and improving communication efficiency.
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Citations
18 Claims
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1. A method of receiving a signal by a receiver in a mobile communication system, the method comprising:
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receiving a reference signal and a data signal from a transmitter; estimating first channel information based on the received reference signal; decoding the data signal based on the first channel information; identifying whether an error is detected in a data symbol included in the decoded data signal; estimating second channel information based on the data symbol, if the error is not detected at the data symbol; and estimating channel information of a resource area corresponding to the data symbol using another channel information estimated in a resource area adjacent to the resource area corresponding to the data symbol on time and frequency domains, if the error is detected at the data symbol. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus of a mobile communication system, the apparatus comprising:
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a transmitter configured to receive a reference signal and a data signal; and a controller configured to; estimate first channel information based on the received reference signal; decode the data signal based on the first channel information; identify whether an error is detected in a data symbol included in the decoded data signal; estimate second channel information based on the data symbol if the error is not detected at the data symbol; and estimate channel information of a resource area corresponding to the data symbol using another channel information estimated in a resource area adjacent to the resource area corresponding to the data symbol on time and frequency domains, if the error is detected at the data symbol. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification