Method and apparatus for estimating channel using phase compensation in wireless communication system
First Claim
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1. A method of estimating a channel in a wireless communication system, the method comprising:
- obtaining a channel impulse response from a pilot signal included in a received signal;
estimating an index of a main signal path with a maximum peak power value for the channel impulse response in an effective window section, which is set based on the channel impulse response;
determining a timing offset with the maximum peak power value for the channel impulse response;
performing a phase compensation using the determined timing offset, wherein performing the phase compensation further comprises performing the phase compensation in a frequency domain using the index of the main signal path with the maximum peak power value;
estimating a channel to which the compensated phase was applied; and
outputting a channel estimation value in which the channel estimate with the compensated phase is restored to the original phase.
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Abstract
Method of estimating a channel in a wireless communication system by obtaining a channel impulse response from a pilot signal included in a received signal; estimating a timing offset with a maximum peak power value for the channel impulse response; and performing a phase compensation using the estimated timing offset and estimating a channel which is applied with the compensated phase.
19 Citations
14 Claims
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1. A method of estimating a channel in a wireless communication system, the method comprising:
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obtaining a channel impulse response from a pilot signal included in a received signal; estimating an index of a main signal path with a maximum peak power value for the channel impulse response in an effective window section, which is set based on the channel impulse response; determining a timing offset with the maximum peak power value for the channel impulse response; performing a phase compensation using the determined timing offset, wherein performing the phase compensation further comprises performing the phase compensation in a frequency domain using the index of the main signal path with the maximum peak power value; estimating a channel to which the compensated phase was applied; and outputting a channel estimation value in which the channel estimate with the compensated phase is restored to the original phase. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus for estimating a channel in a wireless communication system, the apparatus comprising:
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an Inverse Discrete Fourier Transform (IDFT) unit which obtains a channel impulse response from a pilot signal which is included in a received signal; a timing offset estimator which estimates an index of a main signal path with a maximum peak power value for the channel impulse response in an effective window section, which is set based on the channel impulse response, and determines a timing offset corresponding to the estimated index of the main signal path; a timing offset compensator which performs a phase compensation using the estimated timing offset and performs the phase compensation in a frequency domain using the index of the main signal path with the maximum peak power value; a moving averaging unit which performs a channel estimation to which the compensated phase was applied; and a timing offset decompensator which outputs a channel estimation value in which the channel estimate with the compensated phase is restored to the original phase. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification