Method and apparatus for improved estimation of selective channels in an OFDMA system with dedicated pilot tones
First Claim
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1. A method of channel estimation for a wireless communication system, comprising:
- using an antenna for receiving dedicated pilot symbols transmitted over at least one time-frequency region for at least one user; and
estimating channel parameters for the at least one time-frequency region based on the received dedicated pilot symbols by;
computing projection terms of the received dedicated pilot symbols on dimensions occupied by a signal of the at least one user;
estimating variations in at least one of time or frequency domain of a channel for each of the at least one user using the computed projection terms;
correcting the computed projection terms using the estimated variations; and
estimating the channel parameters based on the corrected projection terms.
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Abstract
The present disclosure provides a method and apparatus of channel estimation for a wireless communication system. Dedicated pilot symbols transmitted over at least one time-frequency region for at least one user are received. Channel parameters are estimated for the at least one time-frequency region based on the received dedicated pilot symbols.
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Citations
28 Claims
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1. A method of channel estimation for a wireless communication system, comprising:
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using an antenna for receiving dedicated pilot symbols transmitted over at least one time-frequency region for at least one user; and estimating channel parameters for the at least one time-frequency region based on the received dedicated pilot symbols by; computing projection terms of the received dedicated pilot symbols on dimensions occupied by a signal of the at least one user; estimating variations in at least one of time or frequency domain of a channel for each of the at least one user using the computed projection terms; correcting the computed projection terms using the estimated variations; and estimating the channel parameters based on the corrected projection terms. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus of channel estimation for a wireless communication system, comprising:
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means for receiving dedicated pilot symbols transmitted over at least one time-frequency region for at least one user; and means for estimating channel parameters for the at least one time-frequency region based on the received dedicated pilot symbols, wherein the means for estimating channel parameters comprises; means for computing projection terms of the received dedicated pilot symbols on dimensions occupied by a signal of the at least one user; means for estimating variations in at least one of time or frequency domain of a channel for each of the at least one user using the computed projection terms; means for correcting the computed projection terms using the estimated variations; and means for estimating the channel parameters based on the corrected projection terms. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. An apparatus of channel estimation for a wireless communication system, comprising:
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at least one processor configured to receive dedicated pilot symbols transmitted over at least one time-frequency region for at least one user, and estimate channel parameters for the at least one time-frequency region based on the received dedicated pilot symbols by; a) computing projection terms of the received dedicated pilot symbols on dimensions occupied by a signal of the at least one user, b) estimating variations in at least one of time or frequency domain of a channel for each of the at least one user using the computed projection terms, c) correcting the computed projection terms using the estimated variations, and d) estimating the channel parameters based on the corrected projection terms. a memory coupled to the at least one processor. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. A non-transitory computer-readable medium storing a computer program, wherein execution of the computer program is for:
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causing at least one computer to receive dedicated pilot symbols transmitted over at least one time-frequency region for at least one user; and causing the at least one computer to estimate channel parameters for the at least one time-frequency region based on the received dedicated pilot symbols by; a) causing the at least one computer to compute projection terms of the received dedicated pilot symbols on dimensions occupied by a signal of the at least one user; b) causing the at least one computer to estimate variations in at least one of time or frequency domain of a channel for each of the at least one user using the computed projection terms; c) causing the at least one computer to correct the computed projection terms using the estimated variations; and d) causing the at least one computer to estimate the channel parameters based on the corrected projection terms. - View Dependent Claims (23, 24, 25, 26, 27, 28)
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Specification