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METHOD AND APPARATUS FOR CHANNEL QUALITY ESTIMATION AND LINK ADAPTATION IN THE ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING WIRELESS COMMUNICATIONS SYSTEMS
METHOD AND APPARATUS FOR CHANNEL QUALITY ESTIMATION AND LINK ADAPTATION IN THE ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING WIRELESS COMMUNICATIONS SYSTEMS
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机译:正交频分复用无线通信系统中信道质量估计和链路自适应的方法和装置
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摘要
A method for channel quality estimation and link adaptation for an OFDM wireless communication system includes: (a) estimating a channel gain and a noise power, and measuring an SNR in consideration of the estimated channel gain and noise power; (b) calculating a correlation value between an externally received preamble signal and a known preamble signal, and estimating a delay spread; (c) measuring the quality status of a channel in consideration of the measured SNR and the estimated delay spread; and (d) determining parameters including transmit power, data modulation mode, and data rate, according to the measured quality status of the channel, and performing a link adaptation using a protocol for acknowledging a normal signal transmission as well as using the SNR and the delay spread.
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