Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2006-10-03
2006-10-03
Vuong, Quochien B. (Department: 2618)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S067110, C455S464000, C370S208000, C370S210000
Reexamination Certificate
active
07116981
ABSTRACT:
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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Ahn Jae-Young
Jeon Tae-hyun
Lee Woo-Yong
Blakely & Sokoloff, Taylor & Zafman
Electronics and Telecommunications Research Institute
Vuong Quochien B.
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