Jefferson IP Law, LLP
Carrier to interference and noise ratio (CINR) estimating method and device using preamble in orthogonal frequency division multiplexing (OFDM)
A device and a method for estimating a Carrier to Interference-plus-Noise Ratio (CINR) in an Orthogonal Frequency Division Multiplexing (OFDM) system are provided. The CINR estimating method includes receiving a preamble symbol and transmitting subcarrier transmitted from a base station, calculating an interference power and noise power using the preamble symbol and transmitting subcarrier, calculating a receive power used for the base station to transmit a preamble and data symbol, estimating a preamble CINR value using an interference power, a noise power, and a receive power, calculating the noise power from a subcarrier not transmitting a preamble, and calculating an average CINR of data subcarriers using the preamble CINR value and the noise power. Accordingly, a precise CINR can be estimated using a preamble when the preamble power is amplified in comparison with the data symbol power.
Samsung Electronics Co., Ltd Hanaro Telecom, Inc. Electronics and Telecommunications Research Institute SK Telecom Co., Ltd KT Corporation
H H
H04B H04L
inventional inventional
Yu-Ro Dong-Seung
Lee Kwon