Patent ID: 8514737
Filing Date: 2013-08-20
Classification: H04B,H04L

Abstract:
1. A method for estimating a Carrier-to-Noise Ratio (CNR) at a Base Station (BS) in a wireless access system, the method comprising: converting a preamble signal received from at least one neighbor BS to a frequency response of a preamble sequence and Inverse Fast Fourier Transform (IFFT)-processing the preamble signal; dividing an estimation period of the IFFT-processed preamble signal, corresponding to a Fast Fourier Transform (FFT) size, into a predetermined number of blocks; accumulating carrier power values during a predetermined number of frames for each of the blocks; calculating average carrier power values and determining an average of timing offsets of the frames corresponding to a position of a block having a maximum average carrier value as a timing offset of the preamble signal; calculating a carrier power value of the preamble signal using the timing offset; and estimating a CNR of the preamble signal using the carrier power value.