A Consideration on Noise Variance Estimation for Direct Blind Equalization with OFDM Environment

We propose Direct Blind Equalization using estimated noise variance in Orthogonal Frequency Division Multiplexing(OFDM) environment. There is Direct Equalization for blind signals processing environment as one of conventional methods [1]. It is known that the conventional method is high equalization precision even in the case of observed signals with noisy. However, the conventional method has the problem that there is low equalization precision when the noise variance of observed signals is unknown. To solve the problem low equalization precision, we describe the estimation of noise variance for Direct Blind Equalization with OFDM environment. The advantages of proposed method are able to estimate noise variance in Blind Signal Processing environment. The performance of proposed method is shown via computer simulations.