According to that the traditional blind SNR estimation utilized the additive white Gaussian noise for orthogonal frequency division multiplexing (OFDM) system in multi-path channel conditions, a kind of method based on the impulsive noise environment SNR blind estimation was proposed. Firstly, the received OFDM signal was passed through a blanking nonlinearity element to suppress the impulsive noise at the receiver. Secondly, the channel order was roughly estimated by utilizing the cyclostationarity of autocorrelation function, and then estimated the noise average power by utilizing the characteristics that the data in cyclic prefix which was replication of part useful data. Finally, the signal average power was estimated from the last received signal power. The simulation results showed that the proposed method did not need any prior information and had better performance and lower computation complexity in multi-path channel.
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袁三燕,徐家品,赖黎. 脉冲噪声环境下信噪比的盲估计[J]. 科学技术与工程, 2013, 13(33): . Yuan San-yan, Xu Jia-Pin, Lai li. Blind SNR estimation in the impulsive noise environment[J]. Science Technology and Engineering,2013,13(33).