信噪比估计器(Signal-to-Noise Ratio Estimator,SNRE)可用于移动通信中的多个领域,例如LDPC码软译码器中就需要信道信噪比以用于计算接收码字的先验信息。该文在一种加性白高斯噪声(Additive White Gaussian Noise,AwGN)信道中在线SNRE的基础上,推出一种低复杂度的衰落信道盲信噪比估计器(Fading channel Blind SNRE,FBSNRE)。仿真结果表明FBSNRE在应用于LDPC码译码器时具有较好的性能。
SNRE (Signal-to-Noise Ration Estimator) can be used in a lot of areas in mobile communication, such as the decoder of LDPC code which need it to compute the "a priori" information of received bits. In this paper, a low complexity blind SNRE, FBSNRE (Fading channel Blind SNRE), based on the online estimator in AWGN channel, is presented. Simulation results prove that FBSNRE cam achieve excellent performance when it is applied in the decoder of LDPC code.