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多径效应造成的符号间干扰是大容量散射传输所遇到的首要问题。根据文献中提出的基于二阶循环统计量的直接盲均衡算法,依据最小均方误差准则,对接收到的信号进行过采样,构造了一个线性的分数间隔均衡器,并用它来均衡对流层散射信道,获得了较好的均衡效果。由于该算法不经过信道盲辨识而直接均衡信道,因此受信道阶数误差的影响较小,且该算法与传统的基于二阶矩的两步均衡算法相比,具有计算简单,精度高的特点。
Inter-symbol interference caused by multipath effects is the primary issue encountered with high-capacity scattering transmissions. According to the direct blind equalization algorithm proposed in the literature based on second-order cyclic statistics, the received signal is oversampled according to the minimum mean square error criterion, a linear fractional interval equalizer is constructed and used to equalize the tropospheric scatter channel , Get better balance effect. Because the algorithm directly equalizes the channel without channel blind identification, it is less affected by the order error of the channel. Compared with the traditional two-step-based two-step equalization algorithm, the proposed algorithm has the advantages of simple calculation and high accuracy .