论文标题
基于图形的符号检测的神经增强
Neural Enhancement of Factor Graph-based Symbol Detection
论文作者
论文摘要
我们研究了因子图框架在线性符号间干扰通道上的符号检测的应用。循环因子图具有产生低复杂性符号检测器的潜力，但是如果应用无处不在的总和产物算法，则是次优的。在本文中，我们介绍并评估策略，以通过神经增强来提高基于周期性因子图的符号检测算法的性能。特别是，我们将神经信念传播作为抵消因子图内周期效应的有效方法。我们进一步提出了通道输出的线性预处理器的应用和优化。通过修改观察模型，预处理可以有效地改变基本因子图，从而显着提高检测性能并降低复杂性。
We study the application of the factor graph framework for symbol detection on linear inter-symbol interference channels. Cyclic factor graphs have the potential to yield low-complexity symbol detectors, but are suboptimal if the ubiquitous sum-product algorithm is applied. In this paper, we present and evaluate strategies to improve the performance of cyclic factor graph-based symbol detection algorithms by means of neural enhancement. In particular, we apply neural belief propagation as an effective way to counteract the effect of cycles within the factor graph. We further propose the application and optimization of a linear preprocessor of the channel output. By modifying the observation model, the preprocessing can effectively change the underlying factor graph, thereby significantly improving the detection performance as well as reducing the complexity.
