基于LSTM神经网络的QPSK智能接收机设计  

Design of QPSK Intelligent Receiver Based on LSTM Neural Network

作　　者：朱力 韩会梅 翟文超 ZHU Li;HAN Huimei;ZHAI Wenchao(College of Information Engineering,Zhejiang University of Technology,Hangzhou 310023,China;College of Information Engineering,China Jiliang University,Hangzhou 310018,China)

机构地区：[1]浙江工业大学信息工程学院,杭州310023 [2]中国计量大学信息工程学院,杭州310018

出　　处：《计算机科学》2023年第S02期778-782,共5页Computer Science

基　　金：国家自然科学基金(62001419)。

摘　　要：针对正交相移键控(Quadrature Phase Shift Keying,QPSK)接收机检测信号准确率低以及复杂度高的问题,提出了一种基于长短期记忆(Long Short-term Memory,LSTM)神经网络的QPSK智能接收机设计方案。该方案中的神经网络模型由LSTM和全连接层构成,其利用LSTM提取接收信号的时间相关性,具有较低复杂度。仿真实验结果表明,在加性高斯白噪声、同相和正交(Inphase and Quadrature,IQ)失衡、频率偏差信道因素影响下,与现有QPSK接收机相比,所提出的QPSK智能接收机显著提高了检测性能。To solve the problem of low detection accuracy and high complexity of quadrature phase shift keying(QPSK)receiver,this paper proposes a QPSK intelligent receiver based on long short-term memory(LSTM)neural network.The proposed intelligent receiver consists of LSTM and fully connected layers,which employs the LSTM to capture the temporal correlation of the received signal.Furthermore,the proposed intelligent receiver has low complexity.Simulation results show that,compared with the existing QPSK receivers,the proposed QPSK intelligent receiver significantly improves detection performance in the scenarios of additive Gaussian white noise,inphase quadrature imbalance and frequency deviation channel.

关 键 词：深度学习 长短期记忆神经网络 智能接收机 QPSK调制 

分 类 号：TN919.3[电子电信—通信与信息系统]