基于格基约减的水下成像光MIMO预编码研究
PRECODING FOR UNDERWATER OPTICAL LIGHT MIMO SYSTEM BASED ON LATTICE REDUCTION
张依涛 1陈晓 2李燕龙 1符杰林1
作者信息
- 1. 桂林电子科技大学信息与通信学院 广西桂林 541004;桂林电子科技大学认知无线电与信息处理教育部重点实验室 广西桂林 541004
- 2. 桂林电子科技大学认知无线电与信息处理教育部重点实验室 广西桂林 541004;桂林电子科技大学艺术与设计学院 广西桂林 541004
- 折叠
摘要
针对水下成像光MIMO系统子信道间相关性强的问题,提出一种基于格基约减最小均方误差预编码算法.通过将接收端的最小均方误差检测操作转化为发送端的预编码,解决了传统光MIMO线性检测算法对噪声的放大问题,并利用格基约减后正交性更好的信道矩阵求解预编码阵,降低了光MIMO系统子信道间的相关性.仿真结果表明,在误码率为10-4数量级时,与传统光MIMO检测算法相比,采用格基约减预编码算法的系统获得了 5 dB的信噪比增益.
Abstract
Aimed at the problem that the great spatial correlation between sub-channels of the underwater visible light MIMO system,a precoding algorithm based on lattice reduction is proposed.By transforming the MMSE detection operation at the receiving end into the precoding at the transmitter,the problem of noise amplifying of the traditional optical MIMO linear detection algorithm was solved,and the channel matrix with better orthogonality after the lattice reduction was used to obtain the precoding matrix,which reduced correlation between sub-channels of optical MIMO system.The simulation results show that,at the BER of 10-4,compared with the traditional optical MIMO detection algorithm,the system using the lattice reduction precoding algorithm obtains an SNR gain of 5 dB.
关键词
水下光通信/成像多输入多输出系统/格基约减/预编码Key words
Underwater optical communication/Imaging MIMO system/Lattice reduction/Precoding引用本文复制引用
基金项目
国家自然科学基金项目(61761014)
广西自然科学基金项目(2018GXNSFBA281131)
认知无线电与信息处理教育部重点实验室主任基金项目(CRKL190109)
出版年
2024