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Deep learning has emerged as a promising solution for efficient channel state information (CSI) feedback in frequency division duplex (FDD) massive MIMO systems. Conventional deep learning-based methods typically rely on a deep autoencoder…

Signal Processing · Electrical Eng. & Systems 2025-07-29 Haotian Tian , Lixiang Lian , Jiaqi Cao , Sijie Ji

Forward channel state information (CSI) often plays a vital role in scheduling and capacity-approaching transmission optimization for massive multiple-input multiple-output (MIMO) communication systems. In frequency division duplex (FDD)…

Signal Processing · Electrical Eng. & Systems 2020-09-22 Zhenyu Liu , Mason del Rosario , Zhi Ding

The potentials of massive multiple-input multiple-output (MIMO) are all based on the available instantaneous channel state information (CSI) at the base station (BS). Therefore, the user in frequency-division duplexing (FDD) systems has to…

Information Theory · Computer Science 2024-10-30 Jiajia Guo , Chao-Kai Wen , Shi Jin

To fully unlock the benefits of multiple-input multiple-output (MIMO) networks, downlink channel state information (CSI) is required at the base station (BS). In frequency division duplex (FDD) systems, the CSI is acquired through a…

Information Theory · Computer Science 2023-05-23 Matteo Nerini , Valentina Rizzello , Michael Joham , Wolfgang Utschick , Bruno Clerckx

In this paper, we propose a novel covariance information-assisted channel state information (CSI) feedback scheme for frequency-division duplex (FDD) massive multi-input multi-output (MIMO) systems. Unlike most existing CSI feedback…

Signal Processing · Electrical Eng. & Systems 2024-12-18 Jialin Zhuang , Xuan He , Yafei Wang , Jiale Liu , Wenjin Wang

Channel state information (CSI) feedback is critical for achieving the promised advantages of enhancing spectral and energy efficiencies in massive multiple-input multiple-output (MIMO) wireless communication systems. Deep learning…

Information Theory · Computer Science 2024-03-29 Suhang Fan , Wei Xu , Renjie Xie , Shi Jin , Derrick Wing Kwan Ng , Naofal Al-Dhahir

Deep Learning (DL)-based channel state information (CSI) feedback is a promising technique for the transmitter to accurately acquire the CSI of massive multiple-input multiple-output (MIMO) systems. As critical concerns about DL-based…

Signal Processing · Electrical Eng. & Systems 2023-05-04 Haozhen Li , Xinyu Gu , Boyuan Zhang , Dongliang Li , Zhenyu Liu , Lin Zhang

Massive MIMO basestations, operating with frequency-division duplexing (FDD), require the users to feedback their channel state information (CSI) in order to design the precoding matrices. Given the powerful capabilities of deep neural…

Information Theory · Computer Science 2024-01-17 Yu Zhang , Ahmed Alkhateeb

In order to fully exploit the advantages of massive multiple-input multiple-output (mMIMO), it is critical for the transmitter to accurately acquire the channel state information (CSI). Deep learning (DL)-based methods have been proposed…

Information Theory · Computer Science 2022-04-26 Ziqing Yin , Wei Xu , Renjie Xie , Shaoqing Zhang , Derrick Wing Kwan Ng , Xiaohu You

Channel state information (CSI) feedback is necessary for the frequency division duplexing (FDD) multiple input multiple output (MIMO) systems due to the channel non-reciprocity. With the help of deep learning, many works have succeeded in…

Information Theory · Computer Science 2023-02-07 Zhilin Lu , Xudong Zhang , Rui Zeng , Jintao Wang

In frequency-division duplex (FDD) massive multiple-input multiple-output (MIMO) systems, the growing number of base station antennas leads to prohibitive feedback overhead for downlink channel state information (CSI). To address this…

Signal Processing · Electrical Eng. & Systems 2024-06-25 Yifan Ma , Hengtao He , Shenghui Song , Jun Zhang , Khaled B. Letaief

Massive MIMO systems rely on accurate Channel State Information (CSI) feedback to enable high-gain beam-forming. However, the feedback overhead scales linearly with the number of antennas, presenting a major bottleneck. While recent deep…

Systems and Control · Electrical Eng. & Systems 2025-12-17 Maryam Ansarifard , Mostafa Rahmani , Mohit K. Sharma , Kishor C. Joshi , George Exarchakos , Alister Burr

Massive multiple-input multiple-output (MIMO) with frequency division duplex (FDD) mode is a promising approach to increasing system capacity and link robustness for the fifth generation (5G) wireless cellular systems. The premise of these…

Networking and Internet Architecture · Computer Science 2019-07-30 Chaojin Qing , Bin Cai , Qingyao Yang , Jiafan Wang , Chuan Huang

In frequency-division duplexing (FDD) massive multiple-input multiple-output (MIMO) systems, 1-bit compressed sensing (CS)-based superimposed channel state information (CSI) feedback has shown many advantages, while still faces many…

Information Theory · Computer Science 2022-05-04 Chaojin Qing , Qing Ye , Bin Cai , Wenhui Liu , Jiafan Wang

Massive multiple-input multiple-output (MIMO) systems are a main enabler of the excessive throughput requirements in 5G and future generation wireless networks as they can serve many users simultaneously with high spectral and energy…

Information Theory · Computer Science 2021-02-15 Mahdi Boloursaz Mashhadi , Deniz Gündüz

Acquiring and utilizing accurate channel state information (CSI) can significantly improve transmission performance, thereby holding a crucial role in realizing the potential advantages of massive multiple-input multiple-output (MIMO)…

Information Theory · Computer Science 2024-03-21 Haotian Wu , Maojun Zhang , Yulin Shao , Krystian Mikolajczyk , Deniz Gündüz

Deep learning-based massive MIMO CSI feedback has received a lot of attention in recent years. Now, there exists a plethora of CSI feedback models mostly based on auto-encoders (AE) architecture with an encoder network at the user equipment…

Information Theory · Computer Science 2022-12-02 Sharan Mourya , SaiDhiraj Amuru , Kiran Kumar Kuchi

Massive multiple-input multiple-output (MIMO) systems require downlink channel state information (CSI) at the base station (BS) to better utilize the available spatial diversity and multiplexing gains. However, in a frequency division…

Information Theory · Computer Science 2021-02-15 Mahdi Boloursaz Mashhadi , Qianqian Yang , Deniz Gunduz

In Wi-Fi systems, channel state information (CSI) plays a crucial role in enabling access points to execute beamforming operations. However, the feedback overhead associated with CSI significantly hampers the throughput improvements. Recent…

Signal Processing · Electrical Eng. & Systems 2024-07-09 Fan Qi , Jiajia Guo , Yiming Cui , Xiangyi Li , Chao-Kai Wen , Shi Jin

Despite the success of large language models (LLMs) across domains, their potential for efficient channel state information (CSI) compression and feedback in frequency division duplex (FDD) massive multiple-input multiple-output (mMIMO)…

Information Theory · Computer Science 2026-03-05 Jie Wu , Wei Xu , Le Liang , Xiaohu You , Mérouane Debbah