32 citations · 53 across the 21 of their papers we have counts for
17 papers · 1 filter
Improved Label Design for Timing Synchronization in OFDM Systems against Multi-path Uncertainty
Chaojin Qing, Shuhai Tang, Na Yang +2
Timing synchronization (TS) is vital for orthogonal frequency division multiplexing (OFDM) systems, which makes the discrete Fourier transform (DFT) window start at the inter-symbo…
Metric Learning-Based Timing Synchronization by Using Lightweight Neural Network
Chaojin Qing, Na Yang, Shuhai Tang +3
Timing synchronization (TS) is one of the key tasks in orthogonal frequency division multiplexing (OFDM) systems. However, multi-path uncertainty corrupts the TS correctness, makin…
ELM-based Timing Synchronization for OFDM Systems by Exploiting Computer-aided Training Strategy
Mintao Zhang, Shuhai Tang, Chaojin Qing +3
Due to the implementation bottleneck of training data collection in realistic wireless communications systems, supervised learning-based timing synchronization (TS) is challenged b…
Cascaded ELM-based Joint Frame Synchronization and Channel Estimation over Rician Fading Channel with Hardware Imperfections
Chaojin Qing, Chuangui Rao, Shuhai Tang +2
Due to the interdependency of frame synchronization (FS) and channel estimation (CE), joint FS and CE (JFSCE) schemes are proposed to enhance their functionalities and therefore bo…
LoS sensing-based superimposed CSI feedback for UAV-Assisted mmWave systems
Chaojin Qing, Qing Ye, Wenhui Liu +3
In unmanned aerial vehicle (UAV)-assisted millimeter wave (mmWave) systems, channel state information (CSI) feedback is critical for the selection of modulation schemes, resource m…
Superimposed Pilot-based Channel Estimation for RIS-Assisted IoT Systems Using Lightweight Networks
Chaojin Qing, Li Wang, Lei Dong +2
Conventional channel estimation (CE) for Internet of Things (IoT) systems encounters challenges such as low spectral efficiency, high energy consumption, and blocked propagation pa…
CNN-based Timing Synchronization for OFDM Systems Assisted by Initial Path Acquisition in Frequency Selective Fading Channel
Chaojin Qing, Na Yang, Shuhai Tang +3
Multi-path fading seriously affects the accuracy of timing synchronization (TS) in orthogonal frequency division multiplexing (OFDM) systems. To tackle this issue, we propose a con…
Lightweight 1-D CNN-based Timing Synchronization for OFDM Systems with CIR Uncertainty
Chaojin Qing, Shuhai Tang, Xi Cai +1
In this letter, a lightweight one-dimensional convolutional neural network (1-D CNN)-based timing synchronization (TS) method is proposed to reduce the computational complexity and…
Transfer Learning-based Channel Estimation in Orthogonal Frequency Division Multiplexing Systems Using Data-nulling Superimposed Pilots
Chaojin Qing, Lei Dong, Li Wang +2
Data-nulling superimposed pilot (DNSP) effectively alleviates the superimposed interference of superimposed training (ST)-based channel estimation (CE) in orthogonal frequency divi…
Fusion Learning for 1-Bit CS-based Superimposed CSI Feedback with Bi-Directional Channel Reciprocity
Chaojin Qing, Qing Ye, Wenhui Liu +1
Due to the discarding of downlink channel state information (CSI) amplitude and the employing of iteration reconstruction algorithms, 1-bit compressed sensing (CS)-based superimpos…
Joint Model and Data Driven Receiver Design for Data-Dependent Superimposed Training Scheme with Imperfect Hardware
Chaojin Qing, Lei Dong, Li Wang +2
Data-dependent superimposed training (DDST) scheme has shown the potential to achieve high bandwidth efficiency, while encounters symbol misidentification caused by hardware imperf…
Enhanced ELM Based Channel Estimation for RIS-Assisted OFDM systems with Insufficient CP and Imperfect Hardware
Chaojin Qing, Li Wang, Lei Dong +1
Reconfigurable intelligent surface (RIS)-assisted orthogonal frequency division multiplexing (OFDM) systems have aroused extensive research interests due to the controllable commun…
Label Design-based ELM Network for Timing Synchronization in OFDM Systems with Nonlinear Distortion
Chaojin Qing, Shuhai Tang, Chuangui Rao +3
Due to the nonlinear distortion in Orthogonal frequency division multiplexing (OFDM) systems, the timing synchronization (TS) performance is inevitably degraded at the receiver. To…
ELM-based Frame Synchronization in Nonlinear Distortion Scenario Using Superimposed Training
Chaojin Qing, Wang Yu, Shuhai Tang +2
The requirement of high spectrum efficiency puts forward higher requirements on frame synchronization (FS) in wireless communication systems. Meanwhile, a large number of nonlinear…
ELM-based Superimposed CSI Feedback for FDD Massive MIMO System
Chaojin Qing, Bin Cai, Qingyao Yang +2
In frequency-division duplexing (FDD) massive multiple-input multiple-output (MIMO), deep learning (DL)-based superimposed channel state information (CSI) feedback has presented pr…
ELM-based Frame Synchronization in Burst-Mode Communication Systems with Nonlinear Distortion
Chaojin Qing, Wang Yu, Bin Cai +2
In burst-mode communication systems, the quality of frame synchronization (FS) at receivers significantly impacts the overall system performance. To guarantee FS, an extreme learni…
Superimposed Coding Based CSI Feedback Using 1-Bit Compressed Sensing
Chaojin Qing, Qingyao Yang, Bin Cai +2
In a frequency division duplex (FDD) massive multiple input multiple output (MIMO) system, the channel state information (CSI) feedback causes a significant bandwidth resource occu…