Search Results for author: Guojun Han

Found 5 papers, 0 papers with code

Simultaneously Transmitting and Reflecting (STAR) RIS Assisted Over-the-Air Computation Systems

no code implementations5 Jan 2023 Xiongfei Zhai, Guojun Han, Yunlong Cai, Yuanwei Liu, Lajos Hanzo

The performance of over-the-air computation (AirComp) systems degrades due to the hostile channel conditions of wireless devices (WDs), which can be significantly improved by the employment of reconfigurable intelligent surfaces (RISs).

Dynamic Write-Voltage Design and Read-Voltage Optimization for MLC NAND Flash Memory

no code implementations3 Sep 2022 Runbin Cai, Yi Fang, Zhifang Shi, Lin Dai, Guojun Han

To mitigate the impact of noise and interference on multi-level-cell (MLC) flash memory with the use of low-density parity-check (LDPC) codes, we propose a dynamic write-voltage design scheme considering the asymmetric property of raw bit error rate (RBER), which can obtain the optimal write voltage by minimizing a cost function.

A New Frequency-Bin-Index LoRa System for High-Data-Rate Transmission: Design and Performance Analysis

no code implementations29 Mar 2021 Huan Ma, Yi Fang, Guofa Cai, Guojun Han, Yonghui Li

To further improve the system flexibility, we formulate a generalized modulation scheme and propose scheme II by treating the SFB groups as an additional type of transmission entity.

Design and Performance Analysis of a New STBC-MIMO LoRa System

no code implementations28 Jun 2020 Huan Ma, Guofa Cai, Yi Fang, Pingping Chen, Guojun Han

The result demonstrates that the diversity order of the system in the imperfect CSI scenario with fixed channel estimate error variance is zero.

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