Beixiong Zheng's research while affiliated with National University of Singapore and other places

Publications (7)

Preprint
In this letter, we consider an intelligent reflecting surface (IRS)-assisted multiuser communication system, where an IRS is deployed to provide virtual line-of-sight (LoS) links between an access point (AP) and multiple users. We consider the practical codebook-based IRS passive beamforming and study efficient design for IRS reflect beam training,...
Preprint
To achieve the full passive beamforming gains of intelligent reflecting surface (IRS), accurate channel state information (CSI) is indispensable but practically challenging to acquire, due to the excessive amount of channel parameters to be estimated which increases with the number of IRS reflecting elements as well as that of IRS-served users. To...
Article
The integration of intelligent reflecting surface (IRS) to multiple access networks is a cost-effective solution for boosting spectrum/energy efficiency and enlarging network coverage/connections. However, due to the new capability of IRS in reconfiguring the wireless propagation channels, it is fundamentally unknown which multiple access scheme is...
Preprint
The integration of intelligent reflecting surface (IRS) to multiple access networks is a cost-effective solution for boosting spectrum/energy efficiency and enlarging network coverage/connections. However, due to the new capability of IRS in reconfiguring the wireless propagation channels, it is fundamentally unknown which multiple access scheme is...
Preprint
Intelligent reflecting surface (IRS) has emerged as a promising technology to engineer the radio signal propagation for catering to wireless communication, by leveraging a massive number of low-cost passive reflecting elements. Prior studies on IRS have mostly assumed perfect channel state information (CSI) available for designing the IRS passive b...
Article
In the intelligent reflecting surface (IRS)-enhanced wireless communication system, channel state information (CSI) is of paramount importance for achieving the passive beamforming gain of IRS, which, however, is a practically challenging task due to its massive number of passive elements without transmitting/receiving capabilities. In this letter,...
Preprint
In this paper, we consider an intelligent reflecting surface (IRS)-aided single-user system where an IRS with discrete phase shifts is deployed to assist the uplink communication. A practical transmission protocol is proposed to execute channel estimation and passive beamforming successively. To minimize the mean square error (MSE) of channel estim...

Citations

... Given the advantages of both NOMA and IRS, there is a growing research interest on IRS-aided NOMA systems [36][37][38][39][40][41][42][43][44][45][46][47][48]. For instance, the authors in [36] examine a simple design of an IRS-assisted MISO-NOMA system in which the users are separated into two groups, namely the cell-center and the celledge users. ...
... Due to its great benefit in improving communication performance, the IRS has been extensively used in various communication scenarios to realize diverse desired goals, such as SNR or capacity maximization [7,8], sum rate maximization [9], power minimization or energy efficiency maximization [3, 10], and symbol-error-rate minimization [11,12]. Also, the IRS has been proposed to be integrated with other promising technologies, such as orthogonal frequency division multiplexing (OFDM) [13,14], massive MIMO [15, 16], millimeter wave (mmWave) [17, 18], deep learning [19, 20], cognitive radio [21, 22], physical layer security [23, 24], unmanned aerial vehicle (UAV) [25, 26], and simultaneous wireless information and power transfer (SWIPT) [27], to improve the communication performance of the considered systems. ...