Alert button
Picture for Mengting Lou

Mengting Lou

Alert button

Multistatic Integrated Sensing and Communication System in Cellular Networks

May 22, 2023
Zixiang Han, Lincong Han, Xiaozhou Zhang, Yajuan Wang, Liang Ma, Mengting Lou, Jing Jin, Guangyi Liu

Figure 1 for Multistatic Integrated Sensing and Communication System in Cellular Networks
Figure 2 for Multistatic Integrated Sensing and Communication System in Cellular Networks
Figure 3 for Multistatic Integrated Sensing and Communication System in Cellular Networks
Figure 4 for Multistatic Integrated Sensing and Communication System in Cellular Networks

A novel multistatic multiple-input multiple-output (MIMO) integrated sensing and communication (ISAC) system in cellular networks is proposed. It can make use of widespread base stations (BSs) to perform cooperative sensing in wide area. This system is important since the deployment of sensing function can be achieved based on the existing mobile communication networks at a low cost. In this system, orthogonal frequency division multiplexing (OFDM) signals transmitted from the central BS are received and processed by each of the neighboring BSs to estimate sensing object parameters. A joint data processing method is then introduced to derive the closed-form solution of objects position and velocity. Numerical simulation shows that the proposed multistatic system can improve the position and velocity estimation accuracy compared with monostatic and bistatic system, demonstrating the effectiveness and promise of implementing ISAC in the upcoming fifth generation advanced (5G-A) and sixth generation (6G) mobile networks.

Viaarxiv icon

From ORAN to Cell-Free RAN: Architecture, Performance Analysis, Testbeds and Trials

Feb 07, 2023
Yang Cao, Ziyang Zhang, Xinjiang Xia, Pengzhe Xin, Dongjie Liu, Kang Zheng, Mengting Lou, Jing Jin, Qixing Wang, Dongming Wang, Yongming Huang, Xiaohu You, Jiangzhou Wang

Figure 1 for From ORAN to Cell-Free RAN: Architecture, Performance Analysis, Testbeds and Trials
Figure 2 for From ORAN to Cell-Free RAN: Architecture, Performance Analysis, Testbeds and Trials
Figure 3 for From ORAN to Cell-Free RAN: Architecture, Performance Analysis, Testbeds and Trials
Figure 4 for From ORAN to Cell-Free RAN: Architecture, Performance Analysis, Testbeds and Trials

Open radio access network (ORAN) provides an open architecture to implement radio access network (RAN) of the fifth generation (5G) and beyond mobile communications. As a key technology for the evolution to the sixth generation (6G) systems, cell-free massive multiple-input multiple-output (CF-mMIMO) can effectively improve the spectrum efficiency, peak rate and reliability of wireless communication systems. Starting from scalable implementation of CF-mMIMO, we study a cell-free RAN (CF-RAN) under the ORAN architecture. Through theoretical analysis and numerical simulation, we investigate the uplink and downlink spectral efficiencies of CF-mMIMO with the new architecture. We then discuss the implementation issues of CF-RAN under ORAN architecture, including time-frequency synchronization and over-the-air reciprocity calibration, low layer splitting, deployment of ORAN radio units (O-RU), artificial intelligent based user associations. Finally, we present some representative experimental results for the uplink distributed reception and downlink coherent joint transmission of CF-RAN with commercial off-the-shelf O-RUs.

Viaarxiv icon