Research Article
Research on Far-Near Effect in Cooperative Integrated Sensing and Communication
@INPROCEEDINGS{10.1007/978-3-032-33662-0_33, author={Xiaoqian Wang and Rongyan Xi and Hongjun He and Tao Jiang and Liang Xia and Guangyi Liu}, title={Research on Far-Near Effect in Cooperative Integrated Sensing and Communication}, proceedings={Communications and Networking. 20th EAI International Conference, ChinaCom 2025, Xi’an, China, November 8--9, 2025, Proceedings}, proceedings_a={CHINACOM}, year={2026}, month={10}, keywords={Integrated sensing and communication far-near effect 6G environmental clutter elimination}, doi={10.1007/978-3-032-33662-0_33} }- Xiaoqian Wang
Rongyan Xi
Hongjun He
Tao Jiang
Liang Xia
Guangyi Liu
Year: 2026
Research on Far-Near Effect in Cooperative Integrated Sensing and Communication
CHINACOM
Springer
DOI: 10.1007/978-3-032-33662-0_33
Abstract
The integrated sensing and communication (ISAC) system is a key research direction for 6G, where it faces multiple challenges in both communication and radar functionalities. In this paper, we investigate the near-far effect (FNE) problem in an orthogonal frequency division multiplexing (OFDM)-based ISAC system. Firstly, a cooperative ISAC prototype platform is built to confirm the specific impact of FNE. Based on the experimental results, it is found that the FNE is caused by the main and side lobes of a target with strong power in 2D-fast Fourier transform (2D-FFT) matrix when the received power is not saturated. It can be suppressed using environmental clutter elimination and moving target detection (MTD). In addition, we model the FNE problem as a 2D sinc function and derive a theoretical FNE threshold. The ideal theoretical FNE threshold is 13 dB when considering only the first side lobe, and the measured FNE threshold is about 8 dB. This difference is attributed to the received bottom noise, signal randomness and environmental factors.