Design and Implementation of High-Concurrency Backscatter Communication Based on OFDM Single-Subcarrier

To address the limited computational resources in backscatter tags and performance degradation under collisions, this paper proposes a high-concurrency backscatter communication algorithm using OFDM single-subcarrier modulation. By allocating individual subcarriers as backscattering carriers and enabling frequency-division multiple access, the system achieves 200 concurrent tags with 87% decoding success rate and 16.64 Mbps throughput indoors, outperforming state-of-the-art by 1.4×.