2023/10/11 by Xuehan Wang, Wang, Xuehan, Shi Xu +5 · 1 citation
Engineering · Mathematics · #Advanced Fiber Optic Sensors #Algorithm #Artificial intelligence #Channel (broadcasting) #Computer science #Control (management) #Control theory (sociology) #Cyclic prefix #Doppler effect #Electronic engineering #Engineering #Equalization (audio) #FOS: Computer and information sciences #FOS: Electrical engineering #Guard interval #Information Theory (cs.IT) #Mathematics #Optical Network Technologies #Orthogonal frequency-division multiplexing #PAPR reduction in OFDM #Signal Processing (eess.SP) #Telecommunications #electronic engineering #information engineering
paper · pdf · doi:10.48550/arxiv.2310.07200
openalex publication_date 2023/10/11 · openalex created_date 2023/10/13 · openalex updated_date 2026/07/28
In orthogonal time frequency space (OTFS) systems, the impact of frequency-dependent Doppler which is referred to as the Doppler squint effect (DSE) is accumulated through longer duration, whose negligence has prevented OTFS systems from exploiting the performance superiority. In this paper, practical OFDM system using cyclic prefix time guard interval (CP-OFDM)-based OTFS systems with DSE are adopted. Cyclic prefix (CP) length is analyzed while the input-output relation considering DSE is derived. By deploying two prefix OFDM symbols, the channel estimation can be easily divided into three parts as delay detection, Doppler extraction and gain estimation. The linear equalization scheme is adopted taking the block diagonal property of the channel matrix into account, which completes the low-complexity receiver design. Simulation results confirm the significance of DSE and the considerable performance of the proposed low-complexity receiver scheme considering DSE.