Time and Frequency Synchronization for OTFS

Article Engineering, Electrical & Electronic

Low-Complexity Symbol Detection and Interference Cancellation for OTFS System

Huiyang Qu et al.

Summary: Orthogonal time frequency space (OTFS) is a two-dimensional modulation scheme aimed at robust wireless transmissions in high-mobility environments. This article proposes a block-wise OTFS receiver for OTFS signal transmission over continuous-Doppler-spread channels, which significantly reduces detection errors and computational complexity.

IEEE TRANSACTIONS ON COMMUNICATIONS (2021)

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Article Computer Science, Information Systems

Downlink Synchronization for OTFS-Based Cellular Systems in High Doppler Environments

Mohammed Saquib Khan et al.

Summary: This paper proposes a downlink synchronization and cell identity estimation technique for cellular systems based on OTFS, which achieves accurate ST and SCID detection in high-mobility scenarios through analyzing autocorrelation functions and developing receiver processing schemes. Additionally, the influence of OTFS modulation on ZC sequences is investigated and a low-complexity detection algorithm is applied for SCID detection.

IEEE ACCESS (2021)

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Article Computer Science, Information Systems

Time Domain Channel Estimation and Equalization of CP-OTFS Under Multiple Fractional Dopplers and Residual Synchronization Errors

Suvra Sekhar Das et al.

Summary: This work introduces a time domain channel estimation method for OTFS to combat the impact of residual synchronization errors in high mobility scenarios. By analyzing the effects of residual synchronization errors, it is shown that OTFS exhibits better sparsity in time domain channel representation. In addition, utilizing low complexity MMSE equalization and SIC receiver can enhance system performance and mitigate against residual synchronization errors.

IEEE ACCESS (2021)

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Article Engineering, Electrical & Electronic