Scholarlink

<p>In doubly-dispersive fading channels, the emergent Orthogonal Time Frequency Space (OTFS) modulation provides dependable reliability enhancements over Orthogonal Frequency Division Multiplexing (OFDM). OTFS demonstrates significant performance benefits over Doppler in situations involving high mobility. The diversity of a doubly-dispersive wireless channel is significantly influenced by the use of signal detectors. To improve symbol level channel’s reliability and reduce cross-symbol interference, Successive Interference Cancelling (SIC) detectors based on QR Decomposition (QRD) are being developed. In this article, in addition to QRD-SIC, we introduced Adhesive and Interwoven structure to enhance the OTFS detector’s performance to near-optimal levels. The proposed Adhesive and Interwoven QRD-SIC Detector operates by decomposing the channel matrix into an upper triangle matrix and a unitary matrix. Subsequently, interference cancellation is executed in a series, taking into consideration the channel structure. Simulation results obtained using MATLAB, under a linear time-varying Rayleigh fading channel model shows that for 4QAM, 8QAM, 16QAM, 32QAM and 64QAM Interwoven QRD-SIC detector performs better and for 128QAM, 256QAM, and 512QAM Adhesive QRD-SIC detector shows superior BER performance when compared to existing state-of-the-art detectors.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

A Complexity Reduced Adhesive and Interwoven QRD-SIC Detector for OTFS

  • 期刊论文

  • 发表日期：

    2025年3月1日

查看全文
  • Afreen Kubra,
  • S. Safinaz

摘要

In doubly-dispersive fading channels, the emergent Orthogonal Time Frequency Space (OTFS) modulation provides dependable reliability enhancements over Orthogonal Frequency Division Multiplexing (OFDM). OTFS demonstrates significant performance benefits over Doppler in situations involving high mobility. The diversity of a doubly-dispersive wireless channel is significantly influenced by the use of signal detectors. To improve symbol level channel’s reliability and reduce cross-symbol interference, Successive Interference Cancelling (SIC) detectors based on QR Decomposition (QRD) are being developed. In this article, in addition to QRD-SIC, we introduced Adhesive and Interwoven structure to enhance the OTFS detector’s performance to near-optimal levels. The proposed Adhesive and Interwoven QRD-SIC Detector operates by decomposing the channel matrix into an upper triangle matrix and a unitary matrix. Subsequently, interference cancellation is executed in a series, taking into consideration the channel structure. Simulation results obtained using MATLAB, under a linear time-varying Rayleigh fading channel model shows that for 4QAM, 8QAM, 16QAM, 32QAM and 64QAM Interwoven QRD-SIC detector performs better and for 128QAM, 256QAM, and 512QAM Adhesive QRD-SIC detector shows superior BER performance when compared to existing state-of-the-art detectors.