西安电子科技大学学报（自然科学版）2025，Vol.52Issue(3)：61-72,12.DOI:10.19665/j.issn1001-2400.20250109
OTFS分阶段权重调控的MRC检测算法
Staged weight-controlled MRC detection algorithm for the OTFS system
摘要
Abstract
Orthogonal time frequency space(OTFS)modulation is a novel signal modulation technique proposed in recent years,specifically designed to address the degradation in communication quality caused by Doppler shifts in high-mobility multipath transmission scenarios.To overcome the inter-symbol interference(ISI)generated during transmission process,a Zero-Padded OTFS modulation structure is employed,with a focus on analyzing the impact of weight coefficients,iteration number,signal-to-noise ratio(SNR),and modulation order on system convergence and bit error rate(BER)performance in the Maximal Ratio Combining(MRC)detection algorithm with the remodulation weighted output in the delay-time domain.To address the issue of a high iteration number caused by fixed optimal weight coefficients under high-order modulation schemes,an MRC detection algorithm based on staged weight coefficient control is proposed.By appropriately setting weight coefficients at different iterative stages,the weight selection at each stage can better align with the needs of the current system state,thereby gradually optimizing the traditional MRC detection process and improving overall detection performance.Experimental results show that the improved MRC detection algorithm significantly accelerates convergence and further enhances the system BER performance while maintaining the same number of iterations.Moreover,the improved algorithm exhibits a strong adaptability and robustness across various channel conditions,effectively combating rapidly time-varying channels in high-mobility scenarios.关键词
正交时频空/最大比合并/低复杂度/信号检测Key words
orthogonal time frequency space/maximal ratio combining/low complexity/signal detection分类
信息技术与安全科学引用本文复制引用
党柯,孙锦华,吴小钧..OTFS分阶段权重调控的MRC检测算法[J].西安电子科技大学学报（自然科学版）,2025,52(3):61-72,12.基金项目
国家自然科学基金(61271175) （61271175）
