基于采样点选择和矢量旋转的多载波CDMA定时跟踪方案
A Reduced Complexity Timing Tracking Scheme for Multi-Carrier CDMA Signals Based on Samples Selecting and Vector Rotation
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摘要: 针对多载波CDMA系统的特点，该文提出一种基于采样点选择和矢量旋转的全数字定时跟踪方案。该方案充分利用准时路复相关矢量信息，通过矢量旋转得到非相干定时误差检测量，进行定时跟踪调整。理论分析和数值结果表明，该方案较传统的延迟锁定跟踪方案明显降低了实现复杂度，而且性能有所提高。Abstract: A reduced-complexity all-digital timing tracking scheme suited for multi-carrier CDMA signals is proposed and studied. Based on samples selecting and vector rotation of correlation output vector at only on time channel, timing error detection statistics are approximately acquired and timing adjustment are carried out. Theoretical and numerical results show that the new scheme has an improved performance and remarkable complexity simplicity as compared with the classical digital delay-locked loop.
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