CAJ | 학술논문

针对信道均衡过程中的均衡器输出相位连续旋转问题,提出一种带有二阶数字锁相环的分数间隔超指数迭代盲均衡算法.该算法利用分数间隔超指数迭代算法加强对信道多途的抑制,利用二阶数字锁相环消除均衡器输出信号连续相位旋转,从而实现对原始发射信号的正确恢复.水池实验结果表明:该算法相对于常规盲均衡算法,收敛速度快,剩余均方误差小,能够有效地消除均衡器输出信号相位连续旋转,从而降低水声通信系统的误码率.
침대신도균형과정중적균형기수출상위련속선전문제,제출일충대유이계수자쇄상배적분수간격초지수질대맹균형산법.해산법이용분수간격초지수질대산법가강대신도다도적억제,이용이계수자쇄상배소제균형기수출신호련속상위선전,종이실현대원시발사신호적정학회복.수지실험결과표명:해산법상대우상규맹균형산법,수렴속도쾌,잉여균방오차소,능구유효지소제균형기수출신호상위련속선전,종이강저수성통신계통적오마솔.
To solve the problem of continuous phase rotation of the equalizer output during the process of channel equalization, a fractionaily-spaced super-exponential iteration (FSSEI) algorithm with second order digital phase-locked loop (DPLL2) is proposed. The proposed algorithm realizes the transmitted sequence recovery by utilizing FSSEI algorithm to restrain the multi-path effect and using DPLL2 to eliminate continuous phase rotation of the equalizer output. The results of tank experiments show that the proposed algorithm has faster convergence speed and lower residual mean square error than several other blind equalization algorithms. It can solve the problem of continuous phase rotation and reduce bit error rate of underwater communication systems.