For high order QAM ( Quadrature Amplitude Modulation) signals, the residual square error of CMA ( Constant Modulus Algorithm) is unacceptably large and the convergence rate of MMA ( Multi Modulus Algorithm) is too slow. 对于高阶QAM信号,常数模算法的收敛误差不为零,而多模算法的收敛速度慢。
A new algorithm for detecting and repairing cycle slips is proposed with single reference station working statically in dual frequency. The parameters of time locked in receiver, ionosphere residual error and carrier phase rate are utilized in this algorithm. 针对参考站单站静态双频的特点,提出一种周跳检测与修复的新方法,根据接收机提供的锁定时间信息,综合利用电离层残差和载波相位变化率准确探测并修复周跳。
The results prove that the proposed algorithm has the advantages of robustness, low residual mean square error, cold start and restart ability, and can greatly reduce the error rate and improve the robustness of high-speed underwater acoustic communication. 结果表明:该算法性能稳健,收敛后均方误差小,有效降低了高速水声通信的误码率,提高了水声信道均衡的稳定性,且有良好的冷启动和重新启动能力。
Simulations result show that Chase combining improves the performance in terms of residual frame error rate and throughput and can bring higher throughput in multi-path channel at a high speed. 仿真结果表明,Chase合并能减小误帧率和提高吞吐率,并在多经信道和高速条件下,仍能获得较高吞吐量。
The analysis of residual error coefficients, cross-product coefficients 'regularity and the further simulation result indicate that the hardware-enhanced angle rate algorithm has higher precision and can be a new idea to improve the attitude accuracy of the strapdown inertial navigation system. 对新算法误差主项和补偿系数的规律性分析以及进一步的仿真结果表明,硬件增强角速率输入算法具有较高的精度,是提高角速率输出捷联惯导系统姿态算法精度的一种新思路。
Detection and Reparation for Cycle Slips Using Ionosphere Residual Error Method and Carrier Phase Rate Method 综合利用电离层残差法和载波相位变化率法探测并修复周跳
The simulation results show that the robust algorithm can not only improve the convergence speed, but also reduce steady residual error and bit error rate. 仿真实验结果表明了该鲁棒性算法具有良好的性能,在收敛速度、稳态剩余误差、误码率等性能方面均有改善。