研究目的
Investigating the performance of an adaptive square-root unscented Kalman filter for carrier recovery in satellite-to-ground coherent optical communication systems.
研究成果
The proposed adaptive square-root unscented Kalman filter (ASRUKF) demonstrates superior performance in carrier recovery for satellite-to-ground coherent optical communication systems compared to the linear Kalman filter (LKF). It offers a wider range of block size and laser linewidth options, reduces the required transmit power by up to 0.5-3 dB under different zenith angles, and achieves high estimation accuracy and fast tracking capability simultaneously in dynamic frequency offset scenarios. The ASRUKF also shows better tolerance against initial errors in process and measurement noise covariance matrices, making it a robust option for carrier recovery in such systems.
研究不足
The study is based on simulations, and the practical implementation of the proposed ASRUKF scheme in real-world satellite-to-ground coherent optical communication systems may face challenges not accounted for in the simulations. Additionally, the performance of ASRUKF is compared only with LKF, and its comparison with other advanced carrier recovery algorithms is not explored.
1：Experimental Design and Method Selection:
The study proposes an adaptive square-root unscented Kalman filter (ASRUKF) with a parallelized architecture for carrier recovery in QPSK based satellite-to-ground coherent optical communication systems. A new observation model is introduced to enhance state estimation accuracy. The process noise covariance (Q) and the measurement noise covariance (R) are adaptively estimated to align with their theoretical covariance.
2：Sample Selection and Data Sources:
Simulations are conducted to compare the performance of the proposed ASRUKF scheme with that of a linear Kalman filter (LKF) under various conditions, including different zenith angles and laser linewidths.
3：List of Experimental Equipment and Materials:
The study utilizes MATLAB software tool for simulations, with parameters such as laser wavelength, data rate, beam divergence, and others detailed in the paper.
4：Experimental Procedures and Operational Workflow:
The performance of ASRUKF and LKF is evaluated through simulations that vary block size, laser linewidth, and transmit power under different zenith angles. The tracking capabilities and BER performances are analyzed.
5：Data Analysis Methods:
The study employs statistical analysis to compare the BER performances and tracking capabilities of ASRUKF and LKF, demonstrating the superiority of ASRUKF in terms of wider block size and laser linewidth options, reduced transmit power requirements, and better tolerance against initial errors in Q and R.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
