合成孔径激光雷达频率稳定性问题研究

Study on the frequency stability problem of SAL

频率稳定性是实现合成孔径激光雷达(SAL)的一个关键问题。由于频率稳定性问题可分解为匹配函数的选择问题和系统模糊函数的恶化问题,提出可以采用存储光脉冲依次发射、辅助以参考回波的方案,从而降低SAL对载频长期稳定性的要求,并对该方案下的频率短期稳定性的影响进行了分析。

The problem of frequency stability of SAL is one of the obstacles to establish SAL system. This paper is on the method to deal with the influence of worse frequency stability on SAL system. Since the problem of frequency stability can be decomposed into two problems on looking for a matching-function and a worse ambiguity function, a scheme of transmitting the memorized light pulse with using auxiliary reference point target back-wave is presented to reduce the demand for the frequency long-term stability by SAL system. Finally the frequency shortterm stability in this scheme is analyzed.