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研究GNSS海面散射信号相关功率,对反演海面风速具有非常重要的作用。针对低信噪比下,传统的方法不能成功捕获卫星信号,无法得到海面散射信号相关功率的问题,提出一种延长相干积分时间来获得海面散射信号相关功率的方法,并进行了仿真。将仿真结果与传统方法的仿真结果进行对比分析,发现该方法可以捕获到卫星信号,提高了接收机的灵敏度并准确绘制了海面散射信号相关功率波形图。
Studying the relative power of GNSS signals scattered by the sea surface plays a very important role in the inversion of the sea surface wind speed. Aiming at low SNR, the traditional method can not acquire the satellite signal successfully and can not get the power of scattering signals from the sea surface. A method to extend the coherent integration time to obtain the relative power of the sea surface scattering signal is proposed and simulated. The simulation results are compared with the simulation results of the traditional methods. It is found that this method can capture the satellite signals, improve the sensitivity of the receiver and accurately plot the relative power waveforms of the signals scattered by the sea surface.