Non-coherent ranging method and realization in laser communication

The space laser communication system based on the OOK communication system has been widely used, especially in the satellite-ground high speed data transmission link and inter-satellite communication system. With the demand for distance measurement based on the OOK communication system becomes shistronger, especially for satellite internet systems based on laser links, the traditional OOK ranging accuracy, which is about meter level, could not meet the needs for modern ranging application. With the introduction of asynchronous response OKK ranging methods, the accuracy has increased to centimeter level, but the system has become more and more complex with the increase of the communication rate. This paper proposes a new OOK system laser link ranging method, that the ranging accuracy is not related to communication rate and sampling rate, but only to the phase detection accuracy of the phase detector, which solves the problem of positive correlation between communication rate and system complexity under the requirement of high-precision ranging. At the same time, this method can guarantee millimeter level ranging accuracy at a communication rate of 300Mbps to 10Gbps.