A Real-Time Data Acquisition System for Coherent Lidar

This paper presents a data acquisition system used for lidar signal receiving. To satisfy the need of lidar receiver system, a data acquisition system needs to be capable of sampling signal stably in a large magnitude range and can work in real time. To realize stable sampling in high speed, a new method using tap tuning for phase margin adjustment is proposed, which shows a good result in verification. Furthermore, automation method of error correction is introduced in this paper, which can accelerate the process of product development. In actual test, the DAQ can satisfy the need of lidar signal receiving and has a good performance.