Design of FRB real-time search backend for multi-beam receiver

Fast radio burst (FRB) is an occasional and instantaneous radio burst. In order to detect more samples for research, this paper develops a real-time search digital backend based on multi-beam receiver. The system includes data acquisition and processing, single-beam signal processing, multi-beam signal synthesis and analysis, detection results storage and distribution. It can collect and analyze multi-beam signals simultaneously. Multi-beam signal reference effect is used to eliminate radio frequency interference and improve detection accuracy. Observation experiments were carried out on a radio telescope. The function of FRB detection was tested by capturing the single pulse signal of a pulsar. The result shows that the digital backend can achieve accurate and real-time FRB detection.