Proposed method for radio-frequency interference mitigation and signal restoration of pulsar signals

Pulsar indicators obtained with radio telescopes are extraordinarily weak. Usually, there are two main difficulties in pulsar sign processing—one is the radio-frequency interference (RFI) mitigation, and the opposite one is data loss because of the preprocessing and mitigation itself.

Subsequently, the innovations in RFI elimination methodology are significant to hold out additional research on the astronomical measurements, similar to pulsar timing.

Utilizing pulsar information collected by the NanShan 26-m Radio Telescope (NSRT) from 2011 to 2014, researchers from the Xinjiang Astronomical Observatory (XAO) of the Chinese language Academy of Sciences have proposed a novel methodology referred to as “CS-Pulsar,” which carries out compressed sensing (CS) on time-frequency indicators to perform RFI mitigation and sign restoration concurrently.

The wavelet rework and discrete cosine rework have been utilized as a sparse selling time period to assist the optimization. Outcomes confirmed that the sensing mechanism carried out higher in sign restoration for the preprocessed channels, and performed a optimistic function in mitigating “on pulse” RFI.

In an software of pulsar timing, no systematic biases or underestimated uncertainties have been induced. This methodology can enhance the timing accuracy to a sure extent by decreasing the timing residuals and the estimated errors.

The outcomes have been revealed in The Astrophysical Journal.