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

Pulsar alerts obtained with radio telescopes are extraordinarily weak. Usually, there are two major difficulties in pulsar sign processing—one is the radio-frequency interference (RFI) mitigation, and the opposite one is info loss as a result of preprocessing and mitigation itself.

Due to this fact, the innovations in RFI elimination methodology are significant to hold out additional research on the astronomical measurements, resembling pulsar timing.

Utilizing pulsar knowledge 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 alerts to perform RFI mitigation and sign restoration concurrently.

The wavelet rework and discrete cosine rework had been utilized as a sparse selling time period to help 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 had been brought about. This methodology can enhance the timing accuracy to a sure extent by lowering the timing residuals and the estimated errors.

The outcomes had been revealed in The Astrophysical Journal.