2024RAA....24a5021W

Query : 2024RAA....24a5021W

2024RAA....24a5021W - Research in Astron. and astroph., 24, part no 1, 5021 (2024/January-0)

The RFI Fast Mitigation Algorithm Based on Block LMS Filter.

WU H., ZHANG H.-L., ZHANG Y.-Z., WANG J., DU X., ZHANG T. and YE X.-C.

Abstract (from CDS):

The radio telescope possesses high sensitivity and strong signal collection capabilities. While receiving celestial radiation signals, it also captures Radio Frequency Interferences (RFIs) introduced by human activities. RFI, as signals originating from sources other than the astronomical targets, significantly impacts the quality of astronomical data. This paper presents an RFI fast mitigation algorithm based on block Least Mean Square (LMS) algorithm. It enhances the traditional adaptive LMS filter by grouping L adjacent time-sampled points into one block and applying the same filter coefficients for filtering within each block. This transformation reduces multiplication calculations and enhances algorithm efficiency by leveraging the time-domain convolution theorem. The algorithm is tested using baseband data from the Parkes 64 m radio telescope's pulsar observations and simulated data. The results confirm the algorithm's effectiveness, as the pulsar profile after RFI mitigation closely matches the original pulsar profile.

Journal keyword(s): methods: data analysis - techniques: interferometric - (stars:) pulsars: individual (J0437-4715)

Simbad objects: 1

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Number of rows : 1

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2026	#notes
1	PSR J0437-47	Psr	04 37 15.7994581776	-47 15 08.544351636						DC	1032	0

Query : 2024RAA....24a5021W

Basic data :

PSR J0437-47 -- Pulsar

gam (1FGL,2FGL,...), Psr (2010ApJS,PSR), UV (2EUVE,EUVE,...), WD* (1993A&A), WD? (2021MNRAS), * (Gaia), X (1RXS)

04 37 15.7994581776 -47 15 08.544351636 (Optical) [ 0.4591 0.5165 90 ] A 2020yCat.1350....0G

04 35 49.1333739767 -47 21 02.168206040 [ 0.4591 0.5165 90 ]

253.3942738065460 -41.9636805551994 [ 0.4591 0.5165 90 ]

121.646 -70.697 [0.574 0.650 90] A 2020yCat.1350....0G

7.1008 [0.5245] A 2020yCat.1350....0G

DC D 1993A&A...276..382D

G 20.348751 [0.006881] C 2020yCat.1350....0G

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`PSR J0437-47`	`2FGL J0437.3-4712`	`PSR B0435-47`	`Gaia DR2 4789864076732331648`
`2EUVE J0437-47.2`	`3FGL J0437.2-4713`	`PSR J0437-4715`	`Gaia DR3 4789864076732331648`
`EUVE J0437-47.2`	`4FGL J0437.2-4715`	`1RXS J043714.5-471503`
`1FGL J0437.2-4715`	`FL8Y J0437.2-4715`	`XMMOM J043715.8-471508`

References (1032 between 1850 and 2026) (Total 1032)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).

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EUVE J0437-47.2 1RXS J043714.5-471503 Gaia DR2 4789864076732331648 Gaia DR3 4789864076732331648

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