VLBI wideband digital SSB converter based on poly-phase filter banks

Chen L, Unbehauen R, Luo J, Zhang X, Roßmanith H, Feng Z (2010)

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2010

Journal

Electrical Engineering Springer Verlag (Germany)

Publisher: SPRINGER

Book Volume: 92

Pages Range: 49-56

Journal Issue: 2

DOI: 10.1007/s00202-010-0158-2

Abstract

With the further development in astronomy and deep space exploration, the incremental improvements to be expected in the very long baseline interferometry (VLBI) is real-time, high sensitivity, high reliability and wider frequency coverage. The VLBI data acquisition backend plays an important role in the VLBI station. Recently, based on advances in digital hardware like analog-to-digital conversion, digital signal processing, field programmable gate arrays (FPGA) and so on, it has become practical to sample and digitally process the intermediate frequency signal directly. Digital base-band converters (DBBC) will replace analog base-band converters (ABBC) in the VLBI data acquisition backend. This paper presents a sequence of simple modifications to sampled data structures based on the analog prototype system to obtain the basic poly-phase structure in a VLBI data acquisition backend. The theoretical principles of a digital SSB down converter are discussed in detail. The approach adopts multi-rate signal processing for the designed filters in a digital SSB down converter which is carried out by virtex-4 FPGA chips. The observation result shows this model of DBBC is of better performances than ABBC.

Authors with CRIS profile

Rolf Unbehauen Technische Fakultät Hans Roßmanith Professur für Optoelektronik

Involved external institutions

Tongji University / 同济大学 CN China (CN) Chinese Academy of Sciences (CAS) / 中国科学院 CN China (CN) Shanghai Institute of Technology CN China (CN)

How to cite

APA:

Chen, L., Unbehauen, R., Luo, J., Zhang, X., Roßmanith, H., & Feng, Z. (2010). VLBI wideband digital SSB converter based on poly-phase filter banks. Electrical Engineering, 92(2), 49-56. https://dx.doi.org/10.1007/s00202-010-0158-2

MLA:

Chen, Lan, et al. "VLBI wideband digital SSB converter based on poly-phase filter banks." Electrical Engineering 92.2 (2010): 49-56.

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