Title

Wideband Digital Downconverters For Synthetic Instrumentation

Keywords

Digital downconverter (DDC); Farrow structure; Polynomial-based filter; Sample rate conversion (SRC); Vector signal analyzer (VSA)

Abstract

In this paper, we introduce a new wideband digital downconverter (WDDC) for synthetic instruments (SIs). DDCs first tune to a signal's center frequency using a numerically controlled oscillator and mixer and then zoom-in to the bandwidth of interest using sample rate conversion (SRC). The SRC is required to produce continuously variable output sample rates from a fixed input sample rate over a large range. Current implementations accomplish this using a prefilter, an arbitrary factor resampler, and integer decimation filters. In this paper, we simplify the SRC of the WDDC, yielding a reduction in computational cost by a factor of 3 or more. © 2009 IEEE.

Publication Date

1-1-2009

Publication Title

IEEE Transactions on Instrumentation and Measurement

Volume

58

Issue

2

Number of Pages

263-269

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1109/TIM.2008.2005968

Socpus ID

60149088791 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/60149088791

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