Open AccessMultiband signal acquisition using improved modulated wideband converter
Author(s) -
Cai Changxin,
Wen Fangqing,
Huang Dongmei
Publication year - 2019
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2018.5074
Subject(s) - wideband , computer science , pseudorandom binary sequence , electronic engineering , compressed sensing , signal (programming language) , modulation (music) , algorithm , binary number , engineering , mathematics , physics , acoustics , arithmetic , programming language
In this study, the authors stress the problem of sampling and recovering sparse wideband signals. A new methodology for sparse multiband signal acquisition using sinusoidal frequency modulation (SMF) multiplier‐based modulated wideband converter (MWC) is presented. The harmonic property of the SMF signals enables sparse multiband signal to be precisely recovered from the sub‐Nyquist measurements without any high‐speed devices. The proposed architecture offers very close recovery accuracy to the existing pseudorandom binary sequences (PRBS)‐based MWC in the absence of the prior knowledge of sparse wideband signals, while it provides more accurate recovery performance than the PRBS‐MWC in the presence of prior information concerning sparsity. Besides, the proposed architecture is easier for hardware implementation than the PRBS‐MWC. The experimental results demonstrate the effectiveness of the proposed scheme.