Open AccessA Design of Two Sub-Stage Square-Root Nyquist Matched Filter
Author(s) -
Ruwu Xiao,
Qiying Lei,
Xuan Guo,
Weitao Du,
Yuping Zhao
Publication year - 2018
Publication title -
ieee access
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.587
H-Index - 127
ISSN - 2169-3536
DOI - 10.1109/access.2018.2828405
Subject(s) - aerospace , bioengineering , communication, networking and broadcast technologies , components, circuits, devices and systems , computing and processing , engineered materials, dielectrics and plasmas , engineering profession , fields, waves and electromagnetics , general topics for engineers , geoscience , nuclear engineering , photonics and electrooptics , power, energy and industry applications , robotics and control systems , signal processing and analysis , transportation
A pair of matched filters whose cascade response satisfies the Nyquist criterion can guarantee the inter-symbol interference (ISI)-free transmission for band-limited communication systems. For a linear phase finite impulse response square root Nyquist filter, it is necessary to strike a balance between the stop-band attenuation (SBA) and ISI performance. This paper proposes a novel approach for obtaining the square root Nyquist filter by adopting two sub-stage cascade filters group, which is known as the compensated half-band (HB) filter group (CHFG). The first sub-stage of the CHFG is a HB filter which can guarantee the required SBA performance on low computational complexity; whereas, the second substage is an ISI compensation filter to ensure that the cascaded response of two CHFGs satisfies the Nyquist criterion. Theoretical analysis and experimental results show that the proposed CHFG can either achieve better SBA/ISI performance or reduce the computational complexity.
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