An analog approach to suppressing in-band narrow-band interference in UWB receivers

Timothy Wayne Fischer, Burak Kelleci, Kai Shi, Aydin Ilker Karşilayan, Erchin Serpedin

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Due to the huge bandwidth of ultra-wide-band (UWB) systems, in-band narrow-band interference (NBI) may hinder receiver performance. Sources of potential NBI that lie within the IEEE 802.15.3a UWB bandwidth are presented. To combat interference in multi-band orthogonal frequency-division multiplexing (MB-OFDM) UWB systems, an analog notch filter is designed to be included in the UWB receive chain. The filter's architecture is based on feedforward subtraction of the interference, and includes a least-mean-square (LMS) tuning scheme to match amplitudes of the two paths. An 8-bit discrete control is used to adjust the filter's center frequency across the UWB baseband. It was fabricated in TSMC's 0.18-μm process, and experimental results are provided.

Original languageEnglish
Pages (from-to)941-950
Number of pages10
JournalIEEE Transactions on Circuits and Systems I: Regular Papers
Volume54
Issue number5
DOIs
Publication statusPublished - 1 May 2007

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Keywords

  • Analog filters
  • Least mean square (LMS)
  • Multi-band orthogonal frequency-division multiplexing (MB-OFDM)
  • Notch filters
  • Ultra-wide-band (UWB)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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