Impacts of narrowband interference on OFDM-UWB receivers: Analysis and mitigation

Kai Shi, Yi Zhou, Burak Kelleci, Timothy W. Fischer, Erchin Serpedin, Aydin Ilker Kaŗilayan

Research output: Contribution to journalArticle

74 Citations (Scopus)

Abstract

Orthogonal frequency-division multiplexing (OFDM)-based ultra-wide-band (UWB) transceivers hold the promise to revolutionize the next generation of short-range wireless networks and to be adopted in electronics products for both civil and military applications. For the UWB transceivers to coexist with nearby devices, it is necessary to design efficient UWB receivers whose operation is robust to narrowband interferences (NBI). This paper conducts an in-depth analysis to establish the impacts of NBI on the performance of an OFDM-UWB receiver. A comprehensive study to assess the effects of NBI on the quantization noise in the analog-to-digital converter (ADC), timing, and carrier acquisition is presented. The analytical results show that the efficiency of the ADC is degraded by NBI, although this problem could be slightly remedied by an adaptive autogain controller (AGC). It is also found that, compared with the conventional autocorrelation- based acquisition scheme, the pseudonoise (PN) sequence matched-filtering-based acquisition scheme presents higher robustness to NBI. Nevertheless, both these two acquisition schemes fail at high interference levels. As a conclusion, it is critical to develop novel and low-complexity NBI mitigation schemes for OFDM-UWB receivers that take into account the impacts introduced by NBI.

Original languageEnglish
Pages (from-to)1118-1128
Number of pages11
JournalIEEE Transactions on Signal Processing
Volume55
Issue number3
DOIs
Publication statusPublished - 1 Mar 2007

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Keywords

  • Analog-to-digital converter (ADC)
  • Carrier frequency offset
  • Narrowband interference
  • Orthogonal frequency-division multiplexing (OFDM)
  • Quantization noise
  • Timing synchronization
  • Ultra-wide-band

ASJC Scopus subject areas

  • Signal Processing
  • Electrical and Electronic Engineering

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