Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

An approach to analog mitigation of RFI

Ödling, Per LU ; Börjesson, Per Ola LU ; Magesacher, T and Nordstrom, T (2002) In IEEE Journal on Selected Areas in Communications 20(5). p.974-986
Abstract
Among all noise sources present in wireline transmission systems we focus on one special type: narrowband radio frequency interference generated by radio amateurs (HAM) and broadcast radio stations. This disturbance, characterized by high power and narrow bandwidth, has the potential of overloading the receiver's analog-to-digital converter (ADC). Once the ADC is in saturation, any countermeasure taken in digital domain will fail. A viable way to face this problem is cancellation using the common-mode signal as a reference. This paper describes in detail an adaptive, mixed-signal, narrowband interference canceller employing a modified recursive least-squares algorithm, which is split into an analog and a digital part. The mixed-signal... (More)
Among all noise sources present in wireline transmission systems we focus on one special type: narrowband radio frequency interference generated by radio amateurs (HAM) and broadcast radio stations. This disturbance, characterized by high power and narrow bandwidth, has the potential of overloading the receiver's analog-to-digital converter (ADC). Once the ADC is in saturation, any countermeasure taken in digital domain will fail. A viable way to face this problem is cancellation using the common-mode signal as a reference. This paper describes in detail an adaptive, mixed-signal, narrowband interference canceller employing a modified recursive least-squares algorithm, which is split into an analog and a digital part. The mixed-signal approach enables the circuit to generate an interference-cancelling signal of several MHz while operating the adaptive algorithm at some kilohertz. Simulation as well as measurement results show a steady-state disturbance suppression of about 35 dB. The convergence speed is high enough to protect the ADC from overloading due to time-variant HAM interference. (Less)
Please use this url to cite or link to this publication:
author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
radio frequency interference, cancellation, interference mitigation
in
IEEE Journal on Selected Areas in Communications
volume
20
issue
5
pages
974 - 986
publisher
IEEE - Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • wos:000176008600011
  • scopus:0036601303
ISSN
1558-0008
DOI
10.1109/JSAC.2002.1007379
language
English
LU publication?
yes
id
80c5c498-acbe-445e-8918-f03cda4fbd83 (old id 336084)
date added to LUP
2016-04-01 16:09:03
date last changed
2022-02-05 06:11:49
@article{80c5c498-acbe-445e-8918-f03cda4fbd83,
  abstract     = {{Among all noise sources present in wireline transmission systems we focus on one special type: narrowband radio frequency interference generated by radio amateurs (HAM) and broadcast radio stations. This disturbance, characterized by high power and narrow bandwidth, has the potential of overloading the receiver's analog-to-digital converter (ADC). Once the ADC is in saturation, any countermeasure taken in digital domain will fail. A viable way to face this problem is cancellation using the common-mode signal as a reference. This paper describes in detail an adaptive, mixed-signal, narrowband interference canceller employing a modified recursive least-squares algorithm, which is split into an analog and a digital part. The mixed-signal approach enables the circuit to generate an interference-cancelling signal of several MHz while operating the adaptive algorithm at some kilohertz. Simulation as well as measurement results show a steady-state disturbance suppression of about 35 dB. The convergence speed is high enough to protect the ADC from overloading due to time-variant HAM interference.}},
  author       = {{Ödling, Per and Börjesson, Per Ola and Magesacher, T and Nordstrom, T}},
  issn         = {{1558-0008}},
  keywords     = {{radio frequency interference; cancellation; interference mitigation}},
  language     = {{eng}},
  number       = {{5}},
  pages        = {{974--986}},
  publisher    = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}},
  series       = {{IEEE Journal on Selected Areas in Communications}},
  title        = {{An approach to analog mitigation of RFI}},
  url          = {{http://dx.doi.org/10.1109/JSAC.2002.1007379}},
  doi          = {{10.1109/JSAC.2002.1007379}},
  volume       = {{20}},
  year         = {{2002}},
}