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An adaptive mixed-signal narrowband interference canceller for wireline transmission systems

Magesacher, Thomas LU ; Ödling, Per LU ; Nordström, T.; Lundberg, T.; Isaksson, M. and Börjesson, Per Ola LU (2001) IEEE International Symposium on Circuits and Systems, ISCAS, 2001 In The 2001 IEEE International Symposium on Circuits and Systems, ISCAS 2001. p.450-453
Abstract
Narrowband radio transmitters like radio amateurs and broadcast radio stations are considered to be a serious problem for high-bitrate data transmission over twisted pairs. Due to its high power level, radio frequency interference (RFI) has the potential of overloading the receiver's analog-to-digital converter (ADC). Once the ADC is in saturation, any countermeasure taken in the digital domain will fail, so the problem has to be faced at least partly in the analog domain. This paper proposes an adaptive, mixed-signal, narrowband interference canceller employing a modified recursive least-squares (RLS) algorithm which is split into an analog and a digital part. The mixed-signal approach enables the circuit to generate an... (More)
Narrowband radio transmitters like radio amateurs and broadcast radio stations are considered to be a serious problem for high-bitrate data transmission over twisted pairs. Due to its high power level, radio frequency interference (RFI) has the potential of overloading the receiver's analog-to-digital converter (ADC). Once the ADC is in saturation, any countermeasure taken in the digital domain will fail, so the problem has to be faced at least partly in the analog domain. This paper proposes an adaptive, mixed-signal, narrowband interference canceller employing a modified recursive least-squares (RLS) 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 kHz. The structure is fast enough to prevent the ADC from overloading due to radio amateur interference, thus protecting the data transmission from interruption. Simulation results as well as measurements indicate a practical disturbance rejection potential of about 40-50 dB (Less)
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
The 2001 IEEE International Symposium on Circuits and Systems, ISCAS 2001.
pages
450 - 453
conference name
IEEE International Symposium on Circuits and Systems, ISCAS, 2001
external identifiers
  • scopus:0012865795
ISBN
0-7803-6685-9
DOI
10.1109/ISCAS.2001.922270
language
English
LU publication?
yes
id
575fa4d5-c748-462c-a951-8fa880451755 (old id 1056149)
date added to LUP
2008-04-11 11:11:18
date last changed
2017-08-20 04:53:18
@inproceedings{575fa4d5-c748-462c-a951-8fa880451755,
  abstract     = {Narrowband radio transmitters like radio amateurs and broadcast radio stations are considered to be a serious problem for high-bitrate data transmission over twisted pairs. Due to its high power level, radio frequency interference (RFI) has the potential of overloading the receiver's analog-to-digital converter (ADC). Once the ADC is in saturation, any countermeasure taken in the digital domain will fail, so the problem has to be faced at least partly in the analog domain. This paper proposes an adaptive, mixed-signal, narrowband interference canceller employing a modified recursive least-squares (RLS) 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 kHz. The structure is fast enough to prevent the ADC from overloading due to radio amateur interference, thus protecting the data transmission from interruption. Simulation results as well as measurements indicate a practical disturbance rejection potential of about 40-50 dB},
  author       = {Magesacher, Thomas and Ödling, Per and Nordström, T. and Lundberg, T. and Isaksson, M. and Börjesson, Per Ola},
  booktitle    = {The 2001 IEEE International Symposium on Circuits and Systems, ISCAS 2001.},
  isbn         = {0-7803-6685-9},
  language     = {eng},
  pages        = {450--453},
  title        = {An adaptive mixed-signal narrowband interference canceller for wireline transmission systems},
  url          = {http://dx.doi.org/10.1109/ISCAS.2001.922270},
  year         = {2001},
}