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

Författare:
Publiceringsår: 2001
Språk: Engelska
Sidor: IV450-IV453
Publikation/Tidskrift/Serie: The 2001 IEEE International Symposium on Circuits and Systems, ISCAS 2001.
Dokumenttyp: Konferensbidrag

Sammanfattning

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

Disputation

Nyckelord

  • Technology and Engineering

Övriga

The 2001 IEEE International Symposium on Circuits and Systems, ISCAS 2001.
2001-05-06/2001-05-09
Sydney, NSW, Australia
Published
Yes
"This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder."
  • ISBN: 0-7803-6685-9

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