An approach to analog mitigation of RFI
(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:
https://lup.lub.lu.se/record/336084
- author
- Ödling, Per LU ; Börjesson, Per Ola LU ; Magesacher, T and Nordstrom, T
- organization
- publishing date
- 2002
- 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}}, }