The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
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The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
É apresentado um esquema de cancelamento de interferência (ICAN) para repetidores de rádio de comunicação móvel. Quando um repetidor de rádio tem um ganho maior que o isolamento entre suas antenas de transmissão e recepção, ele oscila devido a sinais de interferência de feedback. Para evitar a oscilação de feedback de um repetidor de rádio, primeiro formulamos um modelo de oscilação de feedback do repetidor de rádio e então derivamos um modelo ICAN desse modelo. A partir do modelo ICAN derivado, mostramos que a estabilidade e a qualidade do sinal do repetidor dependem do ganho e atraso do repetidor, do atraso de propagação nos caminhos de feedback, das características do canal de feedback e da capacidade do algoritmo de estimativa do canal de feedback. Também é mostrado que a condição de estabilidade do repetidor não garante a qualidade do sinal de saída do repetidor. Para garantir a estabilidade e a qualidade do sinal do repetidor, um esquema ICAN baseado em um algoritmo iterativo é posteriormente proposto. Os resultados da simulação confirmam a relação entre a estabilidade e a qualidade do sinal do repetidor e o impacto dos fatores acima mencionados. Usando o esquema ICAN proposto, foi alcançada uma magnitude média do vetor de erro (indicador de qualidade) de cerca de 6.3% para o sinal de saída do repetidor.
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Moohong LEE, Byungjik KEUM, Young Serk SHIM, Hwang Soo LEE, "An Interference Cancellation Scheme for Mobile Communication Radio Repeaters" in IEICE TRANSACTIONS on Communications,
vol. E92-B, no. 5, pp. 1778-1785, May 2009, doi: 10.1587/transcom.E92.B.1778.
Abstract: An interference cancellation (ICAN) scheme for mobile communication radio repeaters is presented. When a radio repeater has a gain that is larger than the isolation between its transmit and receive antennas, it oscillates due to feedback interference signals. To prevent feedback oscillation of a radio repeater, we first formulate a feedback oscillation model of the radio repeater and then derive an ICAN model from that model. From the derived ICAN model, we show that the stability and the signal quality of the repeater depend on the repeater's gain and delay, the propagation delay on feedback paths, feedback channel characteristics, and the capability of the feedback channel estimation algorithm. It is also shown that the stability condition of the repeater does not guarantee the quality of the repeater's output signal. To guarantee repeater's stability and signal quality, an ICAN scheme based on an iterative algorithm is subsequently proposed. The simulation results confirm the relationship between the stability and signal quality of the repeater and the impact of the aforementioned factors. Using the proposed ICAN scheme, a mean error vector magnitude (quality indicator) of about 6.3% for the repeater's output signal was achieved.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.E92.B.1778/_p
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@ARTICLE{e92-b_5_1778,
author={Moohong LEE, Byungjik KEUM, Young Serk SHIM, Hwang Soo LEE, },
journal={IEICE TRANSACTIONS on Communications},
title={An Interference Cancellation Scheme for Mobile Communication Radio Repeaters},
year={2009},
volume={E92-B},
number={5},
pages={1778-1785},
abstract={An interference cancellation (ICAN) scheme for mobile communication radio repeaters is presented. When a radio repeater has a gain that is larger than the isolation between its transmit and receive antennas, it oscillates due to feedback interference signals. To prevent feedback oscillation of a radio repeater, we first formulate a feedback oscillation model of the radio repeater and then derive an ICAN model from that model. From the derived ICAN model, we show that the stability and the signal quality of the repeater depend on the repeater's gain and delay, the propagation delay on feedback paths, feedback channel characteristics, and the capability of the feedback channel estimation algorithm. It is also shown that the stability condition of the repeater does not guarantee the quality of the repeater's output signal. To guarantee repeater's stability and signal quality, an ICAN scheme based on an iterative algorithm is subsequently proposed. The simulation results confirm the relationship between the stability and signal quality of the repeater and the impact of the aforementioned factors. Using the proposed ICAN scheme, a mean error vector magnitude (quality indicator) of about 6.3% for the repeater's output signal was achieved.},
keywords={},
doi={10.1587/transcom.E92.B.1778},
ISSN={1745-1345},
month={May},}
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TY - JOUR
TI - An Interference Cancellation Scheme for Mobile Communication Radio Repeaters
T2 - IEICE TRANSACTIONS on Communications
SP - 1778
EP - 1785
AU - Moohong LEE
AU - Byungjik KEUM
AU - Young Serk SHIM
AU - Hwang Soo LEE
PY - 2009
DO - 10.1587/transcom.E92.B.1778
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E92-B
IS - 5
JA - IEICE TRANSACTIONS on Communications
Y1 - May 2009
AB - An interference cancellation (ICAN) scheme for mobile communication radio repeaters is presented. When a radio repeater has a gain that is larger than the isolation between its transmit and receive antennas, it oscillates due to feedback interference signals. To prevent feedback oscillation of a radio repeater, we first formulate a feedback oscillation model of the radio repeater and then derive an ICAN model from that model. From the derived ICAN model, we show that the stability and the signal quality of the repeater depend on the repeater's gain and delay, the propagation delay on feedback paths, feedback channel characteristics, and the capability of the feedback channel estimation algorithm. It is also shown that the stability condition of the repeater does not guarantee the quality of the repeater's output signal. To guarantee repeater's stability and signal quality, an ICAN scheme based on an iterative algorithm is subsequently proposed. The simulation results confirm the relationship between the stability and signal quality of the repeater and the impact of the aforementioned factors. Using the proposed ICAN scheme, a mean error vector magnitude (quality indicator) of about 6.3% for the repeater's output signal was achieved.
ER -