Non-Linear Interference Cancellation Techniques for Electromagnetically Dense Propagation Environments

Ponnekanti, Seshaiah; Sali, S.

doi:10.2528/pier97032600

Cited by 5 publications

(6 citation statements)

References 14 publications

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“…The beamforming technique is widely used in cellular mobile communication systems, in order to optimize the usage of frequency resources [4,27]. Implementing this technique at the base station, co-channel interference and reception of excess multipath fading from undesired directions can be significantly reduced.…”

Section: Simulation Model Descriptionmentioning

confidence: 99%

Uplink Carrier-to-Interference Improvement in a Cellular Telecommunication System When a Six-Beam Switched Parasitic Array Is Implemented

Sotiriou¹,

Trakadas²,

Capsalis³

2008

PIER B

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Abstract-Mobile broadband communication is experiencing rapid growth in the following sections: technology, range of services and marketing target groups. This growth has driven research and development activities towards advanced high-data-rate wireless systems, with improved network performance. A typical example of technology thrust in wireless communications is the use of adaptive antennas at the transceivers, in association with advanced array signal processing. Although the mass deployment of adaptive array systems has not achieved the desired levels yet, there are many examples of improved cell coverage, link quality and system capacity at several networks. The performance of a six-beam switched parasitic array, in terms of carrier-to-interference ratio (CIR) measurement at the uplink direction, is presented in this paper. The switched parasitic array is designed with the aid of the method of genetic algorithms and the simulation results are compared with respect to those obtained when an omni directional antenna is used instead. The calculated CIR improvement reveals the superiority of the adaptive system compared to the conventional one.

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Section: Simulation Model Descriptionmentioning

confidence: 99%

Uplink Carrier-to-Interference Improvement in a Cellular Telecommunication System When a Six-Beam Switched Parasitic Array Is Implemented

Sotiriou¹,

Trakadas²,

Capsalis³

2008

PIER B

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“…But most of researches about the prediction of radio interference have focused mainly on the co-channel interference, and give little attention to the adjacentchannel interference as far as the immunity regulation is concerned. Furthermore, they seldom provide the academic reasoning akin to the analysis and measurement on the enacted regulation [1][2][3][4][5][6][7][8]. However, the scientific basis plays an important role in the field of the low-power radio devices industry.…”

Section: Introductionmentioning

confidence: 99%

Prediction of the Interference Level From a Low-Power Radio Device Provoking the Intermodulation Interference to the Amps Receiver

Kim¹,

Kim²

2009

PIER

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Abstract-In this article, the harmful radiation level of electric field strength from the hostile low-power radio devices causing the intermodulation interference to the AMPS receiver has been predicted. The predicted level becomes the upper limit to avoid the intermodulation interference on the victim device. Our findings show that the quantified upper limit was 79.13 [dBµV/m] to mitigate the adverse influence from these low-power radio devices. Our results are based on the calculation, simulation, and measurement for the commercial AMPS chip. Resulting values are in a good agreement within less than 3 [dB].

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“…In [1], artificial neural networks are applied to signals corrupted by unintentional interference as a non-linear filtering technique. [2] presents a method of antenna pattern synthesis that suppress multiple narrow or wide band interfering signals, while receiving the desired signal by controlling the phase.…”

Section: Introductionmentioning

confidence: 99%

“…The performance of mobile radio communication systems is severely limited by active or passive interference [1,2].…”

Section: Introductionmentioning

confidence: 99%

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Broadband Interference Excision in Spread Spectrum Communication Systems Based on Short-Time Fourier Transformation

Aldırmaz¹,

Durak²

2008

PIER B

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Abstract-An interference excision algorithm in direct-sequence spread spectrum (DS-SS) communication systems is introduced. The proposed excision algorithm is developed for linear frequency modulated (LFM) signals that have broadband frequency characteristics. It is based on the time-frequency analysis of received signals employing short-time Fourier transformation (STFT). To analyze the interference, STFT of the received signal block is evaluated and thresholded. The interference detection is followed by an inverse-STFT computation to estimate the high-power jamming signal. The estimated jammer is then mitigated before demodulation. Simulations present adequate interference estimation results with mean estimation errors less than 0.01%. Various scenarios with different jammer-to-signal ratios (JSRs) and signal-to-noise ratios (SNRs) vs. bit error rates (BERs) are presented for single and multi-component LFM signals. Interference excision algorithms improve the system performance more than an order of magnitude.

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Non-Linear Interference Cancellation Techniques for Electromagnetically Dense Propagation Environments

Cited by 5 publications

References 14 publications

Uplink Carrier-to-Interference Improvement in a Cellular Telecommunication System When a Six-Beam Switched Parasitic Array Is Implemented

Uplink Carrier-to-Interference Improvement in a Cellular Telecommunication System When a Six-Beam Switched Parasitic Array Is Implemented

Prediction of the Interference Level From a Low-Power Radio Device Provoking the Intermodulation Interference to the Amps Receiver

Broadband Interference Excision in Spread Spectrum Communication Systems Based on Short-Time Fourier Transformation

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