Interpolation-Based Interference Rejection Combining for Black-Space Cognitive Radio in Time-Varying Channels
| Autor: | Markku Renfors, Sudharsan Srinivasan, Sener Dikmese |
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| Přispěvatelé: | Bader, Faouzi, Kryszkiewicz, Pawel, Dimitriou, Nikos, Kliks, Adrian, Sybis, Michal, Triantafyllopoulou, Dionysia, Caicedo, Carlos E., Sezgin, Aydin, Tampere University, Electrical Engineering, Research group: Wireless Communications and Positioning |
| Rok vydání: | 2019 |
| Předmět: |
Covariance function
Frequency band Computer science Orthogonal frequency-division multiplexing 213 Electronic automation and communications engineering electronics 010401 analytical chemistry Spectral density 020206 networking & telecommunications 02 engineering and technology Interference (wave propagation) 01 natural sciences Subcarrier 0104 chemical sciences Cognitive radio 0202 electrical engineering electronic engineering information engineering Electronic engineering Communication channel |
| Zdroj: | Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering ISBN: 9783030257477 CrownCom |
| DOI: | 10.1007/978-3-030-25748-4_13 |
| Popis: | In this paper, we investigate multi-antenna interference rejection combing (IRC) based black-space cognitive radio (BS-CR) operation in time-varying channels. The idea of BS-CR is to transmit secondary user (SU) signal in the same frequency band with the primary user (PU) such that SU’s power spectral density is clearly below that of the PU, and no significant interference is inflicted on the PU receivers. We explore the effects of interpolation and mobility on the novel blind IRC technique which allows such operation mode for effective reuse of the PU spectrum for relatively short-distance CR communication. We assume that both the PU system and the BS-CR use orthogonal frequency division multiplexing (OFDM) waveforms with common numerology. In this case the PU interference on the BS-CR signal is strictly flat-fading at subcarrier level. Sample covariance matrix-based IRC adaptation is applied during silent gaps in CR operation. We propose an interpolation-based scheme for tracking the spatial covariance in time-varying channels, demonstrating significantly improved robustness compared to the earlier scheme. The performance of the proposed IRC scheme is tested considering terrestrial digital TV broadcasting (DVB-T) as the primary service. The resulting interference suppression capability is evaluated with different PU interference power levels, silent gap durations, data block lengths, and CR device mobilities. acceptedVersion |
| Databáze: | OpenAIRE |
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