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Sökning: WFRF:(Trojer Elmar)

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  • Ramalho, Leonardo, et al. (författare)
  • An LPC-based fronthaul compression scheme
  • 2017
  • Ingår i: IEEE Communications Letters. - 1089-7798. ; 21:2, s. 318-321
  • Tidskriftsartikel (refereegranskat)abstract
    • Several new architectures are under investigation for cloud radio access networks, assuming distinct splits of functionality among the network elements. Consequently, the research on radio data compression for the fronthaul is based on assumptions that correspond to a wide variety of tradeoffs among data rate, signal distortion, latency, and computational cost. This letter describes a method for LTE downlink point-topoint signal compression based on linear prediction and Huffman coding, which is suitable for low cost encoding and decoding units with stringent restrictions on power consumption. The proposed method can work at various compression factors, such as 3.3:1 at an average EVM of 0.9%, or 4:1 at an average EVM of 2.1%.
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  • Zampolo, Ronaldo de Freitas, et al. (författare)
  • Mapping The Impulse Noise Spectral Features From Waveform Domain Onto Symbol Domain
  • 2006
  • Ingår i: 6th International Telecommunications Symposium. - 9788589748049 ; , s. 193-197
  • Konferensbidrag (refereegranskat)abstract
    • In this paper the spectral features of impulse noise in DSL systems are mapped from the waveform domain onto the symbol domain, considering a QAM receiver. This work can be viewed as part of a full symbol domain model for impulse noise, which should include the amplitude and spectral aspects. Since the available models of impulse noise in DSL are generally waveform-based, this kind of mapping is justified when symbol-based simulations are intended, in order to avoid computational overhead due to demodulating noise samples generated on waveform domain. The analytical development of such mapping is provided as well as some simulation results.
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  • Resultat 1-6 av 6

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