Proceedings of the IEEK Conference (대한전자공학회:학술대회논문집)

The Institute of Electronics and Information Engineers (대한전자공학회)
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BER DEGRADATION DUE TO THE PHASE NOISE SPECTRAL SHAPE IN LMDS SYSTEMS

  • Kim, Youngsun (Department of Information and Communications, K-JIST) ;
  • Song, Jong-In (Department of Information and Communications, K-JIST) ;
  • Kim, Kiseon (Department of Information and Communications, K-JIST)
  • Published : 2000.07.01
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Abstract

Phase noise of oscillator gives the performance degradation significantly when a high carrier frequency and low transmission rate are used. The BER(Bit Error Rates) degradation of QPSK(Quadrature Phase Shift Keying) transmission is analyzed with the oscillator phase noise level specified in downstream physical interface of LMDS(Local Multipoint Distribution Services) which is described in DAVIC(Digital Audio Visual Council). The model used for the phase noise is a power-law model. We also investigated the effects of the various transmission rates on system performance. For the transmission rate below 0.5 Mbps, the BER performance is severely degraded and we verified that the transmission rate, 20 Mbps, is adequate for the downstream of LMDS systems.

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