• Title/Summary/Keyword: 다중대역 OFDM 방식 초광대역 통신방식

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An analysis of link margin for MB-OFDM UWB system in multi-path channel (다중 경로 채널에서의 MB-OFDM UWB 시스템 링크 마진 분석)

  • Shin, Cheol-Ho;Choi, Sang-Sung;Pack, Jeong-Ki
    • The KIPS Transactions:PartC
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    • v.13C no.6 s.109
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    • pp.677-684
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    • 2006
  • This paper investigates the link margin of MB-OFDM UWB system quantitatively. Various simulations are performed considering the implementation loss by imperfect synchronization unit and the effect of multi-path fading channels. MB-OFDM UWB system uses ZP(Zero Padding) instead of CP(Cyclic Prefix) and supports two transmission modes; one is TFI(Time Frequency Interleaving) mode that transmits OFDM symbols using different carrier frequency from symbol to symbol according to Time Frequency(TF) codes, the other is FFI(Fixed Frequency Interleaving) mode that transmits OFDM symbols using a specific carrier frequency. The advantage of if and TFI is to be able to increase the transmitting power effectively compared to the existed OFDM systems that transmit the signal continuously at the same average transmitting power. From the analysis results of Ink margin, to guarantee the service range of 4m in 200Mbps mode, TFI mode must necessarily be implemented and the service range of 480Mbps mode is estimated about 1-2m in the line-of-sight multi-path channel (CMI).