• Title/Summary/Keyword: Soft-Decision Decoding

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Performance Evaluation of Reverse Link for Speech and Data Traffic ini CDMA-Based IMT-2000 System (CDMA 방식의 IMT-2000 시스템에서 음성 및 데이터 트래픽에 대한 역방향링크의 성능 평가)

  • Lee, Hyun;Kang, Bob-Joo;You, Young-Gap;Cho, Kyoung-Rok
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.11 no.4
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    • pp.657-665
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    • 2000
  • In this study, the bit error rate(BER) performance for the speech and data traffic is evaluated by results of the reverse link simulation of CDMA-based IMT-2000. Simulations in the reverse link are achieved for indoor, pedestrian, and vehicular environments, which are provided by ITU-R . Also, in the these simulations, the fast power control of 1.6kHz rate is applied. The amplitude and phase of the fading signal are estimated by using the 5-tap FIR filter, and the soft-decision Viterbi and Reed-Solomon (RS) decoding are applied. Simulation results provide the optimum ratio of pilot power to traffic power, the BER performance according to the number of fingers, and performance comparison between convolutional code and concatenated code at $10^-6$ BER in 5 MHz system.

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