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[Keyword] multi-stage tracking(1hit)

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  • The Modified CP-AFC with Multi-Stage Tracking Mode for WCDMA Reverse Link Receiver

    Joo-Hyun DO  Young-Yong LEE  Hyung-Jin CHOI  

     
    PAPER

      Vol:
    E86-A No:6
      Page(s):
    1397-1404

    In this paper, we propose a modified CP-AFC (Cross-Product Automatic Frequency Control) algorithm to enhance coherent signal detection for WCDMA reverse link receiver. We introduce a moving average filter at the FDD input to decrease the noise effect by increasing the number of cross-products, since pilot symbol in WCDMA is not transmitted continuously. We also add normalization algorithm to overcome the conventional CP-FDD's sensitivity to the variance of input signal amplitude and to increase the linear range of S-curve. For rapid frequency acquisition and tracking, we adopt a multi-stage tracking mode. We applied the proposed algorithm in the implementation of WCDMA base station modem successfully.