Design of Lock Detector for W-CDMA System 


Vol. 27,  No. 5, pp. 425-431, May  2002


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  Abstract

This paper provides the structure and the parameter-optimization method for the lock detector's estimator of received chip-energy-per-interference-power-spectral-density (Ec/lo), as the decision variable for determining whether the demodulation's path time offset is correct ("lation unlock") in multi-path propagation wirelessdemodulation lock") or is not correct ("demodu channel with time-variant power distribution profile. We also analyze the bit-error-rate (BER) change as the parameter's values change in AWGN, Rayleigh, and birth-death propagation channel model. By the analysis, we know that the proposed estimator is unbiased at A WGN, but biased at Rayleigh, and so we should determine the design parameters such as detection threshold or loop filter's forgetting factor by considering the bias loss. Finally, we showed BER improvement through this parameter optimization process.

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  Cite this article

[IEEE Style]

S. H. Won and W. W. Kim, "Design of Lock Detector for W-CDMA System," The Journal of Korean Institute of Communications and Information Sciences, vol. 27, no. 5, pp. 425-431, 2002. DOI: .

[ACM Style]

Seok H. Won and Whan Woo Kim. 2002. Design of Lock Detector for W-CDMA System. The Journal of Korean Institute of Communications and Information Sciences, 27, 5, (2002), 425-431. DOI: .

[KICS Style]

Seok H. Won and Whan Woo Kim, "Design of Lock Detector for W-CDMA System," The Journal of Korean Institute of Communications and Information Sciences, vol. 27, no. 5, pp. 425-431, 5. 2002.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880