A Numerically Controlled Oscillator for Multi-Carrier Channel Separation in Cdma2000 3X 


Vol. 29,  No. 11, pp. 1271-1277, Nov.  2004


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  Abstract

We propose a fine phase tuner and a rounding processor for a numerically controlled oscillator (NCO), yielding a reduced phase error in generating a digital sine waveform. By using the fine phase tuner presented in this paper, when the ratio of the desired sine wave frequency to the clock frequency is expressed as a fraction, an accurate adjustment in representing the fractional value can be achieved with simple hardware. In addition, the proposed rounding processor reduces the effects of phase truncation on the output spectrum. Logic simulation results of the NCO for multi-carrier channel separation in cdma2000 3X multi-carrier receive system using these techniques show that the noise spectrum and mean square error (MSE) are reduced by 8.68 dB and 5.5 dB, respectively compared to those of truncation method and 2.38 dB and 0.83 dB, respectively, compared to those of Paul's scheme.

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  Cite this article

[IEEE Style]

I. Lim and W. Kim, "A Numerically Controlled Oscillator for Multi-Carrier Channel Separation in Cdma2000 3X," The Journal of Korean Institute of Communications and Information Sciences, vol. 29, no. 11, pp. 1271-1277, 2004. DOI: .

[ACM Style]

In-Gi Lim and Whan-Woo Kim. 2004. A Numerically Controlled Oscillator for Multi-Carrier Channel Separation in Cdma2000 3X. The Journal of Korean Institute of Communications and Information Sciences, 29, 11, (2004), 1271-1277. DOI: .

[KICS Style]

In-Gi Lim and Whan-Woo Kim, "A Numerically Controlled Oscillator for Multi-Carrier Channel Separation in Cdma2000 3X," The Journal of Korean Institute of Communications and Information Sciences, vol. 29, no. 11, pp. 1271-1277, 11. 2004.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880