Smart antenna algorithm for CDMA downlink beam-forming 


Vol. 30,  No. 7, pp. 603-610, Jul.  2005


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  Abstract

Beam-forming method based on the estimated channel information at the base station degrade the performance mismatching directional vector in case of systems which Frequency Division Duplex (FDD) center frequency of uplink and downlink are different. Also blind estimation technique which is to obtain directional vector of reverse link through received signal has disadvantage of hardware complexity increase. To solve these problems, in present paper, a smart antenna algorithm which is to improve the beam-forming complexity increase due to user number by appling the spatial fourier transform to be able to beam-forming toward a wanted direction through adjusting a obtained uplink weight function by estimating Angle-of-Arrival (AoA) to the competable form at the downlink is proposed. The proposed algorithm is integrated to the CDMA downlink transmitter and simulations are performed to confirm the performance as frame error rate at the receiver. As a result, the beam forming effect is confirmed and the performance gain with the proposed algorithm is comparable to ordinary smart antenna system.

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  Cite this article

[IEEE Style]

C. Ahn, Y. Hong, Y. Jin, J. Ahn, "Smart antenna algorithm for CDMA downlink beam-forming," The Journal of Korean Institute of Communications and Information Sciences, vol. 30, no. 7, pp. 603-610, 2005. DOI: .

[ACM Style]

Chijun Ahn, Youngmi Hong, Younghwan Jin, and Jaemin Ahn. 2005. Smart antenna algorithm for CDMA downlink beam-forming. The Journal of Korean Institute of Communications and Information Sciences, 30, 7, (2005), 603-610. DOI: .

[KICS Style]

Chijun Ahn, Youngmi Hong, Younghwan Jin, Jaemin Ahn, "Smart antenna algorithm for CDMA downlink beam-forming," The Journal of Korean Institute of Communications and Information Sciences, vol. 30, no. 7, pp. 603-610, 7. 2005.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880