Design of Downlink Beamforming Transmitter in OFDMA/ TDD system 


Vol. 31,  No. 5, pp. 493-500, May  2006


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  Abstract

This paper presents the efficient structure and parameter optimization of downlink beamforming transmitter in OFDMA/TDD system. To design downlink beamforming transmitter for multiple transmit antennas, an efficient beamforming structure for multiple users and the choice of word-length of each block are critical in the aspect of its performance and hardware complexity. We propose an efficient beamforming scheme, which stores the weights of subcarriers into memory without user identification at the receiver of base station and calculates the weights for corresponding user in a subcarrier unit of IFFT input at high speed. Also, we obtain the word-length of main data path and other design parameters by fixed-point simulation analysis. The proposed architecture could reduce the memory size proportional to the maximum number of users per frame, and the processing time of an OFDM symbol at the receiver of base station without the need of additional processing time for calculating the weights at the transmitter.

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  Cite this article

[IEEE Style]

H. Park, Y. Park, C. Kim, "Design of Downlink Beamforming Transmitter in OFDMA/ TDD system," The Journal of Korean Institute of Communications and Information Sciences, vol. 31, no. 5, pp. 493-500, 2006. DOI: .

[ACM Style]

Hyeong-Sook Park, Youn-Ok Park, and Cheol-Sung Kim. 2006. Design of Downlink Beamforming Transmitter in OFDMA/ TDD system. The Journal of Korean Institute of Communications and Information Sciences, 31, 5, (2006), 493-500. DOI: .

[KICS Style]

Hyeong-Sook Park, Youn-Ok Park, Cheol-Sung Kim, "Design of Downlink Beamforming Transmitter in OFDMA/ TDD system," The Journal of Korean Institute of Communications and Information Sciences, vol. 31, no. 5, pp. 493-500, 5. 2006.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880