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IEICE Transactions on Communications 2006 E89-B(12):3215-3224; doi:10.1093/ietcom/e89-b.12.3215
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Copyright © 2006 The Institute of Electronics, Information and Communication Engineers

Special Section on Software Defined Radio Technology and Its Applications -- Papers

Joint Hardware-Software Implementation of Adaptive Array Antenna for ISDB-T Reception

Dang Hai PHAM1, Takanobu TABATA2, Hirokazu ASATO3, Satoshi HORI2 and Tomohisa WADA1,3

1 The authors are with the Faculty of Engineering, Dept. of Information Engineering, Univ. of the Ryukyus, Okinawa-ken, 903-0213 Japan. E-mail: phdang{at}lsi.ie.u-ryukyu.ac.jp, 2 The authors are with Kojima Press Industry Co., Ltd., Aichi-ken, 470-0207 Japan., 3 The authors are with Magna Design Net Inc., Okinawa-ken, 901-0152 Japan.


  Abstract

In this paper, an adaptive array antenna is implemented to enhance the performance of digital TV ISDB-T reception. Issues of realizing the proposed array antenna and its implementation by a joint hardware-software solution are also presented in this paper. Instead of using known reference signals, the proposed method utilizes the GI (Guard Interval) and a periodic property of OFDM signal as a constraint to realize MRC (Maximum Ratio Combining) and SMI (Sample Matrix Inversion) adaptive beam-forming algorithms. Experimental results show that the proposed system drastically improves the quality of reception. Moreover, the proposed system can achieve excellent performance under the conditions of strong interferences.

Key Words: array antenna, OFDM, ISDB-T, MRC, SMI, FPGA, DSP

Manuscript received March 27, 2006. Manuscript revised June 30, 2006.


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