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

Dang Hai PHAM  Takanobu TABATA  Hirokazu ASATO  Satoshi HORI  Tomohisa WADA  

Publication
IEICE TRANSACTIONS on Communications   Vol.E89-B   No.12   pp.3215-3224
Publication Date: 2006/12/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e89-b.12.3215
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Software Defined Radio Technology and Its Applications)
Category: 
Keyword: 
array antenna,  OFDM,  ISDB-T,  MRC,  SMI,  FPGA,  DSP,  

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Summary: 
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.