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Registered METHOD FOR SELECTING OPTIMAL BEAM AND APPARATUS FOR RECEIVING DIGITAL BROADCASTING SIGNAL USING THE SAME

디지털방송 수신성능개선을 위한 최적의 빔 선택방법 및 그를 이용한 디지털방송수신장치
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Inventors
Kim Ju Yeun, Kim Young Su, Lim Jong Soo, Lee Hyun, Lee Soo In, Jae Hwui Bae
Application No.
11720323 (2005.11.25)
Publication No.
20080205537 (2008.08.28)
Registration No.
7742538 (2010.06.22)
Country
UNITED STATES
Project Code
04MR3100, Development of ATSC 8-VSB diversity receiving technology for mobile and fixed terrestrial DTV receiver, Lim Jong Soo
Abstract
There are provided a method for selecting an optimal beam to improve digital broadcasting receiving performance, and a digital broadcasting receiving apparatus using the same. The method includes the steps of: a) calculating a mainpath Signal to Multipath signal and Noise Ratio (SMNR) based on a channel impulse response for a plurality of beams which are formed according to steering directions from output signals of antennas, wherein the output signal of each antenna has different phase shift according to location of antenna element; b) selecting a predetermined number of beams having a high SMNR value by comparing the calculated SMNR value for respective beam; c) calculating a mainpath Signal to Dominant Multipath signal Ratio (SDMR) based on a channel impulse response corresponding to the selected beam; and d) selecting a beam output signal having the biggest SDMR value by comparing SDMR values calculated in selecting a predetermined number of beams.
KSP Keywords
Digital Broadcasting, Phase shift, antenna elements, channel impulse response(CIR), impulse response, multipath signals, signal and noise