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http://dx.doi.org/10.5909/JBE.2015.20.1.3

Study on Improved Polarized 2˟2 MIMO Spatial Multiplexing Method for DVB-NGH System  

Seo, Jae Hyun (Broadcasting Systems Research Department, Elecktronics and Telecommunications Research Institute)
Kim, Heung Mook (Broadcasting Systems Research Department, Elecktronics and Telecommunications Research Institute)
Han, Dong Seog (School of Electronics Engineering, Kyungpook National University)
Publication Information
Journal of Broadcast Engineering / v.20, no.1, 2015 , pp. 3-15 More about this Journal
Abstract
Recently terrestrial digital broadcasting systems have experienced a growth with the demand of high data rate. In order to meet such demand, the MIMO technology has received a wide attention. This paper proposes a pre-coding method, which provides high space channel correlation for the improved performance over terrestrial broadcasting channels when the polarized $2{\times}2$ MIMO SM is adopted for DVB-NGH systems. When signals with two different modulation orders are transmitted through two antennas, a method that is based on non-uniform power is also proposed for improved reception performance. To optimize the proposed method, phase shifting values for the pre-coding method and appropriate unequal power ratio are obtained. These obtained parameters are applied to a terrestrial broadcasting system, and then the performance improvement over the conventional SM is shown through computer simulations.
Keywords
DVB-NGH; OFDM; MIMO; terrestrial; spatial multiplexing;
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