차세대 DAB 및 지상파 DMB 시스템을 위한 새로운 비트 매핑 및 파일럿 설계

Hierarchical modulation is considered to provide higher data rate for the next-generation DAB/T-DMB, maintaining backward compatibility to the conventional DAB/T-DMB. Since dedicated pilots are not available due to the backward compatibility, channel estimation is the most critical issue for demodulation of the hierarchically modulated signal. In this paper, a non-Gray bit mapping scheme is proposed for the next-generation DAB/T-DMB receivers with low complexity and power consumption.