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Backward Compatible Modulation Schemes for Improving Spectrum Efficiency in DAB Systems

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4 Author(s)
Chih-Yang Kao ; Ind. Technol. Res. Inst., Hsinchu ; Ming-Chien Tseng ; Ching-Yung Chen ; Yung-Hua Hung

In this study, a new physical layer transmission technique is proposed with the spectrum efficiency up to two times of that of the Eureka-147 DAB system. The proposed technique comprises the modulation and demodulation schemes. In the modulation, non-uniform-phased 16-level amplitude/phase shift keying (16APSK) is adopted to replace the quadrature-phase-shift-keying (QPSK) in the Eureka 147 DAB system. Besides, in the demodulation, a simpler two-level differential amplitude-shift-keying (2DASK) detector with non-division operation is proposed to achieve low costs of hardware implementation. Furthermore, in order to guarantee backward compatibility of the original DAB receiver, the DQPSK-liked signaling constellation is designed. A software simulation platform is developed using Simulink/Matlab for evaluating the performances of DAB systems in multipath fading channels.

Published in:

Vehicular Technology Conference, 2006. VTC-2006 Fall. 2006 IEEE 64th

Date of Conference:

25-28 Sept. 2006

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