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Conference Paper Research on simple QPSK demodulation method in hierarchically modulated T-DMB system with DQPSK-QPSK
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Authors
Jae Hwui Bae, Young Su Kim, Ju-Yeon Kim, Jong Soo Lim, Soo In Lee, Dong-Soeg Han
Issue Date
2008-03
Citation
International Symposium on Broadband Multimedia Systems and Broadcasting (BMSB) 2008, pp.1-5
Publisher
IEEE
Language
English
Type
Conference Paper
DOI
https://dx.doi.org/10.1109/ISBMSB.2008.4536645
Abstract
We propose a simple QPSK demodulation method in hierarchically modulated T-DMB with DQPSK and QPSK. For the T-DMB system based on OFDM with DQPSK modulation, the data rate can be increased with hierarchical modulation by adding QPSK signal to existing DQPSK signal. The newly added QPSK can be restored with simple DQPSK signal estimation, which uses differential demodulation of DQPSK signal. We show the performance of a proposed method in mobile channel and static channels.
KSP Keywords
Demodulation method, Differential demodulation, Mobile channel, QPSK signal, data rate, hierarchical modulation, signal estimation