상세정보
학술대회
DQPSK-QResearch on Simple QPSK Demodulation Method in Hierarchically Modulated T-DMB System with DQPSK-QPSK
- 발행일
- 200803
- 출처
- International Symposium on Broadband Multimedia Systems and Broadcasting (BMSB) 2008, pp.1-5
- 협약과제
- 08MR3700, 지상파 DMB 전송 고도화 기술개발, 임종수
- 초록
- 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 제안 키워드
- Demodulation method, Differential demodulation, Hierarchical modulation, Mobile channel, QPSK signal, data rate, signal estimation