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- W894170819 abstract "Aimed at the conventional serial communication system fails when the channel was frequency-selective,long delay and multi-paths effect,resulting in inter-symbol-interference( ISI),an iterative system for underwater acoustic communication( UWAC) was proposed,which employed iterative differential detection and spread spectrum technique. The proposed scheme adopts π /4-DQPSK soft demodulation to overcome the difficulty of phase ambiguity. For suppression of ISI in UWAC,joint demodulation and decoding iteration was used. The communication scheme has the characteristic of long communication range at low SNR,and the maximum range is up to 100 km. The theoretic analysis and simulation results show that the proposed scheme outperforms traditional serial one. When SNR is- 6 dB,after four joint iterations,compared with serial scheme,BER can decrease from 10- 2to 10- 5." @default.
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- W894170819 date "2013-01-01" @default.
- W894170819 modified "2023-10-12" @default.
- W894170819 title "LDPC Coded DQPSK Modulation with Iterative Detection Method for Underwater Acoustic Communications" @default.
- W894170819 hasPublicationYear "2013" @default.
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