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- W2023218127 abstract "Information is carried by the time delay between adjacent code elements in differential pattern time delay shift coding system. It has an ability of anti inter-symbol interference and the Doppler effects. In order to obtain higher communication rate and reduce the interference between channels, this paper proposes a dual-channel orthogonal modulation differential pattern time delay shift coding underwater acoustic communication method and selects the balance Gold sequence as Patterns. At the transmitter end, divide input bits into two channels to differential pattern time delay shift encode and modulate orthogonally. Then add the encoded signal of two channels together to transmit. At the receiver end, demodulate the received signal orthogonally, search the correlation peak position of patterns. And estimate time delay to restore the original input information. Dual parallel channel transmission mode effectively improves communication rate of differential Pattern time delay shift coding and the orthogonal modulation method greatly reduces the interference between channels. Simulation research is carried on for the method, at transmission data 2x104bit and SNR -5dB, information is recovered at a communication rate 205 bit/s with very low bit error rate." @default.
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- W2023218127 date "2013-11-01" @default.
- W2023218127 modified "2023-09-22" @default.
- W2023218127 title "Dual-channel orthogonal modulation differential pattern time delay shift coding underwater acoustic communication method" @default.
- W2023218127 doi "https://doi.org/10.1121/1.4831102" @default.
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