Low signal-to-noise-ratio underwater acoustic communications using direct-sequence spread-spectrum signals
Low signal-to-noise-ratio underwater acoustic communications using direct-sequence spread-spectrum signals
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DOI：
10.1109/oceanse.2007.4302213
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发表时间：
2007-06
期刊：
影响因子：
--
通讯作者：
T.C. Yang;Wen-Bin Yang
中科院分区：
文献类型：
--
作者：
T.C. Yang;Wen-Bin Yang
Direct sequence spread spectrum (DSSS) uses a code sequence to spread the symbols at the transmitter and a de-spreader at the receiver to recover the transmitted symbols. The de-spreader via a correlator or a matched filter provides a processing gain (matched filter gain) which enhances the symbol energy over noise thus allowing communications at low input signal-to-noise ratio. This paper analyzes DSSS data collected during the TREX04 experiment and determine the bit error rate as a function of input SNR The data analyzed cover a total of 1160 packets with input SNR ranging from 23 dB to as low as -15 dB.
