A Variable-Rate Spread-Spectrum System for Underwater Acoustic Communications

作者：He Chengbing^*; Huang Jianguo; Ding Zhi

来源：IEEE Journal of Oceanic Engineering, 2009, 34(4): 624-633.

DOI：10.1109/JOE.2009.2030222

• Bidirectional decision feedback equalization (BiDFE)
• complementary code keying (CCK)
• intersymbol interference (ISI)
• underwater acoustic (UWA) communication
• union bound
• variable rate

A key research area in underwater acoustic (UWA) communication is the development of advanced modulation and detection schemes for improved performance and range-rate product. In this communication, we propose a variable-rate underwater data transmission system based on direct sequence spread spectrum (DSSS) and complementary code keying (CCK), particularly for shallow-water acoustic channels with severe multipath propagation. We provide a suboptimum receiver that consists of a bidirectional decision feedback equalizer (BiDFE) to cancel both postcursor and precursor intersymbol interference (ISI). We also develop iterative signal processing and time-reversal (TR) diversity processing to mitigate the effect of error propagation in BiDFE. We present performance analysis on bit error rate (BER) for different data rates. Our works show that this new variable-data-rate DSSS-CCK is a suitable candidate for UWA communications over varying channel conditions and distance.

• 出版日期2009-10
• 单位西北工业大学