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A New DS/DPSK Underwater Acoustic Communication System
| Content Provider | Semantic Scholar |
|---|---|
| Author | Zhang, Gangqiang Dong, Yangze |
| Copyright Year | 2015 |
| Abstract | For DS/DPSK, carrier synchronization is not necessary in the receiver end, it outperforms DS/PSK systems respect to anti-frequency shift and anti-phase-jitter ability in phase changing shallow water channels, thus is considered as a robust modulation scheme in shallow water mid- and long-range acoustic communications. Traditional M-ary DSSS systems adopt difference of spread sequence, at the receiver end, differential demodulation is carried out first, and then de-spread process is performed, this method results in degradation of anti-noise performance as spreading gain was not utilized during demodulation stage. A novel differential direct sequence spread spectrum system, in which receiving bit decision was made based on sign of peak value of multiplication result of in-phase and quadrature-phase channel cross-correlation functions, is proposed in this paper. This new method is suitable for use in M-ary DSSS systems. The superior performance of this new method compared to traditional differential M-ary DSSS system in Rayleigh fading and phase fluctuating channels was valid via computer simulation. |
| File Format | PDF HTM / HTML |
| DOI | 10.2991/iiicec-15.2015.374 |
| Alternate Webpage(s) | https://download.atlantis-press.com/article/17260.pdf |
| Alternate Webpage(s) | https://doi.org/10.2991/iiicec-15.2015.374 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
