TY - GEN
T1 - Multi-frequency DPSK modulation for long-range underwater acoustic communication
AU - Huang, Jianguo
AU - Chen, Yong
AU - Zhang, Qunfei
AU - Shen, Xiaohong
AU - Wang, Fang
PY - 2005
Y1 - 2005
N2 - Long-range shallow water channels are characterized by severe channel fading and low available signal to noise ratio (SNR). In classical underwater acoustic communication systems for above channels, incoherent MFSK modulation, or coherent modulation based on spatial diversity and adaptive equalizations are employed. Although being robustness to fading channels, the incoherent modulation can't solve efficiently the conflict demands between the high signaling rate and reliability. Large receiver arrays may be restricted to be used for some size limited receiver platforms. A novel multi-frequency NDPSK (MFSK-NDPSK) modulation approach for long-range underwater acoustic communications Is presented in this paper which is well suited in shallow water channels. The proposed approach is an efficient combination of MFSK and NDPSK modulation. Signals are NDPSK modulated with multi-carrier frequencies, and the carrier frequencies of adjacent symbols are located in different subbands. Information is transmitted by both frequencies and phases of signals. The theoretical analysis and simulation results are given, and also the experiments in lake was conducted. The results demonstrate that compared with single-carrier modulation, the MFSK-NDPSK modulation can increase data rate in same communication range, or increase the communication range while keeping the same data rate due to input SNR can be increased to improve the performance of decreasing inter-symbol interference and increasing reliability of communication systems.
AB - Long-range shallow water channels are characterized by severe channel fading and low available signal to noise ratio (SNR). In classical underwater acoustic communication systems for above channels, incoherent MFSK modulation, or coherent modulation based on spatial diversity and adaptive equalizations are employed. Although being robustness to fading channels, the incoherent modulation can't solve efficiently the conflict demands between the high signaling rate and reliability. Large receiver arrays may be restricted to be used for some size limited receiver platforms. A novel multi-frequency NDPSK (MFSK-NDPSK) modulation approach for long-range underwater acoustic communications Is presented in this paper which is well suited in shallow water channels. The proposed approach is an efficient combination of MFSK and NDPSK modulation. Signals are NDPSK modulated with multi-carrier frequencies, and the carrier frequencies of adjacent symbols are located in different subbands. Information is transmitted by both frequencies and phases of signals. The theoretical analysis and simulation results are given, and also the experiments in lake was conducted. The results demonstrate that compared with single-carrier modulation, the MFSK-NDPSK modulation can increase data rate in same communication range, or increase the communication range while keeping the same data rate due to input SNR can be increased to improve the performance of decreasing inter-symbol interference and increasing reliability of communication systems.
UR - http://www.scopus.com/inward/record.url?scp=33746877936&partnerID=8YFLogxK
M3 - 会议稿件
AN - SCOPUS:33746877936
SN - 0780391039
SN - 9780780391031
T3 - Oceans 2005 - Europe
SP - 1074
EP - 1077
BT - Oceans 2005 - Europe
T2 - Oceans 2005 - Europe
Y2 - 20 June 2005 through 23 June 2005
ER -