摘要
将高阶差分幅度相移键控调制(MDAPSK)技术与正交频分复用(OFDM)技术相结合,提出了一种应用于水声信道的高阶调制传输体制,以实现水下无线通信高速率数据的有效可靠传输.在分析MDAPSK调制原理的基础上,研究其在OFDM水声通信系统中的应用,仿真和水池试验比对分析了MDAPSK与幅度相移键控调制(APSK)、正交振幅调制(QAM)、差分相移键控调制(DPSK)等不同调制方式的性能,试验结果表明:在未使用纠错编码情况下,采用16DAPSK调制的OFDM水声通信系统有最低的误比特率,无须插入导频进行信道估计,因此具有最高的有效传输速率.验证了MDAPSK调制方式在高阶调制通信系统中综合性能更为优越.
A transmission based on multilevel differential amplitude and phase-shift keying （MDAPSK） and orthogonal frequency division multiplexing （OFDM） was proposed, which was used in underwater acoustic channel and ensured availability and reliability in high bit-rate underwater wireless communication. After describing the schemes of MDAPSK modulation, the application in the OFDM based underwater communication was on a deep research. The bit error rate performance was compared using DAPSK, amplitude and phase shift keying （APSK）, quadrature amplitude modulation （QAM） and differential fhase shift keying （DPSK） multilevel modulation in simulation and pool experimentation. The results show that the OFDM based underwater communication system using 16DAPSK modulation without any error correcting codes has the lowest bit-error rate, and due to no using pilots to estimate the channel, which has the highest transfer rate. The results validate MDAPSK modulation has a better performance in multilevel modulation communication
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第3期20-24,共5页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(51179034
60802060)
黑龙江省自然科学基金资助项目(F201109)
上海交通大学海洋工程国家重点实验室开放课题(批准号:1007)
关键词
水声通信
正交频分复用
差分幅度相移键控
高速率通信
高阶调制
误比特率
underwater communication
orthogonalplitude and phase-shift keying
high biterror-ratefrequency division multiplexing
differential amrate communication
multilevel modulation
bit
