一种新的脉冲联合调制水声通信方法
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摘要
在隐蔽通信领域中,混沌脉位调制(Chaotic Pulse-Position Modulation,CPPM)与混沌脉宽调制(Chaotic Pulse-Width Modulation, CPWM)已迅速发展起来,相比于Pattern时延差编码(Pattern Time Delay Shift Coding, PDS)与传统的脉宽调制(Pulse-Width Modulation, PWM),混沌调制后的编码通信隐蔽性更好,但通信速率没有得到显著改善。在CPPM技术基础上,联合CPWM技术提出一种应用于水声通信的新型混沌脉位-脉宽联合调制通信系统。混沌脉位-脉宽联合调制通信具有双重隐蔽的特点,相较于CPPM与CPWM通信系统,联合调制的隐蔽性更好;相较于PDS与PWM通信系统,联合调制通信速率更高、有效带宽更大。对混沌脉位-脉宽联合调制(Chaotic Pulse-Position and Pulse-Width Joint Modulation, CPPPWM)水声通信系统进行了研究,并在帐篷(Tent)映射下加以实现。对系统特性及误码率特性方面进行了分析,并从理论与仿真数据结果对联合调制系统的误码率进行分析,并验证CPPPWM通信系统的有效性。
In the field of covert communications, chaotic pulse-position modulation(CPPM) and chaotic pulse-width modulation(CPWM) have been developed rapidly. Compared with the traditional pulse-bit modulation(PPM) and pulse width modulation(PWM), chaotic modulation achieves the better communication concealment, but the communication rate is still not improved. Based on the CPPM technique, a new chaotic pulse-position and pulse-width joint modulation(named ‘CPPPWM') communication system for underwater acoustic communication is proposed, which has the characteristics of double concealment. Compared with the CPPM and CPWM communication system, the joint modulation has better concealment, higher communication speed and greater effective bandwidth. In this paper, the CPPPWM underwater acoustic communication system is studied and realized by Tent mapping. The characteristics of the system, particularly the bit error rate are analyzed, and the bit error rates of the joint modulation system obtained from the theoretical calculation and simulated test verify the validity of the CPPPWM communication system.
In the field of covert communications, chaotic pulse-position modulation(CPPM) and chaotic pulse-width modulation(CPWM) have been developed rapidly. Compared with the traditional pulse-bit modulation(PPM) and pulse width modulation(PWM), chaotic modulation achieves the better communication concealment, but the communication rate is still not improved. Based on the CPPM technique, a new chaotic pulse-position and pulse-width joint modulation(named ‘CPPPWM') communication system for underwater acoustic communication is proposed, which has the characteristics of double concealment. Compared with the CPPM and CPWM communication system, the joint modulation has better concealment, higher communication speed and greater effective bandwidth. In this paper, the CPPPWM underwater acoustic communication system is studied and realized by Tent mapping. The characteristics of the system, particularly the bit error rate are analyzed, and the bit error rates of the joint modulation system obtained from the theoretical calculation and simulated test verify the validity of the CPPPWM communication system.
引文
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[12]孟祥利,候孝民,廉昕.一种组合调制的脉冲超宽带测控信号[J].电讯技术,2017,57(3):282-287.MENG Xiangli,HOU Xiaomin,LIAN Xin.A combined modulation IR-UWB TT&C signal[J].Telecommunication Engineering,2017,57(3):282-287.
[2]张效文,路军,聂涛.一类改进型Logistic-Map混沌扩频序列[J].铁道学报,1998,20(3):76-81.ZHANG Xiaowen,LU Jun,NIE Tao.A class of modified logistic-map chaotic spread-spectrum sequences[J].Journal of the China Railway Society,1998,20(3):76-81.
[3]TAM W M,LAU F C M,TSE C K.Digital communication with chaos multiple access techniques and performance[M].Amsterdam:Elsevier Science,2007.
[4]张路蔚.隐蔽水声通信技术研究[D].哈尔滨:哈尔滨工程大学,2016.ZHANG Luwei.Research on covert underwater acoustic communication[D].Harbin:Harbin Engineering University,2016.
[5]惠俊英,刘丽,刘宏,等.Pattern--时延差编码水声通信研究[J].声学学报,1999,24(6):561-573.HUI Junying,LIU Li,LIU Hong,et al.A study on pattern time delay coding underwater acoustic communication[J].Acta Acustica,1999,24(6):561-573.
[6]QUYEN N X,YEM V V,HOANG T M.A Chaotic pulse-time modulation method for digital communication[J].Abstract&Applied Analysis,2012,Special Issue(2):1-9.
[7]黄晓萍.基于混沌扩频的水声通信技术研究[D].哈尔滨:哈尔滨工程大学,2007:41-57.HUANG Xiaoping.Research on underwater acoustic communication technology based on chaotic spread spectrum[D].Harbin:Harbin Engineering University,2007:41-57.
[8]CRUZ N A,FERREIRA B M,KEBKAL O,et al.Investigation of underwater acoustic networking enabling the cooperative operation of multiple heterogeneous vehicles[J].Marine Technology Society Journal,2013,47(2):43-58(16).
[9]RULKOV N F,SUSHCHIK M M,TSIMRING L S,et al.Digital communication using chaotic-pulse-position modulation[J].IEEETransactions on Circuits and Systems,2001,48(12):1436-1444.
[10]ADDABBO T,ALIOTO M,FORT A,et al.The digital tent map:performance analysis and optimized design as a low-complexity source of pseudorandom bits[J].IEEE Transactions on Instrumentation and Measurement,2006,55(5):1451-1458.
[11]殷敬伟,张晓,生雪莉,等.差分Pattern时延差编码水声通信技术研究[J].通信学报,2012,33(6):112-117.YIN Jingwei,ZHANG Xiao,SHENG Xueli,et al.Research on differential pattern delay shift coding underwater acoustic communication[J].Journal on Communication,2012,33(6):112-117.
[12]孟祥利,候孝民,廉昕.一种组合调制的脉冲超宽带测控信号[J].电讯技术,2017,57(3):282-287.MENG Xiangli,HOU Xiaomin,LIAN Xin.A combined modulation IR-UWB TT&C signal[J].Telecommunication Engineering,2017,57(3):282-287.