摘要
信道带宽窄,强多途,强噪声干扰一直是水下信息高速、可靠传输的主要障碍,提出了一种适合水声信道的用幅度-相移联合键控调制技术APSK与正交频分复用技术OFDM相结合的高阶调制的传输体制,可有效解决水下无线高速数据传输的带宽效率、功率效率和可靠性问题;介绍了APSK的原理及在基于OFDM的水声通信系统中的应用。计算机仿真结果证明,使用该方案的水声通信系统在高阶调制情况下综合性能优越。
Narrow bandwidth, and strong interference introduced by multipatb and severe noise are the main obstacle of the underwater signal＇s credible and high-speed transmission. A transmission system based on APSK （Amplitude-Phase Shift Keying） Modulation and OFDM（Ortbogonal Frequency Division Multiplexing） is presented to solve the problems of the bandwidth efficiency, power efficiency, and reliability for high-speed UWA communication. The schemes of APSK and application in UWA system based on OFDM are introduced. Simulating results show that the method has a better performance.
出处
《电声技术》
2008年第3期73-75,共3页
Audio Engineering
基金
国家"863"资助项目(2006AA09Z105)
