摘要
跳频通信体制属于典型的抗干扰通信技术,其跳频速率、跳频带宽、信号隐蔽性和传输效率等是评价传输方案优劣的重要指标。针对高速宽带抗干扰卫星通信的应用需求,设计了一种支持多速率、多体制跳频传输的帧结构,提出了基于非均匀分散导频的频率估计算法。通过理论分析和仿真表明,该帧结构不仅可以实现频率估计与定时功能的信息共用,而且导频信号隐蔽性强,频率估计精度能够达到3×10-5,适应的速率变化范围超过24 dB。
FH communication is a typical anti-jamming communication technology,and its frequency hop rate,frequency hop bandwidth,signal concealment and transmission efficiency are important specifications for evaluating the transmission scheme. Considering the application requirements of high-speed broadband anti-jamming satellite communication,a frame structure of FH transmission supporting multiple rates and multiple modes is designed,and a frequency estimation algorithm based on non-uniform scattered pilot is proposed. Analysis and simulation indicate that this frame structure can realize the information sharing of frequency estimation and timing,and its pilot is highly concealed. In addition,the accuracy of frequency estimation can be up to 3 × 10-5and the range of rate variation is more than 24 dB.
出处
《无线电工程》
2014年第9期25-27,共3页
Radio Engineering
基金
国家部委基金资助项目
关键词
抗干扰
跳频
帧结构
非均匀分散导频
频率估计
anti-jamming
frequency hopping（FH）
frame structure
non-uniform scattered pilot
frequency estimation
