无线电工程
無線電工程
무선전공정
RADIO ENGINEERING OF CHINA
2014年
9期
25-27
,共3页
抗干扰%跳频%帧结构%非均匀分散导频%频率估计
抗榦擾%跳頻%幀結構%非均勻分散導頻%頻率估計
항간우%도빈%정결구%비균균분산도빈%빈솔고계
anti-jamming%frequency hopping ( FH)%frame structure%non-uniform scattered pilot%frequency estimation
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。
跳頻通信體製屬于典型的抗榦擾通信技術，其跳頻速率、跳頻帶寬、信號隱蔽性和傳輸效率等是評價傳輸方案優劣的重要指標。針對高速寬帶抗榦擾衛星通信的應用需求，設計瞭一種支持多速率、多體製跳頻傳輸的幀結構，提齣瞭基于非均勻分散導頻的頻率估計算法。通過理論分析和倣真錶明，該幀結構不僅可以實現頻率估計與定時功能的信息共用，而且導頻信號隱蔽性彊，頻率估計精度能夠達到3×10-5，適應的速率變化範圍超過24 dB。
도빈통신체제속우전형적항간우통신기술，기도빈속솔、도빈대관、신호은폐성화전수효솔등시평개전수방안우렬적중요지표。침대고속관대항간우위성통신적응용수구，설계료일충지지다속솔、다체제도빈전수적정결구，제출료기우비균균분산도빈적빈솔고계산법。통과이론분석화방진표명，해정결구불부가이실현빈솔고계여정시공능적신식공용，이차도빈신호은폐성강，빈솔고계정도능구체도3×10-5，괄응적속솔변화범위초과24 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 trans-mission 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 3×10-5 and the range of rate variation is more than 24 dB.
