现代电子技术
現代電子技術
현대전자기술
MODERN ELECTRONICS TECHNIQUE
2014年
15期
35-37,40
,共4页
RCS%惟一字%载波同步%相位估计
RCS%惟一字%載波同步%相位估計
RCS%유일자%재파동보%상위고계
RCS%unique-word%carrier synchronization%phase estimation
RCS信道具有用户多、时钟同步要求高和帧长较短等特点,因而要求快速的同步搜索。为了实现RCS信道快速载波同步,在帧结构中专门设计了惟一字,将基于惟一字的载波同步算法和基于Viterbi-Viterbi算法的二次相位估计相结合,设计了易于实现的载波同步方案。经Matlab仿真,证明了方案的性能。所用设计可简单快速实现相位同步,并在某卫星终端应用中取得了明显的效果。
RCS信道具有用戶多、時鐘同步要求高和幀長較短等特點,因而要求快速的同步搜索。為瞭實現RCS信道快速載波同步,在幀結構中專門設計瞭惟一字,將基于惟一字的載波同步算法和基于Viterbi-Viterbi算法的二次相位估計相結閤,設計瞭易于實現的載波同步方案。經Matlab倣真,證明瞭方案的性能。所用設計可簡單快速實現相位同步,併在某衛星終耑應用中取得瞭明顯的效果。
RCS신도구유용호다、시종동보요구고화정장교단등특점,인이요구쾌속적동보수색。위료실현RCS신도쾌속재파동보,재정결구중전문설계료유일자,장기우유일자적재파동보산법화기우Viterbi-Viterbi산법적이차상위고계상결합,설계료역우실현적재파동보방안。경Matlab방진,증명료방안적성능。소용설계가간단쾌속실현상위동보,병재모위성종단응용중취득료명현적효과。
RCS channel,which has many characteristics,such as multi-user,high clock synchronization requirement and short frame length,needs rapid carrier synchronization. The unique-words(UW)are designed in data frame to realize fast carrier synchronization of RCS channel. A carrier synchronization scheme,which is easy to realize,was designed in combination with carrier synchronization algorithm based on UW and twice-phase-estimation method based on Viterbi-Viterbi algorithm. The perfor-mance of this design was proved by Matlab simulation. The design scheme can realize phase synchronization rapidly,and has been applied successfully to a satellite transceiver.