电讯技术
電訊技術
전신기술
TELECOMMUNICATIONS ENGINEERING
2015年
4期
395-400
,共6页
卫星通信%非协同通信%突发信号检测%匹配滤波法%初相估计
衛星通信%非協同通信%突髮信號檢測%匹配濾波法%初相估計
위성통신%비협동통신%돌발신호검측%필배려파법%초상고계
satellite communication%non-cooperative communication%burst signal detection%matching filter method%initial phase estimation
根据典型的海事三代卫星通信帧格式，首先采用能量检测算法结合匹配滤波法进行有效的突发信号的检测，然后根据信号检测的结果进行了突发信号的频率估计和初相估计，再采用初相注入结合锁相环的方式实现突发信号的解调。理论推导和计算仿真表明，该方法能够适应较低信噪比、较大频偏和起伏动态的影响，当信噪比大于10 dB时，信号检测概率基本达到100%，解调误码率低于2×10-3。
根據典型的海事三代衛星通信幀格式，首先採用能量檢測算法結閤匹配濾波法進行有效的突髮信號的檢測，然後根據信號檢測的結果進行瞭突髮信號的頻率估計和初相估計，再採用初相註入結閤鎖相環的方式實現突髮信號的解調。理論推導和計算倣真錶明，該方法能夠適應較低信譟比、較大頻偏和起伏動態的影響，噹信譟比大于10 dB時，信號檢測概率基本達到100%，解調誤碼率低于2×10-3。
근거전형적해사삼대위성통신정격식，수선채용능량검측산법결합필배려파법진행유효적돌발신호적검측，연후근거신호검측적결과진행료돌발신호적빈솔고계화초상고계，재채용초상주입결합쇄상배적방식실현돌발신호적해조。이론추도화계산방진표명，해방법능구괄응교저신조비、교대빈편화기복동태적영향，당신조비대우10 dB시，신호검측개솔기본체도100%，해조오마솔저우2×10-3。
According to the waveform protocol and frame structure of the Third Generation Maritime Satellite Communication,energy detection is combined with matching filter to realize burst signal detection,then fre-quency estimation and phase estimation is performed according to the result of signals detection. And then signal demodulation is realized through combining initialization phase estimation with phase locked loop ( PLL) . Both theoretical deduction and simulation indicate the method adapts to lower signal-to-noise ratio ( SNR) , higher frequency offset and bigger dynamic range. Signal detection probability approaches to 100 percent,and the demodulation bit error rate(BER) is under 2í10-3 when the Eb/N0 is above 10 dB.
