现代电子技术
現代電子技術
현대전자기술
MODERN ELECTRONICS TECHNIQUE
2013年
19期
61-63
,共3页
双混频时差%相位噪声%数字下变频%阿伦方差
雙混頻時差%相位譟聲%數字下變頻%阿倫方差
쌍혼빈시차%상위조성%수자하변빈%아륜방차
dual mixer time difference%phase noise%digital down converter%Allan variance
为了突破传统时频测量技术的局限性，提高频率稳定度的精确程度，研究设计了一套数字式双混频时差测量系统，采用经典双混频时差测量原理，运用数字信号处理技术实现频标的比对测量。仿真结果证明，采用10 MHz信号进行测量时，得到相位噪声Allan方差优于3E-13/s，可对高精度频标进行实时测量和监控。
為瞭突破傳統時頻測量技術的跼限性，提高頻率穩定度的精確程度，研究設計瞭一套數字式雙混頻時差測量繫統，採用經典雙混頻時差測量原理，運用數字信號處理技術實現頻標的比對測量。倣真結果證明，採用10 MHz信號進行測量時，得到相位譟聲Allan方差優于3E-13/s，可對高精度頻標進行實時測量和鑑控。
위료돌파전통시빈측량기술적국한성，제고빈솔은정도적정학정도，연구설계료일투수자식쌍혼빈시차측량계통，채용경전쌍혼빈시차측량원리，운용수자신호처리기술실현빈표적비대측량。방진결과증명，채용10 MHz신호진행측량시，득도상위조성Allan방차우우3E-13/s，가대고정도빈표진행실시측량화감공。
In order to break through the limitations of traditional time frequency measuring technique and improve the preci-sion of the frequency stability,a digital dual mixer time difference measuring system is devised. The system is based on the tra-ditional dual mixer time difference measuring principle and the digital signal processing technique to realize the comparing mea-surement of the frequency scale. The simulation result shows that when measuring with the signal of 10MHz ,the Allan variance of the phase noise will be better than 3E-13/s,which can be used to real-time measure and monitor the frequency scale with high precision.
