发明名称 Phase noise measurement system and method.
摘要 <p>Three independent signal sources (14, 15, 20) are used to statistically derive the power spectral density of the phase noise content of signals from each of them. This is accomplished by mixing (30) each of the signals two at a time (i.e., signal one with signal two, signal one with signal three, and signal two with signal three) and capturing the resultant difference signals, such as with a waveform recorder (11, 12, 13), for example. A servo electronics loop (25', 26') is used to remove the carrier and any long term signal drift from the resultant difference signals. Statistical analysis is then used to compute the composite power spectral densities of the resultant difference signals, and to solve for the individual power spectral densities of the original signals. The present system (10) and method uses the mathematical relationships between the three sources that have similar magnitudes of phase noise, to compute the power spectral density of the noise content of signals from each source (14, 15, 20).</p>
申请公布号 EP0660124(A2) 申请公布日期 1995.06.28
申请号 EP19940120059 申请日期 1994.12.17
申请人 HUGHES AIRCRAFT COMPANY 发明人 MEYERS,CLIFFORD W.
分类号 G01R27/28;G01R29/26;G01S7/40;(IPC1-7):G01R29/26;G01R25/00 主分类号 G01R27/28
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