Noise statistics in a fast digital radio receiver: the Bedlam backend for the Parkes radio telescope

被引:10
|
作者
Bray, Justin D. [1 ,2 ]
Ekers, Ron D. [2 ]
Roberts, Paul [2 ]
机构
[1] Univ Adelaide, Sch Chem & Phys, Adelaide, SA, Australia
[2] CSIRO Astron & Space Sci, Epping, NSW, Australia
基金
澳大利亚研究理事会;
关键词
Coherent pulse detection; Gaussian noise statistics; Digital radio receivers; ADC non-linearity; MATHEMATICAL-ANALYSIS; NEUTRINOS;
D O I
10.1007/s10686-012-9327-9
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The digital record of the voltage in a radio telescope receiver, after frequency conversion and sampling at a finite rate, is not a perfect representation of the original analog signal. To detect and characterise a transient event with a duration comparable to the inverse bandwidth it is necessary to compensate for these effects, altering the statistical properties of the signal and making it difficult to determine the significance of a potential detection. We present an analysis of these modified statistics and demonstrate them with experimental results from Bedlam, a new digital backend for the Parkes radio telescope.
引用
收藏
页码:155 / 174
页数:20
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