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首页> 外文期刊>Proceedings of the IEE - Part C: Monographs >Signaloise performance of multiplier (or correlation) and addition (or integrating) types of detector
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Signaloise performance of multiplier (or correlation) and addition (or integrating) types of detector

机译：检测器的乘数（或相关）和加法（或积分）类型的信号/噪声性能

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摘要

An analysis is made, and numerical results are tabulated, of the processes of addition and multiplication of signals (comprising tone or noise) in the presence of random-noise backgrounds. These processes may be carried out on the input signals, in which case coincidence in time and phase of the signals is required, or on the signals after they have been rectified and smoothed (i.e. on the envelopes), in which case coincidence is required only in time. If the backgrounds are uncorrelated with one another, then the addition or multiplication of two or more scans together results in an increase in detectability of the signal. It is shown that, in general, multiplication is not more advantageous than addition from the point of view of signaloise ratios, and as it is more difficult to perform in practice, it cannot be universally recommended. But it is undoubtedly better than addition in certain cases, notably those in which long-term stability of adjustment is required and constant or predictable phase relationships permit multiplication of the inputs before rectification. Some subjective evidence is brought forward and discussed in relation to the difficult question of whether the better signaloise performance given by a quadratic response as compared with a linear response is really indicative of a higher probability of detection. The conclusions are not clear, but it is possible that this is the case.
机译：在存在随机噪声背景的情况下，对信号加法和乘法（包括音调或噪声）的过程进行了分析，并将结果列表了表格。这些过程可以在输入信号上进行，在这种情况下，需要时间和相位上的一致性，或者在信号经过整流和平滑后（即在包络上）进行一致性处理，在这种情况下，只需要一致性即可及时。如果背景互不相关，则两个或多个扫描的相加或相乘会导致信号的可检测性增加。从信号/噪声比的角度来看，通常显示相乘没有比相加更有利，并且由于在实践中更难以执行，因此不能被普遍推荐。但是，在某些情况下，它无疑比加法要好，尤其是那些需要长期稳定的调节并且恒定或可预测的相位关系允许在整流之前将输入相乘的情况。提出和讨论了一些主观证据，涉及一个难题，即与线性响应相比，由二次响应给出的更好的信号/噪声性能是否真的表明更高的检测概率。结论尚不明确，但可能是这种情况。

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