Es與A之間的比例關係與訊號的形狀有關。

Theproportionality between Es and A depends on the signal shape.

對於幅度為A、持續N個取樣的矩形脈衝或復指數訊號，則Es = N · A2。

For a rectangular pulse or a complexexponential of amplitude A and duration N samples, it is just Es = N· A2 .

從本書第六章可以看到，當使用匹配濾波器處理時，濾波器輸出的峰值SIR等於原始訊號的能量SIR。

It can be seen in Chap. 6 that when matchedfilters are used, the peak SIR at the filter output is the energy SIR of theoriginal signal.

SIR以不同的方式影響雷達系統檢測、跟蹤和成像效能。

SIR affects detection, tracking, andimaging performance in different ways.

一般來說，檢測效能隨著SIR的增加而提高，因為對於給定的虛警概率PFA，檢測概率PD是隨著SIR增大而增大的。

In general, detection performance improveswith SIR in the sense that PDincreases for a given PFAas SIR increases.

例如，從第六章可以看到，對於特定的目標行為模型和檢測演算法，PD與PFA的關係為：

For instance, it will be seen in Chap. 6that for one particular model of the target behavior and detection algorithm, PDis related to PFA according to

this behavior will be demonstrated in Chap.9.

在雷達成像（第8章）中，SIR直接影響影象的對比度或動態範圍（即最亮與最暗可見特徵的反射率之比）。

In radar imaging (Chap. 8), SIR directlyaffects the contrast or dynamic range (ratio of reflectivity of brightest todimmest visible features) of the image.

這些因素使得最大化雷達資料的SIR是非常必要的，並且本書討論的許多雷達訊號處理都是以提高SIR為主要目標。

These considerations make it essential tomaximize the SIR of radar data, and many radar signal processing operationsdiscussed in this text have as their primary goal increasing the SIR.

本書將結合每一種具體技術來討論實現的方法。

The ways in which this is done will bediscussed along with each technique.

1.4.2解析度

1.4.2. Resolution

與解析度和解析度單元密切相關的概念將頻繁出現。

The closely related concepts of resolutionand a resolution cell will arise frequently.

如果兩個等強度散射體在系統輸出時產生兩個可分開識別的訊號，而不是組合成單個未分離的輸出，則認為這兩個等強度散射體是可分辨的。

Two equal-strength scatterers areconsidered to be resolved if they produce two separately identifiable signalsat the system output, as opposed to combining into a single undifferentiatedoutput.

解析度的概念被應用於距離、橫向距離、多普勒頻移或速度以及到達角。

The idea of resolution is applied in range,cross-range, Doppler shift or velocity, and angle of arrival.

兩個散射體可以在一個維度（比如距離）內分辨，而在另一個維度（也許是速度）內無法分辨。

Two scatterers can simultaneously beresolved in one dimension, say range, and be unresolved in another, perhapsvelocity.

——本文譯自Mark A. Richards所著的《Fundamentals of Radar Signal Processing（Second edition）》

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