The role of situation awareness in naturalistic decision making
The role of situation awareness in naturalistic decision making
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发表时间：
1997
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通讯作者：
M. Endsley
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作者：
M. Endsley
一种数字鉴相器，周期性地检测数据被编码为离散相位变化的载波信号的相位角θ k。相干或差分调相载波信号分为同相和正交相分量RoSin θ (t)和RoCos θ (t)。每个信号分量以预定的调制间隔采样，并转换成具有RoCos θ k和RoSin θ k形式的数字字。在一种配置中，将两个信号分量应用于数字分频网络，该分频网络形成两个数字字的商PSI，使得…PSI…1运算。它形成了一个限定在角度</= 45度的数字参考相角PHI，通过选择逻辑进行校正，形成所需的相角θ k。一旦θ k为每个调制间隔已知，就可以很容易地提取编码数据，因为θ k与编码数据成正比。
A digital phase detector which periodically detects the phase angle theta k of a carrier signal in which data are encoded as discrete phase changes. A coherent or differential phase-modulated carrier signal is split into its in-phase and quadrature phase components RoSin theta (t) and RoCos theta (t). Each signal component is sampled at a predetermined modulation interval and converted into a digital word having the form RoCos theta k and RoSin theta k. In one configuration, the two signal components are applied to a digital divider network which forms the quotient PSI of the two digital words such that ¦ PSI ¦ 1 operation, which forms a digital reference phase angle PHI limited to an angle </= 45 DEG is corrected by selection logic to form the desired phase angle theta k. Once theta k is known for each modulation interval, the encoded data may be readily extracted, since theta k is proportional to the encoded data.