查询词典 modulator-demodulator

In order to improve the carrier suppression factors Psup of the microwave ferrite modulator, the condition for maximum energy translation from the carrier to the sideband has been found through a mapping process by which a message space is mapped onto a signal space.

本文从提高微波铁氧体调制器的载波抑制度P _出发，从信息空间到信号空间的一般映射过程中找出载波能量最大限度转移到边带的条件。

The filters require close component matching to guarantee that carrier and single-sideband suppression—key measures of quadrature-modulator ideality—do not degrade as a function of baseband frequency.

滤波器需要匹配精密器件，确保载波和单边频带抑制——理想积分调制器的关键——作为基带频率不能降级。

Carrier suppression double sideband optical signal with 40 GHz repetitive frequency is generated by using an optical phase modulator along with optical filtering technique.

在中心站采用相位调制器结合滤波的方法产生重复频率为40 GHz的载波抑制双边带毫米波信号，利用交叉复用器分离开毫米波信号的上下边带，其中的一个边带强度调制数据速率为2.5 Gbit/s的下行基带信号，另一个边带被发送到基站调制上行传输的基带数据。

Allosteric enzymes may have more than one modulator.

它可以有一个或多个调节物。

Allosteric site A part of an enzyme to which a specific effector or modulator can be attached.

别构部位：可以结合特定效应物或者调节物的酶的一个部分。

Additional important meaningless note : The wires in the ampule modulator unit are marked as follows according to international convention: blue= neutral or live; blue and live= neutral and green; black= instant death.

附加的重要但毫无意义的提示：密封在调制解调器中的电线根据国际惯例标记如下：蓝色表示不带电或带电；蓝色带电等于绿色不带电；黑色则能立即致死。

It adopts a fractional-N PLL synthesizer to realize the FM modulator.An extra offset current has also been applied to eliminate the effects of the mismatch in CP.

该调制器基于小数分频锁相环技术，并在电荷泵单元中引入额外偏差电流消除电荷泵失配对带内噪声的影响。

The modulator (25) may also include an offset circuit (24) so that the modulated waveform includes a carrier frequency indicator.

所述调制器(25)还可以包括偏置电路(24)，使得调制波形包括载频指示符。

Characterization of filter spatial light modulator in optical correlator［J］.

在光学相关器中测试滤波空间光调制器的相位调制特性［J］。

The cutoff conditions of metal-clad waveguides or loss dielectric waveguides are discussed. The effects of metal-cladding on the cutoff condition of graded index waveguides are analyzed at first. The principle of cutoff intensity modulator has discussed in detail.

本文首次提出一种适合于分析含金属覆盖层的均匀和渐变介质波导在截止点附近的光学特性的近似的解析方法，并对金属覆盖层的均匀阶跃介质波导在截止点附近的模传播特性作了全面的分析，所得到的结果同精确的数值解结果相吻合。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。