The experiment shows that the bandwidth of the time delay as a function of the modulation frequency changes in the absorption and gain regimes due to the carrier-lifetime variation. 实验结果表明,由于载体寿命的变化,在吸收和增益区域,带宽的时滞随着调制频率的变化而变化。
Effect of channel estimation error and delay on BER performance of adaptive Turbo coded modulation 信道估计误差与延迟对自适应Turbo编码调制的误码率性能影响
This paper expounds the group delay distortion problem existing in the single-channel IF modulation television transmitter and its negative influence on the pictures, and advances the correcting schemes and the alternative correcting circuits. 阐述了在单通道中频电视发射机中存在的群时延失真问题及其给图像带来的不良影响,提出了校正方案及可选择的校正电路。
Time-Delay Feedback and Parameter Modulation of Chaos Synchronization 时延反馈混沌系统的参数自适应同步控制
The Group Delay Distortion in the IF Modulation Television Transmitter and Its Correction 中频调制电视发射机中的群时延失真及其校正
Random time delay is induced only between the adjacent channels to improve the characteristics of fiber gratings 'linear crosstalk, with the cross modulation effects and the four wave mixing effects being suppressed simultaneously. 它通过在邻近信道间引入随机时延差,既能改善取样光纤光栅的线性串扰特性,又能抑制交叉相位调制效应和四波混频等非线性串扰。
Research on the Effect of Samples Delay to Adaptive Equalization Performances for Modulation 采样延迟对调制自适应均衡性能影响的研究
The author proposed the hardware circuit scheme and TDE ( Time Delay Estimation) model for the system with the PRBS and ultrasonic carrier adopting ASK modulation mode. 伪随机码与超声载波采用ASK(幅移键控)调制方式,介绍了伪随机码超声扩频测距硬件方案和超声测距时延估计模型。
The simulation results show that, compared with binary convolutional codes and Turbo codes, nonbinary dual-k codes can be regarded as a tradeoff among bit error rate ( BER), computations and decoding time delay, and it can be applied to M-ary orthogonal modulation systems. 结果表明,与二进制卷积码和Turbo码相比,非二进制双k码作为一种误比特率、计算量及译码时延的折衷方案,可以应用于正交调制系统。
For an intracavity modulating laser with long-time delay feedback device, the output will be instability and chaos, which is different from the case of extracavity modulation. 带长延时的腔内调制激光系统,其输出将出现不稳定和混沌现象,且其与腔外调制有本质的区别。
First, the physical mechanisms of the third harmonic generation in air by a two-color laser field are studied. It is found that the third harmonic spectrum varies with the temporal delay, chirp rate and the self-phase modulation of the fundamental and the second harmonic wave. 本文首先对空气中双色场飞秒激光泵浦产生三次谐波的物理机制进行了理论研究,总结了时间延迟、激光脉冲的啁啾率和自相位调制效应给三次谐波频谱分布带来的影响。
Finally, maximizing the delay and throughput-based utility function, the cognitive cross-layer scheduling scheme generates the optimal subcarrier selection, power and modulation allocation for each multimedia packet. 最后,通过最大化基于时延和吞吐量的效用函数,得出智能跨层分配策略,并可以为SU的每一个数据包产生最优的子载波选择、功率以及调制方式分配方案。
In addition, we experimentally demonstrated equidirectional XGM slow light and analyzed the group delay variation with the modulation phase difference at different modulation frequencies. 此外,我们还对同向XMG慢光,以及群延迟随调制频率增加而减小的现象进行了实验研究。
Focuses on the key technologies and innovative technologies of optical fiber delay network, including the external modulation driven-control technology, ultra-high-speed optical switches cascaded array technology, Amplitude compensation technology and design. 4. 重点阐述本光纤延迟网络的外调制偏置点控制技术,超高速光开关级联阵列技术,幅度补偿技术与设计等。
The analysis points out that the fiber grating spectral characteristic and the delay time through the fiber grating is depend on grating length, refractive index modulation depth, apodization and chirp. 分析指出光纤光栅光谱性质和传输性质与光纤光栅长度、折射率调制深度、切趾和啁啾有关。