modulation characteristic
1.To accomplish this task, we do the design from two aspects: the design of material structure and the subsequent process to confirm the modulation characteristic of the laser;
2.This assignment selects GaInAsP/InP material system to grow 1550nm high-speed laser. We study the modulation characteristic and the waveguide structure of the laser.
3.Finite element method is used to analyze the performance(e.g.microwave effective refractive index,modulation bandwidth,and characteristic impedance) of the novel modulator with ACPS or SCPS electrodes.
5.The recognition basic modulation styles(DSB,FM,PM,2ASK,2FSK and 2PSK) is discussed by using characteristic parameter and a computer simulation is made on communication signals in Gaussian hot noise.
6.In 3.1 the reflection characteristic of F-P cavity is presented. In 3.2 the optical-electronic modulation is introduced and the technique of how to make a resonant EOM is discussed also.
7.The cyclic characteristic of the transition matrix for the state of Markov chain of CPM is discussed after a simple introduction to the finite state machine defined for the continuous phasa modulation (CPM).
8.Compared with other kinds of gyro, FOG has born ability to restrict vibration, but its performance is still affected by vibration. This paper discusses the discipline of FOG vibration characteristic in mechanical vibration theory and vibration modulation on waveguide.
9.The method can measure the following parameters, (pulse attitude)PA, (pulse width)PW, (time of approach)TOA, SNR, (radio frequency)RF, pulse envelope characteristic parameters and intra-pulse modulation parameters with a high precision and a high discrimination.
10.Some key base-band processing(BBP) techniques in digital video wireless transmission are researched. Based on the characteristic of DSP, the algorithms of π/4-DQPSK modulation and demodulation are optimized as well. The differential demodulation of base-band is simulated and hardware solution by DSP chip for π/4-DQPSK modulation and demodulation is implemented.
