modulation bandwidth
2.The modulation bandwidth and the relaxation oscillation frequencies of the laser are quite different at different injection powers and wavelengths.
3.High-speed 1.3μm InGaAsP/InP mesa-structure edge-emitting LEDs have been fabricatedby liquid-phase epitaxy. The modulation bandwidth has been increased by heavy Zn doping inthe active region and by introducing a mesa-structure. A -3dB modulation bandwidth of500 MHz and light output power of 130μW at 70 mA have been obtained.
4.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 principle of computer simulation for optical fiber TV transmisson of equal width PFM and SWFM modulation ways was expounded. To parameters of different modulation index, optical fiber bandwidth etc. , the simulated results of performance indexes: system nonlinear distortion, harmonic interfere cet.
6.These new type Digital PLC use SSB, QAM or TCM modulation technology and occupy the bandwidth between several kHz to dozens of kHz with the transmission speed less than 100kbps.
7.Novel Technology for Improvement of Modulation Speed of LD Module and Frequency Response Bandwidth of PIN-FET Module Made in China
8.The experiment waveform generation can generate 30 MHz Continuous Wave (CW), Linear Frequency Modulation Continuous Wave (LFMCW) with 10 MHz bandwidth working at 30MHz carrier, simulated echo of object which is delayed LFMCW signal. The test results completely meet the system requirements.
9.After analyzing the symbol structure of pulse position modulation (PPM), digital pulse interval modulation (DPM) and dual-header pulse interval modulation(DH-PIM) in detail, the average transmission power and bandwidth efficiency are analyzed. On the meantime, the slot error rate is also analyzed on the given model.
10.This thesis begins with HFC network theory and DOCSIS, analyses modulation/ demodulation process of data communication in HFC. Then, several theories are analysed including QAM (Quadrature Amplitude Modulation), Nyquist root square filter , FEC(forward Error Correction), MAP(Bandwidth Allocation Map).
