A Method for Improving Voice Transmission on IEEE 802.11 WLAN;

The paper presents the composition and the operation principle of the satellites voice transmission system and explains in detail the key techniques for realization and the measures for solving the problems.

A new voice transmission technique over low voltage powerline is presented.

A new-style fiber audio transmission method that can be used in the long distance transmission is presented,which performs signal modulation by the strain-optic effects and signal demodulation by the all-fiber interferometer.

UDP or RTP protocol is usually adopted during voice transfer.

Analysis of shielding effectiveness of rectangular cavity of loaded PCB with aperture by transmission line method;

Specific contact resistivities(e_c) were measured by transmission line method(TLM) and a lowest e_c of 1.

This paper studies a relationship between input impedance and average characteristic impedance (w), wavelength shorten factor(n) and equivalent diameter through analysis of input impedance date of 76m and 138m antenna and proposes a view on the reason for bigger error of input impedance using transmission line method and a correction method.