Optimal training signals for joint estimation of channel response and frequency offset in multiuser OFDM;

Performance comparison of achievable bit rate in FMT and OFDM system in the presence of frequency offset;

Analysis and simulation of the frequency offset influence on FMT system;

Study on frequency deviation expansion methods for frequency modulated crystal oscillator;

Its function is to measure the frequency deviation of low frequency modulation.

The theoretical calculation of the primary electric parmeters,frequency deviation, distortion, frequency respond,signal-noise ratio of the FM transmitter is analysed, and the computer calculation of the automatic monitoring of these primary parameters and the rectifying method of the calculation error are also studied.

In wireless communication system, there is a large frequency bias between carrier frequency and local oscillating frequency.

Frequency estimator which based on two-order adaptive notch filter is the one frequently used for sinusoid on engineering,with a precondition that there is a small frequency bias of reference signal to input signal.

Influence of He-Ne Pressure on Biasing Value of Zeeman Laser Gyroscope;

The biasing effect of Zeeman laser gyroscope affected by He-Ne gas was studied theoretically and experimentally.

Two new methods of accurate measurement for frequency modulation deviation;

For two main problems of code acquisition technologies used in LEO satellite communication,which are limited ability of adapting to carrier frequency offset and code frequency offset,thre.