To actualize carrier-frequency capture under extremely low signal-to-noise ratio(SNR) and large Doppler frequency shifting, a method is proposed, which bases on bispectrum estimation using time-domain extraction and down converter.

The maximum Doppler frequency shift is an important parameter which affects the performance of the OFDM system.

This paper introduces the methods of setting the jamming power, azimuth jam-delay, distance jam-delay and Doppler frequency-shift in the process of jamming the general radar.

In the satellite navigation and positioning system,Doppler frequency-shift is the key problems that degrade the performance of satellite receiver.

The production of Doppler frequency-shift is analyzed under the high dynamic condition.

Detection of Doppler shift based on excitation bifurcation of duffing oscillator;

Acquisition method of the Doppler shift based on the Costas loop;

Research on the method of elimination of the Doppler shift in the TDRSS;

Doppler frequency estimation of radar signal based on cyclic cross-correlation amplitude;

By calculating the auto-correlation function of cycle preamble of OFDM symbol, the maximum value of Doppler frequency excursion is obtained.

In this paper, the Doppler frequency and time-delay estimators of wideband echoes for LFM pulse radar are discussed.

Doppler frequency shift rapid acquisition and tracking for GMSK signals;

Simulation of Doppler frequency shift for a moving target and ground clutter;

The Doppler frequency shift of a moving ladder-type three level atom in broad-band squeezed vacuum;