Huang Zhitao

A frequency-based inter/intra partly coherent jamming style to SAR

This work is concerned with developing the frequency-based jamming technology against SAR. Firstly, the shift frequency jamming to LFM radar and SAR is analyzed. Then a modified shift frequency jamming to SAR, stepped shift frequency jamming (SSFJ), is presented and discussed. The theoretic research and simulation show that the SSFJ is inter/intra partly coherent with the SAR system and has a region imaging output for protecting the distributed targets. Its jamming power is much less than other jamming styles such as noise jamming, random shift frequency jamming and etc.

Single channel blind signal separation with Bayesian-MCMC

To solve the problem of single channel blind signal separation with unknown components number, a method based on Bayesian-MCMC is presented. First, single channel mixed signal, whose components have same general parameters, is modeled to change the problem into joint estimation of signal parameters and components number. Then, Bayesian theorem is applied in the joint estimation. Lastly, Bayesian computation of the estimation is accomplished with reversible jump MCMC. Simulation results indicate that the algorithm is practical and effective.

Angle-of-arrival estimation based on weighted cyclic spectrum

For cyclostationary signals, a generalized sensor array data model is presented and a new angle-of-arrival (AOA) estimation method based on weighted cyclic spectrum - GSC-SSF is developed in this paper. The proposed algorithm is more convenient and effective in forming the data matrix or the covariance. matrix for the MUSIC or ESPRIT algorithm to estimate AOA and suppress noise. Simulation results show better performance for the new method.

A direction-of-arrival estimation for source signals exploiting 1st-order cyclostationarity property

An array signal model exploiting first-order cyclostationarity of source signals is presented, and an efficient approach to estimate the DOA utilizing the least square (LS) method is developed in this paper. For the cases of single and multiple objects, simulations are made and the results indicate the efficiency of the given method.